A method for studying the protection of oil storage facilities

Abstract

The application provides a kind of oil storage facility protection research method, and relates to the technical field of oil storage tank research.The application takes vertical steel oil tank and other oil storage facilities as application scene, studies composite material, establishes the constitutive model of composite material, combines simulation characterization means to find out the structure performance relationship, carries out the adaptability research of composite structure in oil storage equipment, anti-vibration protection research and application research;Propose the protection report of multi-layer composite structure in tank bottom and pool bottom, provide technical support for safe and stable operation of oil storage facilities.Through the macroscopic and microscopic multi-scale structure design of material, the composite material is formed for oil storage facilities, and the safety and reliability of oil tank and other bottom replacement engineering are improved.The technical scheme of the application can be used to guide the reconstruction, repair and construction project of oil storage facilities such as vertical steel oil tank in cave warehouse, can significantly shorten the construction period of oil tank bottom replacement engineering, the tank capacity loss is small, the safety hidden danger of welding open flame is reduced, the safety risk of vertical oil tank is greatly reduced, and the use convenience is improved.

Description

A research method for the protection of oil storage facilities Technical Field

[0001] This invention relates to the field of oil storage tank safety protection technology, and in particular to a research method for the protection of oil storage facilities. Background Technology

[0002] An oil tank is a container for storing oil products and is a major facility in an oil depot. Oil tanks can be broadly classified into two categories based on their material: non-metallic oil tanks and metallic oil tanks. Metallic oil tanks are the most commonly used, while non-metallic oil tanks are generally only used in field oil depots. These include oil-resistant rubber flexible tanks, fiberglass tanks, and plastic tanks. The inherent disadvantages of oil tanks are as follows: the tank bottom plate is subject to double-sided corrosion, greatly increasing the probability of corrosion perforation; there are limited methods or means for real-time monitoring of oil leakage at the tank bottom plate, making it difficult to detect minor leaks or delays in detection; after oil is stored, the lower tank wall is subjected to significant pressure, making it prone to rupture. If a sudden rupture occurs at a high liquid level, it will inevitably destroy the firewall, causing all oil to leak out. When the uncontrolled overflowing oil encounters a source of ignition, it will create a large-scale fire.

[0003] Oil storage facilities are a crucial component of energy security, bearing the dual mission of protecting and developing the nation. As an important part of both the war defense and support systems, the protection of oil storage facilities faces new challenges. Currently, the common maintenance method is bottom replacement, which suffers from long construction periods, high costs, significant safety hazards from open flame welding, and difficulty in locating leaks, posing challenges to oil supply. Therefore, providing reliable technical support for the survival and safety of protective engineering is a crucial research direction. Among these, research on multi-layered structural coupling technology is essential to provide more advanced and reliable solutions for the renovation of vertical oil tanks and other oil storage facilities, enhancing storage and safe operation capabilities—a practical necessity for improving facility protection. Therefore, this invention proposes a research method for oil storage facility protection to address the problems existing in current technologies. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a research method for the protection of oil storage facilities. This method employs integrated structural and functional technologies to construct novel composite materials with multi-scale and multi-functional characteristics. It combines numerical simulation and other methods to explore the structure-property relationship and mechanism of action, and verifies the reliability through real-world scenarios. This method can provide technical support for the safe and stable operation of oil storage facilities during wartime.

[0005] To achieve the objectives of this invention, the invention is implemented through the following technical solution: a research method for the protection of oil storage facilities, comprising the following steps:

[0006] Step 1: Addressing the issues of oil storage facility protection and tank bottom corrosion, a structural-functional integrated technology is adopted. Using glass fiber felt and carbon fiber three-dimensional woven fabric as the main materials, combined with stitching and numerical simulation methods, a multi-layered structural coupling integrated composite material is designed and constructed as the tank bottom support.

[0007] Step 2: Study the multi-layer structure to obtain the multi-scale distribution law of macroscopic and microscopic structure, study the functionality of multi-layer structure, and form composite material preparation process and samples;

[0008] Step 3: With the goal of simulating the stress distribution of composite materials and analyzing the mechanical properties across the entire field, a three-dimensional model is constructed using a computer development platform to conduct numerical simulations and obtain the material's characteristics.

[0009] Step 4: Study the mechanical response, strength characteristics, and damage initiation and development process of the composite material to obtain regular insights to guide the construction of composite material samples;

[0010] Step 5: Study the dynamic performance of the vertical cylindrical storage tank structure, analyze the interaction between the tank and the fluid, the tank and the foundation, and the dynamic response of the tank under the action of explosion vibration;

[0011] Step Six: Conduct a comprehensive examination of the actual performance of the composite material. Using a vertical oil tank as an application scenario, examine the actual performance of the constructed composite material and study its characteristics and protection under various working conditions.

[0012] A further improvement is that the specific method for designing and constructing the multi-layered structure-coupled integrated composite material in step one includes: using three-dimensional carbon fiber braided fabric as the middle layer and glass fiber mat as the reinforcing layer to construct a glass fiber, carbon fiber, and glass fiber sandwich structure of layup material; and using a puncture and stitching method to connect the sandwich structure of layup material to form a multi-layered structure-coupled integrated composite material.

[0013] Further improvements are made in the following: In step two, the study of the multi-layer structure specifically involves studying the material properties, the base plate, the reinforcing layer, and the void layer.

[0014] Further improvements are made in the following aspects: The specific method of step three includes: based on the hybrid law, bridging theory and finite element theory, a finite element method suitable for mechanical analysis of multilayer coupled integrated composite materials is formed to obtain the full-field displacement, strain and stress response characteristics of multilayer coupled integrated composite materials.

[0015] A further improvement is that, in step four, the method for obtaining regularity knowledge also includes: revealing the material damage mechanism, evaluating material performance, and providing feedback on the engineering structural design and optimization of composite materials to obtain regularity knowledge.

[0016] Further improvements are made in step five, which specifically involves: studying the principles of elastoplastic finite element analysis and the classical theory of tank vibration response analysis; determining the elastoplastic constitutive relationship suitable for the foundation-tank-fluid structure system; establishing a numerical analysis model of the tank dynamic interaction of the foundation-tank-fluid structure system using ANSYS; and establishing a solution using the finite element method, including determining the transient dynamic equation solution method, selecting elements, vibration input method, mesh size division, realization of fluid-structure interaction, and contact analysis between the foundation and the tank.

[0017] A further improvement is made in step five, where the method for analyzing the dynamic response of the storage tank under the action of explosion vibration is as follows: finite element models of two storage tank systems with different heights are established, and the response of the vertical oil tank under horizontal vibration load is studied using the finite element dynamic time history analysis method. The stress cloud diagram of the storage tank under the action of explosion vibration is obtained, and the vibration response of the high tank and the low tank is analyzed and compared.

[0018] Further improvements are made in the following steps: In step six, the actual performance of the constructed composite material is examined, including its microstructure, molecular structure, interlaminar fracture toughness, impact toughness, interlaminar shear, longitudinal tension, longitudinal compression, full-field strain measurement, thermal conductivity, ultrasonic CT scanning, three-dimensional X-ray detection, and salt spray test. Material structure design and sample preparation are also carried out.

[0019] Further improvements are made in the following aspects: In step six, studying its characteristics and protection under various working conditions specifically includes: preparing composite material samples, taking a vertical oil tank as the application scenario, examining the actual performance of the constructed composite material, studying its adaptability and functionality under various working conditions, verifying the effectiveness of the multi-layer composite structure, proposing a report on the protection of the multi-layer composite structure in different scenarios, and analyzing its economic efficiency.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. This invention takes vertical steel oil tanks and other oil storage facilities as the application scenario, studies composite materials, establishes a constitutive model of composite materials, and explores the relationship between structural performance using simulation characterization methods. It conducts research on the adaptability, vibration protection, and application of composite structures in oil storage equipment. It also proposes a report on the protection of multi-layer composite structures at the bottom of tanks and pools, which can be used in oil storage facilities to improve the safety performance of oil storage facilities and provide technical support for the safe and stable operation of oil storage facilities.

[0022] 2. This invention focuses on the safety and reliability of oil storage, and conducts coupled technology research. Through macroscopic and microscopic multi-scale structural design of materials, composite materials are formed for use in oil storage facilities, aiming to improve the safety, reliability, and engineering adaptability of bottom replacement projects such as oil tanks, and ensure the safety of oil storage.

[0023] 3. The research results of this invention can be used to guide the routine renovation and emergency repair and construction of oil storage facilities such as underground vertical steel oil tanks. It can significantly shorten the construction cycle of oil tank bottom replacement projects, minimize tank capacity loss, reduce the safety hazards of open flame welding, greatly reduce the safety risks of existing vertical oil tanks, and improve the convenience of use. Attached Figure Description

[0024] Figure 1 is a flowchart of the present invention;

[0025] Figure 2 is a schematic diagram of the multilayer structure coupled integrated composite material of the present invention. Detailed Implementation

[0026] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0027] Example 1

[0028] As shown in Figures 1 and 2, this embodiment proposes a research method for the protection of oil storage facilities, including the following steps:

[0029] Step 1: Addressing the issues of oil storage facility protection and tank bottom corrosion, a structural-functional integrated technology is adopted. Using glass fiber felt and carbon fiber three-dimensional woven fabric as the main materials, combined with stitching and numerical simulation methods, a multi-layered structural coupling integrated composite material is designed and constructed as the tank bottom support.

[0030] Step 2: Study the multi-layer structure to obtain the multi-scale distribution law of macroscopic and microscopic structure, study the functionality of multi-layer structure, and form composite material preparation process and samples;

[0031] Step 3: With the goal of simulating the stress distribution of composite materials and analyzing the mechanical properties across the entire field, a three-dimensional model is constructed using a computer development platform to conduct numerical simulations and obtain the material's characteristics.

[0032] Step 4: Study the mechanical response, strength characteristics, and damage initiation and development process of the composite material to obtain regular insights to guide the construction of composite material samples;

[0033] Step 5: Study the dynamic performance of the vertical cylindrical storage tank structure, analyze the interaction between the tank and the fluid, the tank and the foundation, and the dynamic response of the tank under the action of explosion vibration;

[0034] Step Six: Conduct a comprehensive examination of the actual performance of the composite material. Using a vertical oil tank as an application scenario, examine the actual performance of the constructed composite material and study its characteristics and protection under various working conditions.

[0035] Example 2

[0036] As shown in Figures 1 and 2, this embodiment proposes a research method for the protection of oil storage facilities, including the following steps:

[0037] Addressing the challenges of oil storage facility protection and tank bottom corrosion, this study employs a structural-functional integrated technology, using glass fiber mat and three-dimensional carbon fiber woven fabric as primary materials. Combining advanced techniques such as stitching and numerical simulation, a novel multi-layered, coupled, integrated composite material is designed and constructed. The key component is three-dimensional carbon fiber woven fabric as the intermediate layer and glass fiber mat as the reinforcing layer, constructing a glass fiber, carbon fiber, and glass fiber sandwich structure. This sandwich structure is then connected using a puncture-stitching method to form a multi-layered, coupled, integrated composite material. The study investigates the multi-layered composite structure, examining material properties, the base plate, the reinforcing layer, and the void layer to obtain the multi-scale distribution patterns of the macroscopic and microscopic structures. The functionality of the multi-layered composite structure is also investigated, leading to the development of composite material preparation processes and samples.

[0038] Constitutive models, also known as the mechanical constitutive equations of materials or stress-strain models of materials, are mathematical expressions describing the mechanical properties (stress-strain-strength-time relationship) of materials. The stress-strain relationship of materials is very complex, exhibiting nonlinearity, viscoelasticity-plasticity, dilatation, and anisotropy. Furthermore, stress level, stress history, and the material's composition, state, and structure all influence it. Therefore, with the goal of simulating the stress distribution and analyzing the full-field mechanical properties of composite materials, a three-dimensional model is constructed using a computer development platform to conduct numerical simulations. Based on the hybrid law, bridging theory, and finite element theory, a finite element method suitable for the mechanical analysis of multilayer coupled integrated composite materials is developed. This method obtains the full-field displacement, strain, and stress response characteristics of multilayer coupled integrated composite materials, studies the mechanical response, strength characteristics, and damage initiation and development processes of three-dimensional composite materials, reveals the material damage mechanism, evaluates material performance, provides feedback for the engineering structural design and optimization of three-dimensional composite materials, obtains regular insights, and guides the construction of high-performance composite material samples.

[0039] This invention primarily studies the dynamic performance of vertical cylindrical storage tank structures, analyzing the interaction between the tank and fluid, and between the tank and the foundation under explosive vibration, as well as the dynamic response of the tank. It investigates the principles of elastoplastic finite element analysis and classical theories of tank vibration response analysis, determining a suitable elastoplastic constitutive relation for the foundation-tank-fluid structure system. A numerical analysis model of the dynamic interaction of the foundation-tank-fluid structure system is established using ANSYS, establishing a solution using the finite element method. This solution includes determining the transient dynamic equation solution method, element selection, vibration input method, mesh size division, realization of fluid-structure interaction, and contact analysis between the foundation and the tank. Finite element models of two tank systems with different heights are established, and the response of the vertical oil tank under horizontal vibration loads is studied using the finite element dynamic time history analysis method. Stress cloud diagrams of the tank under explosive vibration are obtained, and the vibration responses of tall and short tanks are analyzed and compared.

[0040] This invention employs multiple methods to comprehensively examine the actual performance of novel composite materials. These performance parameters include microstructure, molecular structure, interlaminar fracture toughness, impact toughness, interlaminar shear, longitudinal tension, longitudinal compression, full-field strain measurement, thermal conductivity, ultrasonic CT scanning, three-dimensional X-ray detection, and salt spray testing. Material structure design and sample preparation are also conducted. Under optimal process conditions, composite material samples are formed. Using a vertical oil tank as an application scenario, the actual performance of the constructed composite material is examined, its adaptability and functionality under various working conditions are studied, the effectiveness of the multilayer composite structure is verified, a report on the protective performance of the multilayer composite structure in different scenarios is presented, and the economic efficiency is analyzed.

[0041] This invention, based on the protection requirements of oil storage facilities, takes vertical steel oil tanks and other oil storage facilities as application scenarios. It studies novel composite materials, establishes a constitutive model of the composite material, and uses simulation and characterization methods to explore the structural performance relationship. It conducts adaptability, vibration protection, and application research of multi-layer composite structures in oil storage equipment. A report on the protection of tank bottoms and pool bottoms using multi-layer composite structures is presented. The developed multi-layer composite structure, used in oil storage facilities, can improve the safety performance of oil storage facilities and provide technical support for the safe and stable operation of oil storage facilities. This invention focuses on the safety and reliability issues of oil storage, conducting coupled technology research. Through macroscopic and microscopic multi-scale structural design of materials, a novel composite material with a multi-layer composite structure is formed for use in oil storage facilities. The research aims to achieve breakthroughs in improving the safety, reliability, and engineering adaptability of bottom replacement projects such as oil tanks, ensuring the safety of oil storage, and has significant practical significance for the development and improvement of protection technology. Meanwhile, the research findings can be used to guide the routine renovation and emergency repair and construction of oil storage facilities such as vertical steel oil tanks in underground bunkers. It can significantly shorten the construction cycle of oil tank bottom replacement projects, minimize tank volume loss, reduce the safety hazards of open flame welding, greatly reduce the safety risks of existing vertical oil tanks, improve ease of use, and has broad application value.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A research method for the protection of oil storage facilities, characterized in that, Taking vertical steel oil tanks as an application scenario, this study investigates composite materials, establishes a constitutive model of the composite material, and uses simulation characterization methods to explore the structural performance relationship. The study focuses on the adaptability, vibration protection, and application of composite structures in oil storage equipment, including the following steps: Step 1: Addressing the protection of oil storage facilities and tank bottom corrosion issues, a structural-functional integrated technology is adopted. Using glass fiber felt and carbon fiber three-dimensional braided fabric as the main materials, combined with stitching and numerical simulation methods, a multi-layered coupled integrated composite material is designed and constructed as the tank bottom support; Step 2: The multi-layered structure is studied to obtain the multi-scale distribution law of macroscopic and microscopic structures, and the multi-layered structure is investigated. The process involves: 1) Structural functionality, forming composite material preparation processes and samples; 2) Simulating stress distribution and analyzing full-field mechanical properties of the composite material, using a computer development platform to construct a three-dimensional model for numerical simulation to obtain material characteristics; 3) Studying the mechanical response, strength characteristics, and initial and developmental damage processes of the composite material to gain insights into patterns that guide composite material sample construction; 4) Investigating the dynamic performance of the vertical cylindrical storage tank structure, analyzing the interaction between the tank and fluid, and between the tank and the foundation under explosion vibration, as well as the tank's dynamic response; specifically, step five involves studying the principles of elastoplastic finite element analysis and... The classical theory of tank vibration response analysis is used to determine the elastoplastic constitutive relation suitable for the foundation-tank-fluid structure system. A numerical analysis model of the tank's dynamic interaction with the foundation-tank-fluid structure system is established using ANSYS. A finite element method solution is established, including the determination of the transient dynamic equation solution method, element selection, vibration input method, mesh size, realization of fluid-structure interaction, and contact analysis between the foundation and the tank. In step five, the method for analyzing the dynamic response of the tank under explosion vibration is as follows: finite element models of tank systems with two different heights are established, and the finite element dynamic time history analysis method is used to study... The response of the vertical oil tank under horizontal vibration load is analyzed, and the stress cloud diagram of the tank under explosion vibration is obtained. The vibration response of high tanks and low tanks is analyzed and compared. Step 6: The actual performance of the composite material is comprehensively examined. Taking the vertical oil tank as the application scenario, the actual performance of the constructed composite material is examined, and its characteristics and protection under various working conditions are studied. In Step 6, the study of its characteristics and protection under various working conditions specifically includes: studying its adaptability and functionality under various working conditions, verifying the effectiveness of the multi-layer composite structure, proposing a report on the protection of the multi-layer composite structure in different scenarios, and analyzing its economic efficiency.

2. The research method for the protection of oil storage facilities according to claim 1, characterized in that: The specific method for designing and constructing a multi-layered integrated composite material in step one includes: using three-dimensional carbon fiber braid as the middle layer and glass fiber mat as the reinforcing layer to construct a sandwich structure of glass fiber, carbon fiber, and glass fiber; and using a puncture and stitching method to connect the sandwich structure of the sandwich structure to form a multi-layered integrated composite material.

3. The research method for protecting oil storage facilities according to claim 2, characterized in that: In step two, the study of the multi-layer structure specifically involves studying the material properties, the base plate, the reinforcing layer, and the void layer.

4. The research method for protecting oil storage facilities according to claim 3, characterized in that: The specific methods of step three include: based on the hybrid law, bridging theory and finite element theory, forming a finite element method suitable for the mechanical analysis of multilayer coupled integrated composite materials, and obtaining the full-field displacement, strain and stress response characteristics of multilayer coupled integrated composite materials.

5. The research method for protecting oil storage facilities according to claim 4, characterized in that: In step four, the methods for obtaining regularity knowledge also include: revealing the material damage mechanism, evaluating material performance, and providing feedback on the engineering structural design and optimization of composite materials.

6. The research method for protecting oil storage facilities according to claim 5, characterized in that: In step six, the actual performance of the constructed composite material is examined, including its microstructure, molecular structure, interlaminar fracture toughness, impact toughness, interlaminar shear, longitudinal tension, longitudinal compression, full-field strain measurement, thermal conductivity, ultrasonic CT scan, three-dimensional X-ray detection, and salt spray test. Material structure design and sample preparation are also carried out.

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