Method and device for calculating equivalent natural vibration period of fused salt storage equipment

Abstract

The invention provides a method and device for calculating the equivalent natural vibration period of fused salt storage equipment, and relates to the technical field of fused salt storage equipment management.The method comprises the steps that dynamic operation parameters of the fused salt storage equipment are obtained, and the dynamic operation parameters comprise the fused salt liquid level change range, the fused salt temperature change interval and the telescopic deformation amount of the diameter of the outer wall of the fused salt storage equipment under temperature change; calculating an equivalent molten salt liquid level according to the molten salt liquid level change range; calculating equivalent molten salt density according to the molten salt temperature change interval; according to the telescopic deformation of the diameter of the outer wall of the fused salt storage equipment in the fused salt liquid level change range, the equivalent medium radius is calculated; calculating a correction coefficient according to the equivalent molten salt liquid level and the equivalent medium radius; and calculating an equivalent natural vibration period value of the fused salt storage equipment based on the equivalent fused salt liquid level, the equivalent fused salt density, the equivalent median radius and the correction coefficient. According to the method, the resonance risk caused by self-vibration period estimation deviation can be effectively avoided, and the stability and safety of the fused salt storage equipment under the action of dynamic loads such as earthquakes and wind vibration can be enhanced.

Description

Technical Field

[0001] This invention relates to the field of molten salt storage equipment management technology, and in particular to a method and apparatus for calculating the equivalent natural vibration period of molten salt storage equipment. Background Technology

[0002] Against the backdrop of energy structure transformation and the rapid development of energy storage technology, molten salt storage equipment, as a core component of molten salt energy storage systems, plays a crucial role in fields such as solar thermal power generation, grid peak shaving, thermal power plant renovation, and industrial waste heat utilization. By storing high-temperature molten salt media, it stores electrical energy or the heat energy converted from solar thermal energy as thermal energy for extended periods. During peak electricity demand or grid peak shaving, the stored heat energy is released for power generation or heating, effectively balancing electricity supply and demand, achieving large-scale electricity storage and peak shaving, improving grid resilience, and possessing significant economic and environmental benefits.

[0003] However, molten salt storage equipment differs significantly from other steel container storage equipment. Regarding the storage medium and temperature characteristics, molten salt storage equipment stores hot molten salt, with hot tank temperatures reaching 575℃ and cold tank temperatures reaching 400℃, far exceeding the temperature range of conventional storage equipment (-50℃ to 200℃). It also requires extremely high insulation, necessitating a 400-800mm thick insulation layer. The weight and dimensions of this insulation layer cannot be ignored when calculating the natural vibration period. In terms of operating conditions, the molten salt levels in the cold and hot molten salt tanks of solar thermal and energy storage power plants change frequently with operating conditions, resulting in a significant dynamic characteristic of the storage equipment's mass. Simultaneously, the molten salt density changes with temperature, further affecting the calculation of the natural vibration period. Regarding thermal deformation, changes in molten salt level are accompanied by temperature differences, causing the outer diameter of the storage equipment to freely expand and contract, resulting in repeated changes in thermal displacement. The overall outer wall dimensions are also an important parameter for calculating the natural vibration period.

[0004] Currently, no domestic or international standards and specifications provide a formula or reference algorithm for calculating the natural vibration period of high-temperature molten salt storage equipment. Existing conventional period calculation algorithms for storage equipment fail to consider unique factors such as the thick insulation layer, dynamically changing mass, and expansion and contraction deformation under temperature fields. Meanwhile, as the energy storage and thermal storage industry develops towards large-scale and centralized operations, the storage capacity and diameter of molten salt storage equipment are continuously increasing. Storage capacity has expanded from 15,000 m³ to 30,000 m³, and the diameter of storage equipment has increased from the conventional 36 m to 45 m and above. This makes the accurate calculation of the natural vibration period of storage equipment an urgent need for seismic and wind load calculations and subsequent engineering design. A comprehensive and accurate calculation method is urgently needed to provide scientific and reasonable data support for engineering practice. Summary of the Invention

[0005] To overcome the problems existing in related technologies, the present invention provides a method and apparatus for calculating the equivalent natural vibration period of a molten salt storage device.

[0006] According to a first aspect of the present invention, a method for calculating the equivalent natural period of a molten salt storage device is provided, the method comprising: Acquire dynamic operating parameters of the molten salt storage equipment, including the range of molten salt level changes, the range of molten salt temperature changes, and the amount of expansion and contraction of the outer diameter of the molten salt storage equipment under temperature changes; Calculate the equivalent molten salt level based on the range of molten salt level variation; Calculate the equivalent molten salt density based on the molten salt temperature variation range; Calculate the equivalent mid-radius based on the amount of expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation; Calculate the correction factor based on the equivalent molten salt level and the equivalent mid-radius; The equivalent natural period of the molten salt storage device is calculated based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient.

[0007] In some exemplary embodiments of the present invention, based on the foregoing scheme, calculating the equivalent molten salt level according to the range of molten salt level variation includes: Based on the proportion of time spent at the intermediate liquid level during normal molten salt circulation, an equivalent coefficient for molten salt level is generated, where the intermediate liquid level is the liquid level located between the highest and lowest liquid levels. Obtain the highest and lowest liquid level values ​​within the range of molten salt liquid level variation; Calculate the liquid level difference between the highest and lowest liquid level values; The equivalent molten salt level is generated by adding the product of the liquid level difference and the molten salt level equivalence coefficient to the lowest liquid level value.

[0008] In some exemplary embodiments of the present invention, based on the foregoing scheme, the equivalent coefficient of the molten salt level is 0.5 to 0.7.

[0009] In some exemplary embodiments of the present invention, based on the foregoing scheme, calculating the equivalent molten salt density according to the molten salt temperature variation range includes: Calculate the average temperature within the range of molten salt temperature variation; Obtain the equivalent molten salt density corresponding to the average temperature; Based on the density of the insulation layer and connecting accessories along the entire molten salt storage tank wall, combined with the cantilever length and its own density, an equivalent density coefficient is generated; The equivalent molten salt density is generated by adding the product of the equivalent density coefficient and the density of the insulation layer and connecting accessories along the entire wall of the molten salt storage equipment tank.

[0010] In some exemplary embodiments of the present invention, based on the foregoing scheme, the equivalent density coefficient is 0.15 to 0.2.

[0011] In some exemplary embodiments of the present invention, based on the foregoing scheme, the equivalent mid-radius is calculated according to the amount of expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation, including: Based on the temperature difference between the initial temperature during salt injection and the molten salt temperature after uniform preheating, as well as the temperature difference between the molten salt temperature after uniform preheating and the molten salt temperature after construction, the median radius coefficient of the outer wall diameter of the molten salt storage equipment under steady-state conditions is generated. Based on the temperature difference of molten salt during normal circulation high and low liquid level switching and the linear expansion coefficient of the molten salt storage equipment material, the mid-radius coefficient of the outer wall diameter of the molten salt storage equipment under circulation conditions is generated. The equivalent mid-radius is generated based on the initial mid-radius dimension of the molten salt storage device, the insulation layer thickness of the molten salt storage device, the mid-radius coefficient of the outer wall diameter of the molten salt storage device in a steady state, and the mid-radius coefficient of the outer wall diameter of the molten salt storage device in a cyclic state.

[0012] In some exemplary embodiments of the present invention, based on the foregoing scheme, the equivalent natural period value of the molten salt storage device is calculated based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient. include: in, This represents the correction factor. Indicates the equivalent mid-radius. Indicates the equivalent molten salt density. Indicates the equivalent molten salt level. This indicates the elastic modulus of the material used in molten salt storage equipment. This indicates the wall thickness of a molten salt storage device located at a height of 1 / 3 tank.

[0013] According to a second aspect of the present invention, a device for calculating the equivalent natural period of a molten salt storage device is provided, comprising applying the above-described method for calculating the equivalent natural period of a molten salt storage device, including: The data acquisition module is used to acquire the dynamic operating parameters of the molten salt storage equipment, including the range of molten salt level changes, the range of molten salt temperature changes, and the amount of expansion and contraction of the outer wall diameter of the molten salt storage equipment under temperature changes. The liquid level calculation module is used to calculate the equivalent molten salt liquid level based on the range of molten salt liquid level changes. The density calculation module is used to calculate the equivalent molten salt density based on the molten salt temperature variation range. The radius calculation module is used to calculate the equivalent mid-radius based on the expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation. The coefficient calculation module is used to calculate the correction coefficient based on the equivalent molten salt level and the equivalent mid-radius. The period calculation module is used to calculate the equivalent natural vibration period value of the molten salt storage device based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient.

[0014] According to a third aspect of the present invention, an electronic device is provided, comprising: a processor; and a memory, wherein the memory stores computer-readable instructions, which, when executed by the processor, implement the method for calculating the equivalent natural period of the molten salt storage device in the first aspect.

[0015] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, wherein when the computer program is executed by a processor, it implements the method for calculating the equivalent natural period of the molten salt storage device in the first aspect.

[0016] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects: In this embodiment of the invention, on the one hand, it can break through the limitations of traditional single-parameter calculation, comprehensively consider dynamic operating parameters such as molten salt level, temperature, and deformation of the outer wall of the storage equipment, and quantify complex working conditions by calculating equivalent molten salt level, equivalent molten salt density, and equivalent median radius. Combined with correction coefficients for precise correction, it effectively eliminates the interference of parameter fluctuations on the calculation results, making the equivalent natural vibration period calculation results closer to the actual working conditions, significantly reducing calculation errors, and providing high-precision data support for engineering design and safety assessment.

[0017] On the other hand, instead of analyzing a single parameter in isolation, this method systematically considers the coupled effects of multiple parameters during the operation of molten salt storage equipment. Changes in molten salt level affect the load distribution of the storage equipment, and temperature changes lead to changes in molten salt density and storage equipment size. This method incorporates these factors into the calculation system, fully presenting the dynamic characteristics of molten salt storage equipment under different operating conditions, ensuring the universality and adaptability of the calculation model, and making it widely applicable to molten salt storage equipment with different operating conditions.

[0018] Therefore, the embodiments of the present invention can effectively avoid the resonance risk caused by the deviation in the estimation of the natural vibration period, provide a scientific basis for the structural design, seismic reinforcement and safety protection measures of storage equipment, enhance the stability and safety of molten salt storage equipment under dynamic loads such as earthquakes and wind vibrations, and ensure the safe and reliable operation of energy storage systems.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the specification, serve to explain the principles of the invention.

[0021] Figure 1 A schematic diagram of the system architecture of an exemplary application environment for which a method and apparatus for calculating the equivalent natural period of a molten salt storage device, according to embodiments of the present invention, can be applied; Figure 2 The schematic diagram illustrates a flowchart of a method for calculating the equivalent natural period of a molten salt storage device according to some embodiments of the present invention; Figure 3 The schematic diagram illustrates the structure of a molten salt storage device according to some embodiments of the present invention; Figure 4 The schematic diagram illustrates the structure of an insulation layer according to some embodiments of the present invention; Figure 5 A schematic diagram illustrating the mid-radius and related parameters of a molten salt storage device according to some embodiments of the present invention is shown. Figure 6 A schematic diagram illustrates a comparison of fitting curves for calculating the equivalent natural period of a molten salt storage device using the finite element method and the present invention, according to some embodiments of the present invention. Figure 7 A schematic diagram illustrates a calculation device for the equivalent natural period of a molten salt storage device according to some embodiments of the present invention; Figure 8 The schematic diagram illustrates the structure of a computer system of an electronic device according to some embodiments of the present invention.

[0022] Figure 9 A schematic diagram of a computer-readable storage medium according to some embodiments of the present invention is shown.

[0023] Explanation of reference numerals in the attached figures 310. Tank bottom plate; 320. Tank wall plate; 330. Tank top plate; 340. Insulation layer. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0025] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0027] Figure 1 A schematic diagram of the system architecture of an exemplary application environment for which a method and apparatus for calculating the equivalent natural period of a molten salt storage device, according to embodiments of the present invention, can be applied.

[0028] like Figure 1 As shown, system architecture 100 may include one or more terminal devices such as desktop computer 101, portable computer 102, and smartphone 103, network 104, and server 105. Network 104 is used as a medium to provide a communication link between the terminal devices and server 105. Network 104 may include various connection types, such as wired, wireless communication links, or fiber optic cables, etc. Terminal devices may be various electronic devices with data processing capabilities, which have a display screen for displaying the calculation process and / or calculation results of the equivalent natural period of the molten salt storage device to the user, including but not limited to the aforementioned desktop computer, portable computer, smartphone, etc. It should be understood that... Figure 1 The number of terminal devices, networks, and servers shown is merely illustrative. Depending on implementation needs, there can be any number of terminal devices, networks, and servers. For example, server 105 could be a sub-server cluster composed of multiple sub-servers.

[0029] The method for calculating the equivalent natural period of a molten salt storage device provided in this embodiment of the invention can generally be executed by a terminal device, and correspondingly, the device for calculating the equivalent natural period of a molten salt storage device is generally located in the terminal device. However, it is readily understood by those skilled in the art that the method for calculating the equivalent natural period of a molten salt storage device provided in this embodiment of the invention can also be executed by a server 105, and correspondingly, the device for calculating the equivalent natural period of a molten salt storage device can also be located in the server 105. This exemplary embodiment does not impose any special limitations on this.

[0030] Furthermore, it should be understood that the method for calculating the equivalent natural period of the molten salt storage device according to embodiments of the present invention can be configured as a software module. In some implementation scenarios, the calculation scheme for the equivalent natural period of the molten salt storage device of the present invention can be deployed separately to calculate the natural period of different molten salt storage devices, thereby realizing full lifecycle management of different molten salt storage devices. In other implementation scenarios, the calculation scheme for the equivalent natural period of the molten salt storage device of the present invention can be deployed in other software as a functional module of that software, such as in the analysis software for molten salt storage devices. The present invention does not impose any particular restrictions on the application of the method for calculating the equivalent natural period of the molten salt storage device.

[0031] The embodiments of the present invention will now be described in detail.

[0032] like Figure 2 As shown, Figure 2 This is a flowchart illustrating a method for calculating the equivalent natural period of a molten salt storage device according to an exemplary embodiment of the present invention, comprising the following steps: S210: Obtain dynamic operating parameters of the molten salt storage equipment, including the range of molten salt level changes, the range of molten salt temperature changes, and the amount of expansion and contraction of the outer diameter of the molten salt storage equipment under temperature changes. S220: Calculate the equivalent molten salt level based on the range of molten salt level variation; S230: Calculate the equivalent molten salt density based on the molten salt temperature variation range; S240: Calculate the equivalent mid-radius based on the expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation; S250: Calculate the equivalent natural period value of the molten salt storage device based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient; S260: Calculate the equivalent natural period value of the molten salt storage device based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient.

[0033] In S210, the dynamic operating parameters of the molten salt storage equipment are obtained, including the range of molten salt level changes, the range of molten salt temperature changes, and the amount of expansion and contraction of the outer wall diameter of the molten salt storage equipment under temperature changes.

[0034] This invention does not impose specific limitations on the shape of the molten salt storage device. Generally, the molten salt storage device 300 can be a vertical cylindrical steel storage device, see reference. Figure 3 As shown, it mainly consists of a tank bottom plate 310, a tank wall plate 320, a tank top plate 330, and an insulation layer 340.

[0035] The tank bottom plate 310 is composed of uniformly spaced central and edge plates welded together. The slope from the center to the edge of the tank bottom plate 310 is generally 1.0% to 2.0%. The tank wall plates 320 can be designed with a gradually increasing thickness from top to bottom, with each layer of wall plates having the same thickness. The butt joints of adjacent tank wall plates 320 are all connected by full penetration welding, with the center radius dimension as the standard from top to bottom.

[0036] The tank top plate 330 can adopt a rib ring structure arrangement. Its main stress system consists of multiple uniform radial steel beams and multiple uniform circumferential members, with auxiliary support members in the middle. Each radial main stress member is approximately arched, and the rise-span ratio of the tank top arch ranges from 1 / 7.0 to 1 / 9.0.

[0037] The insulation layer 340 is connected to the tank wall plate 320 and the tank top plate 330 by welded fasteners. The fasteners are evenly distributed along the tank wall plate 320, with one end firmly welded to the tank wall plate 320 and the other end freely cantilevered and inserted into the insulation layer, achieving a tight fit against the tank wall. (See details...) Figure 4 As shown, the fasteners consist of supporting steel plate rings 410 and insulation nails 420. The supporting steel plate rings 410 are arranged in a ring every 1.5~2.0m along the tank wall, and the insulation nails 420 are arranged in a staggered pattern along the tank wall at equal intervals both horizontally and vertically. Therefore, this fastener assembly method can secure the insulation layer ring by ring and point by point. When the temperature field changes, the tank wall moves the fasteners, and each fastener moves the insulation layer; both can freely and synchronously expand and contract, coordinating their deformation.

[0038] This invention does not limit the specific content of dynamic operating parameters. In some embodiments, dynamic operating parameters refer to indicators that change in real time during the operation of the storage device, rather than static or design values. Specifically, these may include the range of molten salt level changes, the range of molten salt temperature changes, and the amount of expansion and contraction of the outer diameter of the molten salt storage device under temperature changes.

[0039] Molten salt level variation range refers to the range of changes in the height of molten salt in a storage device (usually expressed in meters or as a percentage). For example, during heating (such as molten salt injection) or deheating (such as molten salt extraction), the level will fluctuate. The dynamic range represents the minimum to maximum level (e.g., from 20% full to 80% full), which is crucial for controlling storage device capacity and maintaining a safe level.

[0040] The molten salt temperature range refers to the range of temperature variation in molten salt (usually expressed in degrees Celsius). During operation, the molten salt temperature will fluctuate due to heating (such as solar thermal collectors) or cooling (such as heat exchange). For example, the temperature range might be from 290°C to 565°C (common in nitrate molten salts). Monitoring this range helps ensure thermal efficiency and prevent excessively high or low temperatures from causing the salt to solidify or decompose.

[0041] The expansion and contraction of the outer wall diameter of molten salt storage equipment due to temperature changes refers to the amount of expansion or contraction (usually measured in millimeters) of the outer wall diameter caused by temperature variations. Temperature changes in molten salt cause thermal expansion and contraction of the metal outer wall; the amount of deformation depends on the material's coefficient of thermal expansion (e.g., the coefficient of thermal expansion for stainless steel is approximately 1.7 × 10⁻⁻⁻⁴). 5 / °C). This quantity is calculated or measured to assess structural stress, prevent leakage or deformation damage, and ensure the safe operation of storage equipment.

[0042] In S220, the equivalent molten salt level is calculated based on the range of molten salt level variation.

[0043] The equivalent molten salt level is an "equivalent" value designed to eliminate the influence of temperature or other factors. In some implementations, the equivalent molten salt level can be calculated using either a simple averaging method or a density correction method. The simple averaging method involves taking the average of the level range if density changes are negligible (e.g., small temperature changes). The density correction method is typically based on the relationship between density and temperature; if the molten salt density changes significantly with temperature (common in molten salts such as nitrates), the equivalent level needs to be adjusted to the level at a reference temperature to more accurately represent the volume or mass of the molten salt.

[0044] In an embodiment of the present invention, calculating the equivalent molten salt level based on the range of molten salt level variation includes: Based on the proportion of time spent at high and low liquid levels during normal molten salt circulation, an equivalent coefficient for molten salt liquid level is generated. Obtain the highest and lowest liquid level values ​​within the range of molten salt liquid level variation; Calculate the liquid level difference between the highest and lowest liquid level values; The equivalent molten salt level is generated by adding the product of the liquid level difference and the molten salt level equivalence coefficient to the lowest liquid level value.

[0045] The highest liquid level refers to the highest liquid level reached by the molten salt pump in the molten salt storage tank. This level is determined by the duration of thermal storage and the scale of the power plant. The lowest liquid level refers to the lowest liquid level reached by the molten salt pump. This level is determined by the function of the molten salt pump. During normal operation, molten salt is initially stored at the highest liquid level. When heat exchange is required, the molten salt pump sends it to a heat exchange device outside the storage equipment for heat exchange. At this time, the liquid level begins to drop to the lowest level. After the heat exchange is completed, the liquid level will continuously rise back to the highest level. During this process, the liquid level of the molten salt will fluctuate between high and low, and this cycle continues.

[0046] Using the highest or lowest liquid level directly ignores the time weight, leading to control errors (such as unreasonable pump power design) and misjudgment of thermal efficiency (such as deviation of actual average heat storage).

[0047] Therefore, this invention solves this problem using equivalent coefficients. Equivalent coefficients This refers to the percentage of time the molten salt is at high and low liquid levels. If, in a cycle (e.g., 24 hours), the high liquid level lasts for 6 hours and the low liquid level lasts for 6 hours, then... =12 / 24=0.5.

[0048] In this embodiment of the invention, the equivalent coefficient of molten salt level can be set within the range of 0.5 to 0.7, such as 0.5, 0.55, 0.6, 0.65, 0.7, etc., and the specific value can be determined according to the actual situation. This invention does not impose any specific limitations. The optimal value is 0.65.

[0049] Since low liquid levels occur at any time, the equivalent liquid level of this invention... The calculation is as follows: in, This is the lowest liquid level. This is the highest liquid level.

[0050] Based on the equivalent coefficient generated by the time ratio of molten salt at high and low liquid levels, it can overcome the limitations of the traditional method of simply taking the average value. It fully considers the dynamic characteristics of molten salt circulation, accurately captures the liquid level change pattern, and makes the equivalent molten salt liquid level more consistent with the actual operating state. This can help operators to grasp the real liquid level of the molten salt system in a timely and accurate manner, and predict potential risks in advance, such as overflow caused by excessive liquid level or dry burning of equipment caused by excessive liquid level. It can effectively avoid the occurrence of abnormal operating conditions and significantly improve the safety and stability of molten salt system operation.

[0051] Regardless of the range of molten salt level changes or the frequency of fluctuations, this calculation method can adapt to different working conditions by flexibly adjusting the equivalent coefficient, ensuring that the equivalent molten salt level calculation results always maintain high accuracy and reliability in complex and ever-changing operating environments.

[0052] In S230, the equivalent molten salt density is calculated based on the molten salt temperature variation range.

[0053] Since the density of molten salt decreases as temperature increases (thermal expansion effect), an equivalent density value is set within the temperature variation range to represent the density value of the actual average thermal properties.

[0054] In some implementations, the calculation of the equivalent molten salt density based on the molten salt temperature variation range can include: Calculate the average temperature within the range of molten salt temperature variation; Obtain the equivalent molten salt density corresponding to the average temperature; Based on the density of the insulation layer 340 and connecting accessories along the entire molten salt storage tank wall, combined with the cantilever length and its own density, an equivalent density coefficient is generated. The equivalent molten salt density is generated by adding the product of the equivalent density coefficient and the density of the insulation layer 340 and connecting accessories along the entire wall of the molten salt storage equipment tank.

[0055] Molten salt storage devices experience continuous temperature fluctuations during operation, and the density of the molten salt changes significantly with temperature. Directly using the instantaneous density corresponding to the dynamic temperature leads to frequent fluctuations in calculation parameters, making it difficult to use for stable structural analyses (such as calculating natural vibration periods). Therefore, by transforming the average temperature over a temperature range into the corresponding equivalent molten salt density, dynamic changes can be converted into static characteristic values. This facilitates the establishment of a stable benchmark suitable for engineering calculations, while preserving the core influence of temperature on density through the average temperature, avoiding accuracy loss due to simplification.

[0056] Molten salt storage equipment is not solely composed of molten salt medium. The insulation layer 340 of the tank wall, connecting accessories, and other structural components, together with the molten salt, constitute the overall vibration system. The mass distribution of these components (such as set density and cantilever length) directly affects the inertial characteristics of the storage equipment, thereby altering its natural period. Traditional calculations that only consider the density of the molten salt itself neglect the contribution of the structurally added mass, leading to a disconnect between the equivalent parameters and the actual vibration state. Therefore, introducing an "equivalent density coefficient" and incorporating the influence of structural components through a superposition formula is to fully capture the total effect of "medium mass + structurally added mass," achieving a comprehensive description of the inertial characteristics of the vibration system.

[0057] During the heat exchange cycle, the temperature field inside the tank varies gradually depending on the different stages of salt inlet and outlet, and the amount of liquid molten salt already present. The density of the liquid molten salt also varies at different temperatures. The density is 1908 kg / m³ at 280℃ and 1710 kg / m³ at 600℃. This invention does not limit the specific value of the equivalent molten salt density. For example, in some embodiments, the equivalent molten salt density can be set to a range of 0.15 to 0.2. Specifically, it can be 0.150, 0.155, 0.160, 0.165, 0.170, 0.175, 0.180, 0.185, 0.190, 0.195, or 0.20. Preferably, it is 0.175.

[0058] Based on this, the formula for calculating the equivalent molten salt density is: in, This represents the equivalent molten salt density at an average temperature of 520℃. This indicates the density of the insulation layer 340 and connecting accessories along the entire wall of the molten salt storage tank.

[0059] By calculating the average temperature within the temperature variation range of molten salt and obtaining the equivalent molten salt density corresponding to that average temperature, the characteristics of molten salt density changing with temperature are fully considered. Compared with the density value at a single temperature, it can more realistically reflect the density state of molten salt under actual working conditions, and greatly improve the accuracy of equivalent molten salt density calculation.

[0060] By combining the density of the insulation layer 340 and connecting accessories along the entire molten salt storage tank wall, the cantilever length, and the density of the equivalent density coefficient, the structural factors of the storage equipment are incorporated into the calculation system. This avoids the drawback of focusing only on the molten salt itself while ignoring the influence of the surrounding structure on the overall density. As a result, the calculation results of the equivalent molten salt density can comprehensively reflect the comprehensive physical characteristics of the molten salt storage equipment system, providing a more reliable data basis for subsequent mechanical analysis and structural design.

[0061] The equivalent molten salt density generated by this calculation method fully considers various parameters in actual engineering and fits the actual operating scenario of molten salt storage equipment. It can effectively guide the design, selection, and safety assessment of molten salt storage equipment, reduce design errors and engineering risks caused by inaccurate density calculations, reduce engineering costs, and improve the efficiency and safety of engineering construction and operation.

[0062] In S240, the equivalent mid-radius is calculated based on the amount of expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation.

[0063] From the perspective of the operational characteristics of molten salt storage equipment, it is not in a static state, but rather undergoes a transition from construction completion to stable operation, as well as daily high and low liquid level cycles. During the transition phase, there are differences between the initial salt inlet temperature and the temperature after preheating, and between the temperature after preheating and the temperature after construction. This temperature difference causes a one-time, tending-to-stabilize expansion and contraction of the outer diameter of the storage equipment. This is a crucial characteristic of the storage equipment transitioning from the "construction state" to the "stable operating state." Ignoring this will lead to deviations in the judgment of the basic dimensions of the molten salt storage equipment during stable operation. In daily cycles, the molten salt temperature difference caused by switching between high and low liquid levels is periodic, causing the outer diameter to repeatedly expand and contract. This dynamic deformation is a high-frequency characteristic of the storage equipment's daily operation; ignoring it will prevent calculations from reflecting the actual dimensional changes of the storage equipment during operation.

[0064] From the perspective of the interaction between structure and heat, temperature changes significantly affect the structural dimensions of storage devices under high-temperature environments. The coefficient of linear expansion of a material is an inherent property that determines the degree of dimensional change with temperature variations. Incorporating it into the calculation of the radius coefficient in cyclic states allows for precise quantification of the impact of periodic temperature changes on the outer diameter of the storage device, demonstrating a profound understanding of the relationship between material properties and temperature deformation. Simultaneously, the 340mm thickness of the insulation layer affects the temperature distribution of the tank wall, thus altering the amount of expansion and contraction. Including this in the calculation of the equivalent radius allows for a more comprehensive consideration of the impact of additional structural factors on the dimensions of the storage device, making the calculation results more realistic. Therefore, in this embodiment of the invention, reference is made to… Figure 5 As shown, the equivalent mid-radius is calculated based on the expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation, including: Based on the temperature difference between the initial temperature during salt introduction and the temperature difference between the molten salt after uniform preheating, the temperature difference between the molten salt after uniform preheating and after construction, and the linear expansion coefficient of the molten salt storage equipment material, the median radius coefficient of the outer wall diameter of the molten salt storage equipment under steady-state conditions is generated. Based on the temperature difference of molten salt during normal circulation high and low liquid level switching and the linear expansion coefficient of the molten salt storage equipment material, the mid-radius coefficient of the outer wall diameter of the molten salt storage equipment under circulation conditions is generated. The equivalent mid-radius is generated based on the initial mid-radius dimension of the molten salt storage device, the 340mm thickness of the insulation layer of the molten salt storage device, the mid-radius coefficient of the outer wall diameter of the molten salt storage device in a steady state, and the mid-radius coefficient of the outer wall diameter of the molten salt storage device in a cyclic state.

[0065] In other words, the equivalent radius is calculated as follows: in, Indicates the initial radius dimension. This indicates that the outer insulation layer is 340mm thick. Represents the radius coefficient in the steady state and , This indicates the temperature difference between the molten salt after uniform preheating and after construction is complete. This indicates the temperature difference between the initial temperature when the salt is introduced and the temperature of the molten salt after uniform preheating. This represents the coefficient of linear expansion of the material used in molten salt storage equipment. Represents the radius coefficient in the cyclic state and , This indicates the temperature difference of the molten salt during the normal cycle when switching between high and low liquid levels.

[0066] Based on the process and flow of preheating hot air in molten salt storage equipment, this invention found that the expansion and deformation are most obvious in this process. Therefore, considering the step-by-step preheating and the influence of the thermal ratchet effect, the preheating equivalence coefficient is taken as 0.80 after comprehensive comparative analysis.

[0067] During the initial salt inlet process, considering the uneven contact between the bottom plate and the tank wall of the storage equipment, as well as the heat loss after the hot salt and the preheated air convection, a comprehensive analysis of a large amount of monitoring data suggests that an equivalent coefficient of 0.60 is reasonable.

[0068] During normal thermal cycling, the molten salt level fluctuates, and the previously stable mid-radius radius is disrupted during this process. Under the influence of the cyclic temperature difference, it may expand or contract. Monitoring data shows that the overall mid-radius dimension increases, but the increase is very limited; therefore, the cyclic equivalence coefficient is taken as 0.30.

[0069] This design transforms complex dynamic processes into quantifiable equivalent parameters. Deformations in steady-state and cyclic states are quantified into mid-radius coefficients, which are then integrated with the initial mid-radius dimensions to form a single equivalent mid-radius. This simplifies the calculation process and comprehensively reflects the dimensional characteristics of the storage device throughout its entire lifecycle. It provides reliable geometric parameter support for the subsequent calculation of key parameters such as the equivalent natural vibration period of the molten salt storage device, meeting the requirements for data accuracy and practicality in engineering design. It also demonstrates a precise understanding of the "thermal-structural" coupling characteristics of high-temperature molten salt storage devices, providing a more scientific basis for engineering analyses such as wind loads and seismic effects.

[0070] In S250, a correction factor is calculated based on the equivalent molten salt level and the equivalent mid-radius.

[0071] The natural vibration period value is obtained by performing a large number of modal analyses using a finite element parametric model. This value is then compared with the calculated value from the formula of this invention. The results are then continuously fitted and corrected to provide the correction coefficients corresponding to the calculation formula of this invention.

[0072] The correction factor is calculated as follows: in, This is the equivalent molten salt level. It is the equivalent mid-radius.

[0073] Finite element modal analysis was performed on the storage device using different combinations of parameters: diameter, height, liquid level, and insulation layer thickness. The fitted curves were then compared with reference values. Figure 6 As shown in Table 1, the fitted data are referenced.

[0074] Table 1 Therefore, within the common capacity range of molten salt storage equipment (10000m3~20000m3), the calculation results of the natural vibration period formula of molten salt storage equipment proposed in this invention are similar to the period results obtained by finite element calculation, with small errors, which are within an acceptable range, thus verifying the effectiveness of the natural vibration period formula of molten salt storage equipment proposed in this invention.

[0075] In S260, the equivalent natural period of the molten salt storage device is calculated based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient.

[0076] In other words, the equivalent natural period of the molten salt storage device is calculated based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient. include: in, This represents the correction factor. Indicates the equivalent mid-radius. Indicates the equivalent molten salt density. Indicates the equivalent molten salt level. This indicates the elastic modulus of the material used in molten salt storage equipment. This indicates the wall thickness of a molten salt storage device located at a height of 1 / 3 tank.

[0077] Taking a molten salt thermal storage high-temperature tank in a certain project as an example, the thickness of the bottom edge plate is 22mm, the thickness of the transition web plate is 16mm, and the thickness of the middle web plate is 10mm; the diameter of the storage equipment is 25m, corresponding to an initial mid-radius of 12.515m, and the total height of the wall panels is 12.5m, divided into 6 layers. The wall thickness from bottom to top is 30mm, 25mm, 19mm, 14mm, 12mm, and 12mm respectively, with the wall thickness at 1 / 3 of the tank height being... (When located at the junction of the two tank walls, the average thickness of the two tank walls is taken). The designed maximum liquid level is 11.5m, and the minimum liquid level is 1.3m. After the storage equipment is built and installed, the ambient temperature is 20℃, and the temperature after uniform preheating is 350℃, ΔT1=320℃. The initial temperature when salt is introduced is 450℃, so the corresponding ΔT2=100℃. The temperature at the maximum liquid level is 565℃, and the temperature at the minimum liquid level is 475℃. Therefore, the temperature difference of the molten salt in the tank during normal circulation high and low liquid level switching is ΔT3=90℃. The hot tank material is T347H, with a corresponding elastic modulus of Es=151GPa and a linear expansion coefficient α=18.71×10. -6 ℃ -1 The external insulation layer 340 uses aluminum silicate board with a thickness of 800mm. The equivalent molten salt density ρ at a uniform temperature of 520℃ is 1757kg / m³. 3 The combined density of the insulation and its connecting accessories is 558 kg / m³. 3 .

[0078] The overall boundary conditions of this storage device satisfy the prerequisites of the equivalent natural vibration period calculation formula of this invention.

[0079] Therefore, the equivalent molten salt salt level is: Equivalent molten salt density: Radius coefficient in steady state: Radius coefficient in the loop state: The equivalent mid-radius is: Correction factor: Equivalent natural period: The calculation results of the natural vibration period of the molten salt high-temperature storage equipment in this example are compared with the calculation results of conventional storage equipment and the results of finite element modal analysis, as shown in Table 2.

[0080] Table 2 The equivalent natural period of the molten salt storage device was calculated using the formula for the equivalent natural period of the molten salt storage device proposed in this invention. The calculated equivalent natural period of the molten salt storage device was 0.1571s. A finite element model corresponding to the storage device was established, and the calculated natural period was 0.1661s with an error of 5.41%, which verified the effectiveness of the invention.

[0081] This invention provides a method for calculating the equivalent natural vibration period, specifically targeting high-temperature molten salt thermal storage tanks. Based on the characteristics of their heat exchange cycle, the dynamic cyclic process is approximated as an equivalent static state. Extensive monitoring and numerical simulation work provides relevant equivalent parameters, ensuring the comprehensiveness and accuracy of the calculation formulas. This method for calculating the equivalent natural vibration period overcomes the limitations of conventional calculation methods for storage equipment, offering greater specificity and accuracy, and providing scientific and reasonable data support for wind loads, seismic effects, and engineering design.

[0082] According to a second aspect of the present invention, a calculation device 700 for the equivalent natural period of a molten salt storage device is also provided, with reference to... Figure 7 As shown, the device for calculating the equivalent natural period of the molten salt storage equipment includes: The data acquisition module 710 is used to acquire the dynamic operating parameters of the molten salt storage equipment, including the range of molten salt level change, the range of molten salt temperature change, and the amount of expansion and contraction of the outer wall diameter of the molten salt storage equipment under temperature change. The liquid level calculation module 720 is used to calculate the equivalent molten salt liquid level based on the range of molten salt liquid level changes. The density calculation module 730 is used to calculate the equivalent molten salt density based on the molten salt temperature variation range. The radius calculation module 740 is used to calculate the equivalent mid-radius based on the amount of expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation. The coefficient calculation module 750 is used to calculate the correction coefficient based on the equivalent molten salt level and the equivalent mid-radius. The period calculation module 760 is used to calculate the equivalent natural vibration period value of the molten salt storage device based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient.

[0083] It should be noted that although several modules of the calculation device for the equivalent natural period of the molten salt storage device have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more modules or sub-modules described above can be embodied in one module or unit. Conversely, the features and functions of one module or sub-module described above can be further divided into multiple modules or sub-modules for embodiment.

[0084] Furthermore, in an exemplary embodiment of the present invention, an electronic device capable of implementing the above-described method for calculating the equivalent natural period of a molten salt storage device is also provided.

[0085] Those skilled in the art will understand that various aspects of the present invention can be implemented as systems, methods, or program products. Therefore, various aspects of the present invention can be specifically implemented as entirely hardware embodiments, entirely software embodiments (including firmware, microcode, etc.), or embodiments combining hardware and software aspects, collectively referred to herein as “circuit,” “module,” or “system.”

[0086] The following reference Figure 8 To describe an electronic device 800 according to such an embodiment of the present invention. Figure 8 The electronic device 800 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of the present invention.

[0087] like Figure 8 As shown, the electronic device 800 is presented in the form of a general-purpose computing device. The components of the electronic device 800 may include, but are not limited to: at least one processing unit 810, at least one storage unit 820, a bus 830 connecting different system components (including storage unit 820 and processing unit 810), and a display unit 840.

[0088] The storage unit stores program code that can be executed by the processing unit 810, causing the processing unit 810 to perform the steps described in the "Exemplary Method" section above, according to various exemplary embodiments of the present invention. For example, the processing unit 710 can perform actions such as... Figure 2 S210: Obtain the dynamic operating parameters of the molten salt storage device, including the range of molten salt level changes, the range of molten salt temperature changes, and the amount of expansion and contraction of the outer wall diameter of the molten salt storage device under temperature changes; S220: Calculate the equivalent molten salt level based on the range of molten salt level changes; S230: Calculate the equivalent molten salt density based on the range of molten salt temperature changes; S240: Calculate the equivalent mid-radius based on the amount of expansion and contraction of the outer wall diameter of the molten salt storage device within the range of molten salt level changes; S250: Calculate the correction coefficient based on the equivalent molten salt level and the equivalent mid-radius; S260: Calculate the equivalent natural period value of the molten salt storage device based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient.

[0089] Storage unit 820 may include readable media in the form of volatile storage units, such as random access memory (RAM) 821 and / or cache memory 822, and may further include read-only memory (ROM) 823.

[0090] Storage unit 820 may also include a program / utility 824 having a set (at least one) of program modules 725, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0091] Bus 830 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0092] Electronic device 800 can also communicate with one or more external devices 870 (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with the electronic device 800, and / or with any device that enables the electronic device 800 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 850. Furthermore, electronic device 800 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 860. Figure 8 As shown, network adapter 860 communicates with other modules of electronic device 800 via bus 830. It should be understood that, although... Figure 8 As not shown in the diagram, other hardware and / or software modules may be used in conjunction with the electronic device 800, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0093] Through the description of the above embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions of the embodiments of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, portable hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, terminal device, or network device, etc.) to execute the methods according to the embodiments of the present invention.

[0094] In exemplary embodiments of the present invention, a computer-readable storage medium is also provided, on which a program product capable of implementing the methods described above is stored. In some possible embodiments, various aspects of the present invention may also be implemented as a program product comprising program code, which, when the program product is run on a terminal device, causes the terminal device to perform the steps of the various exemplary embodiments of the present invention described in the "Exemplary Methods" section above.

[0095] refer to Figure 9 As shown, a program product 900 for calculating the equivalent natural period of the molten salt storage device according to an embodiment of the present invention is described. This product can be a portable compact disc read-only memory (CD-ROM) and includes program code, and can run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto. In the present invention, the readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0096] The program product may employ any combination of one or more readable storage media. Readable storage media may be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0097] Program code for performing the operations of this invention can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0098] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0099] Through the description of the above embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions of the embodiments of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, portable hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, touch terminal, or network device, etc.) to execute the methods according to the embodiments of the present invention.

[0100] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

[0101] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for calculating the equivalent natural period of a molten salt storage device, characterized in that, include: Acquire dynamic operating parameters of the molten salt storage equipment, including the range of molten salt level changes, the range of molten salt temperature changes, and the amount of expansion and contraction of the outer diameter of the molten salt storage equipment under temperature changes; Calculate the equivalent molten salt level based on the range of molten salt level variation; Calculate the equivalent molten salt density based on the molten salt temperature variation range; Calculate the equivalent mid-radius based on the amount of expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation; Calculate the correction factor based on the equivalent molten salt level and the equivalent mid-radius; The equivalent natural period of the molten salt storage device is calculated based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient.

2. The method for calculating the equivalent natural period of a molten salt storage device according to claim 1, characterized in that, The calculation of the equivalent molten salt level based on the range of molten salt level variation includes: Based on the proportion of time spent at the intermediate liquid level during normal molten salt circulation, an equivalent coefficient for molten salt level is generated, where the intermediate liquid level is the liquid level located between the highest and lowest liquid levels. Obtain the highest and lowest liquid level values ​​within the range of molten salt liquid level variation; Calculate the liquid level difference between the highest and lowest liquid level values; The equivalent molten salt level is generated by adding the product of the liquid level difference and the molten salt level equivalence coefficient to the lowest liquid level value.

3. The method for calculating the equivalent natural period of a molten salt storage device according to claim 2, characterized in that, The equivalent coefficient of the molten salt level is 0.5~0.

7.

4. The method for calculating the equivalent natural period of a molten salt storage device according to claim 1, characterized in that, The calculation of the equivalent molten salt density based on the molten salt temperature variation range includes: Calculate the average temperature within the range of molten salt temperature variation; Obtain the equivalent molten salt density corresponding to the average temperature; Based on the density of the insulation layer and connecting accessories along the entire molten salt storage tank wall, combined with the cantilever length and its own density, an equivalent density coefficient is generated; The equivalent molten salt density is generated by adding the product of the equivalent density coefficient and the density of the insulation layer and connecting accessories along the entire wall of the molten salt storage equipment tank.

5. The method for calculating the equivalent natural period of a molten salt storage device according to claim 4, characterized in that, The equivalent density coefficient is 0.15~0.

2.

6. The method for calculating the equivalent natural period of a molten salt storage device according to claim 1, characterized in that, The equivalent mid-radius is calculated based on the expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation, including: Based on the temperature difference between the initial temperature during salt introduction and the temperature difference between the molten salt after uniform preheating, the temperature difference between the molten salt after uniform preheating and after construction, and the linear expansion coefficient of the molten salt storage equipment material, the median radius coefficient of the outer wall diameter of the molten salt storage equipment under steady-state conditions is generated. Based on the temperature difference of molten salt during normal circulation high and low liquid level switching and the linear expansion coefficient of the molten salt storage equipment material, the mid-radius coefficient of the outer wall diameter of the molten salt storage equipment under circulation conditions is generated. The equivalent mid-radius is generated based on the initial mid-radius dimension of the molten salt storage device, the insulation layer thickness of the molten salt storage device, the mid-radius coefficient of the outer wall diameter of the molten salt storage device in a steady state, and the mid-radius coefficient of the outer wall diameter of the molten salt storage device in a cyclic state.

7. The method for calculating the equivalent natural period of a molten salt storage device according to claim 1, characterized in that, Based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient, the equivalent natural period of the molten salt storage device is calculated. include: in, This represents the correction factor. Indicates the equivalent mid-radius. Indicates the equivalent molten salt density. Indicates the equivalent molten salt level. This indicates the elastic modulus of the material used in molten salt storage equipment. This indicates the wall thickness of a molten salt storage device located at a height of 1 / 3 tank.

8. A device for calculating the equivalent natural period of a molten salt storage device, characterized in that, The method for calculating the equivalent natural period of a molten salt storage device according to any one of claims 1-7 includes: The data acquisition module is used to acquire the dynamic operating parameters of the molten salt storage equipment, including the range of molten salt level changes, the range of molten salt temperature changes, and the amount of expansion and contraction of the outer wall diameter of the molten salt storage equipment under temperature changes. The liquid level calculation module is used to calculate the equivalent molten salt liquid level based on the range of molten salt liquid level changes. The density calculation module is used to calculate the equivalent molten salt density based on the molten salt temperature variation range. The radius calculation module is used to calculate the equivalent mid-radius based on the expansion and contraction deformation of the outer wall diameter of the molten salt storage device within the range of molten salt level variation. The coefficient calculation module is used to calculate the correction coefficient based on the equivalent molten salt level and the equivalent mid-radius. The period calculation module is used to calculate the equivalent natural vibration period value of the molten salt storage device based on the equivalent molten salt level, the equivalent molten salt density, the equivalent mid-radius, and the correction coefficient.

9. An electronic device, comprising: processor; as well as A memory storing computer-readable instructions, which, when executed by the processor, implement the method for calculating the equivalent natural period of the molten salt storage device as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for calculating the equivalent natural period of a molten salt storage device as described in any one of claims 1 to 7.

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