Vibration reduction method and system for a ship's fairlead

Abstract

The application provides a vibration reduction method and system for a ship intake, and relates to the technical field of ship control. The method comprises the following steps: obtaining overall vibration intensity values of the ship intake under a current working condition corresponding to a plurality of piezoelectric vibration reduction circuits; each piezoelectric vibration reduction circuit is obtained by combining piezoelectric sheets laid on the inner wall of the ship intake and different numbers of energy dissipation units; determining an optimal piezoelectric vibration reduction circuit corresponding to the current working condition from the plurality of piezoelectric vibration reduction circuits according to the overall vibration intensity values; and reducing the vibration intensity of the ship intake based on the optimal piezoelectric vibration reduction circuit. The application can adaptively adjust the current piezoelectric vibration reduction circuit under different working conditions to the optimal piezoelectric vibration reduction circuit, so that the ship intake can maintain a small vibration intensity under different working conditions, effectively alleviate the structural fatigue problem of the ship intake, has strong applicability, and effectively enhances the vibration reduction effect.

Description

Technical Field

[0001] This invention relates to the field of ship control technology, and in particular to a vibration reduction method and system for ship inlet. Background Technology

[0002] The turbulent flow and poor flow field stability of seawater introduced into the ship's inlet can easily induce vortex-induced vibrations. Severe vibrations can lead to fatigue damage to the inlet structure, thereby affecting the safety and reliability of the ship's propulsion system.

[0003] In related technologies, the flow characteristics of the inlet are generally adjusted by modifying structural design methods such as changing the roughness of the inner wall of the inlet, thereby suppressing vortex-induced vibration and structural fatigue. However, with the increasing diversity of ship operating conditions, the fatigue mitigation effect of traditional methods is relatively limited and cannot meet the vibration reduction requirements of ship inlet structures under multiple operating conditions. Summary of the Invention

[0004] This invention provides a vibration reduction method and system for ship inlets, which solves the shortcomings of existing technologies that use structural design such as changing the roughness of the inner wall of the inlet for vibration reduction, which have poor applicability and limited vibration reduction effect. This invention achieves adaptive vibration reduction for various working conditions and enhances the vibration reduction effect.

[0005] This invention provides a vibration reduction method for a ship's inlet, comprising:

[0006] The overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits under the current operating conditions is obtained; wherein, each of the piezoelectric vibration damping circuits is obtained by combining a piezoelectric sheet laid on the inner wall of the ship's inlet with a different number of energy dissipation units;

[0007] Based on the overall vibration intensity value, the optimal piezoelectric vibration damping circuit corresponding to the current operating condition is determined among the multiple piezoelectric vibration damping circuits.

[0008] Based on the optimal piezoelectric vibration reduction circuit, the vibration intensity at the ship's inlet is reduced.

[0009] According to the present invention, a vibration reduction method for a ship's inlet is provided, wherein obtaining the overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration reduction circuits under the current operating condition includes:

[0010] Based on each preset value, the number of energy-consuming units connected to the piezoelectric element is adjusted respectively;

[0011] Based on the adjustment results, obtain the piezoelectric vibration damping circuits corresponding to each of the preset quantity values;

[0012] Based on multiple vibration sensors, the target vibration intensity value corresponding to each piezoelectric vibration damping circuit is collected; the target vibration intensity value corresponding to each piezoelectric vibration damping circuit is formed by the vibration damping at the ship's inlet by each piezoelectric vibration damping circuit; the multiple vibration sensors are installed at the end of the ship's inlet;

[0013] The target vibration intensity values ​​corresponding to each piezoelectric vibration damping circuit collected by multiple vibration sensors are fused to obtain the overall vibration intensity value at the ship's inlet corresponding to each piezoelectric vibration damping circuit.

[0014] According to the present invention, a vibration reduction method for a ship's inlet is provided, wherein the step of acquiring the target vibration intensity value corresponding to each piezoelectric vibration reduction circuit based on multiple vibration sensors includes:

[0015] Based on each of the vibration sensors, multiple original vibration intensity values ​​corresponding to each of the piezoelectric vibration damping circuits are collected at a preset sampling frequency within a preset time period; each of the original vibration intensity values ​​is formed by the piezoelectric vibration damping circuits reducing the vibration intensity at the ship's inlet at different sampling times within the preset time period; the duration of the preset time period is less than the target duration.

[0016] The average of the multiple original vibration intensity values ​​corresponding to each of the piezoelectric vibration damping circuits is calculated to obtain the target vibration intensity value corresponding to each of the piezoelectric vibration damping circuits collected by each of the vibration sensors.

[0017] According to the present invention, a vibration reduction method for a ship's inlet is provided, wherein determining the optimal piezoelectric vibration reduction circuit corresponding to the current operating condition from among a plurality of piezoelectric vibration reduction circuits based on the overall vibration intensity value includes:

[0018] Determine the minimum overall vibration intensity value among the overall vibration intensity values ​​at the ship's inlet corresponding to the multiple piezoelectric vibration damping circuits;

[0019] The piezoelectric vibration damping circuit corresponding to the minimum overall vibration intensity value among the multiple piezoelectric vibration damping circuits is taken as the optimal piezoelectric vibration damping circuit.

[0020] According to the present invention, a vibration reduction method for a ship's inlet is provided, wherein the vibration intensity at the ship's inlet is reduced based on the optimal piezoelectric vibration reduction circuit, comprising:

[0021] Adjust the current piezoelectric vibration damping circuit under the current operating condition to the optimal piezoelectric vibration damping circuit;

[0022] According to the piezoelectric element in the adjusted current piezoelectric vibration damping circuit, the vibration energy at the ship's inlet is converted into electrical energy, and the electrical energy is transmitted to the energy-consuming unit in the adjusted current piezoelectric vibration damping circuit for the energy-consuming unit to consume the electrical energy.

[0023] The present invention also provides a vibration reduction system for a ship's inlet, comprising:

[0024] The vibration acquisition module is used to acquire the overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits under the current operating conditions; wherein, each of the piezoelectric vibration damping circuits is obtained by combining a piezoelectric sheet laid on the inner wall of the ship's inlet with a different number of energy dissipation units;

[0025] The control module is used to determine the optimal piezoelectric vibration damping circuit corresponding to the current working condition among multiple piezoelectric vibration damping circuits based on the overall vibration intensity value.

[0026] The vibration reduction module is used to reduce the vibration intensity at the ship's inlet based on the optimal piezoelectric vibration reduction circuit.

[0027] According to the present invention, a vibration reduction system for a ship's inlet is provided, wherein the vibration acquisition module includes a plurality of vibration sensors, and the plurality of vibration sensors are installed at the end of the ship's inlet;

[0028] The control module includes a switch controller, which is used to control the number of energy-consuming units connected to the piezoelectric element;

[0029] The switch controller and each of the energy-consuming units are located in the ship's power compartment.

[0030] According to the present invention, a vibration reduction system for a ship's inlet is provided, wherein each energy dissipation unit is formed by two damping diodes connected in parallel with opposite wiring methods and identical structures.

[0031] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the vibration reduction method for a ship's inlet as described above.

[0032] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the vibration reduction method for a ship's inlet as described above.

[0033] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the vibration reduction method for a ship's inlet as described above.

[0034] The vibration reduction method and system for ship inlets provided by this invention obtains the overall vibration intensity value at the ship inlet corresponding to different piezoelectric vibration reduction circuits obtained by combining piezoelectric elements with different numbers of energy-consuming units under different operating conditions. Based on the overall vibration intensity value, the optimal piezoelectric vibration reduction circuit suitable for different operating conditions is determined among multiple piezoelectric vibration reduction circuits. This enables the adaptive adjustment of the current piezoelectric vibration reduction circuit to the optimal piezoelectric vibration reduction circuit under different operating conditions, so that the vibration intensity at the ship inlet can be maintained at a low level under different operating conditions, effectively alleviating the structural fatigue problem of the inlet. It has strong applicability and effectively enhances the vibration reduction effect. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic flowchart of the vibration reduction method for ship inlet provided by the present invention;

[0037] Figure 2 This is one of the structural schematic diagrams of the vibration reduction system for ship inlets provided by the present invention;

[0038] Figure 3 This is a schematic diagram of the deployment of the piezoelectric element provided by the present invention;

[0039] Figure 4 This is a cross-sectional schematic diagram of the water inlet pipe provided by the present invention;

[0040] Figure 5 This is the second structural schematic diagram of the vibration reduction system for ship inlets provided by the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps, units, or modules is not necessarily limited to those explicitly listed, but may include other steps, units, or modules not explicitly listed or inherent to such processes, methods, products, or devices.

[0044] The following is combined with Figure 1 The present invention describes a vibration reduction method for ship inlets.

[0045] like Figure 1 The diagram shown is a flowchart illustrating the vibration reduction method for a ship's inlet provided in this embodiment. The method includes the following steps:

[0046] Step 101: Obtain the overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits under the current operating conditions; wherein, each of the piezoelectric vibration damping circuits is obtained by combining a piezoelectric sheet laid on the inner wall of the ship's inlet with a different number of energy dissipation units;

[0047] The vibration reduction method provided in this application is implemented by a vibration reduction system facing the ship's inlet; such as Figure 2 As shown, the vibration reduction system includes at least a piezoelectric vibration reduction circuit, a vibration sensor, and a switch controller;

[0048] like Figure 3 As shown, vibration sensors are installed at the end of the ship's inlet, and there can be multiple sensors, to monitor the vibration intensity at the ship's inlet in real time.

[0049] like Figure 4 As shown, the piezoelectric vibration damping circuit includes at least one set of piezoelectric sheets laid on the inner wall of the ship's inlet, and multiple energy consumption units distributed in the ship's engine room. The number of energy consumption units is determined by a switch controller installed in the ship's engine room. Specifically, the number of energy consumption units connected to the piezoelectric vibration damping circuit can be adjusted by adjusting the switching state of the connection switch of each energy consumption unit to the piezoelectric vibration damping circuit.

[0050] The maximum number of energy-consuming units that can be connected to the piezoelectric vibration damping circuit can be determined by combining the maximum vibration energy at the ship's inlet, the electrical energy that each energy-consuming unit can consume, and the safety margin. For example, by dividing the electrical energy corresponding to the maximum vibration energy by the electrical energy that each energy-consuming unit can consume, and then adding the safety margin, the maximum number of energy-consuming units that can be connected to the piezoelectric vibration damping circuit can be obtained.

[0051] A piezoelectric element typically consists of a piezoelectric material, a coating layer, and an adhesive. When subjected to stress or strain, the piezoelectric material undergoes expansion and contraction deformation. Due to the positive piezoelectric effect, an alternating voltage is generated in the polarization direction of the piezoelectric material. Therefore, the greater the deformation of the piezoelectric element, the stronger the electric field it generates, and the frequency of the expansion and contraction deformation is the same as the frequency of the alternating electric field. The energy dissipation unit consumes electrical energy to counteract the vibration energy at the ship's inlet. Therefore, the piezoelectric vibration damping circuit formed by the combination of these two components can achieve the purpose of energy dissipation and vibration reduction.

[0052] The energy-consuming unit here can be composed of multiple resistors, or it can be formed by two damping diodes with the same structure but opposite wiring methods connected in parallel. This embodiment does not specifically limit this.

[0053] Optionally, under the current operating conditions, a switch controller can be used to control different numbers of energy consumption units and piezoelectric elements to form different piezoelectric vibration damping circuits according to different preset quantities. When the piezoelectric elements in the different piezoelectric vibration damping circuits vibrate on the inner wall of the ship's inlet, they can be subjected to stress, causing the piezoelectric material to undergo expansion and contraction deformation. Due to the positive piezoelectric effect, an alternating voltage will be generated in the polarization direction of the piezoelectric material, and then the electrical energy will be consumed through multiple energy consumption units in the shunt circuit connected thereto, thereby achieving the purpose of energy consumption and vibration damping of the ship's inlet.

[0054] After each piezoelectric vibration damping circuit completes one energy-consuming vibration reduction cycle, the vibration intensity value at the ship's inlet can be collected at least once by multiple vibration sensors to obtain the overall vibration intensity value at the ship's inlet corresponding to different piezoelectric vibration damping circuits. The overall vibration intensity value at the ship's inlet corresponding to different piezoelectric vibration damping circuits is then transmitted to the switch controller in real time so that the switch controller can determine the optimal piezoelectric vibration damping circuit for the current operating conditions. This ensures that the ship's inlet can maintain the minimum vibration intensity under the current operating conditions, thereby effectively alleviating the fatigue problem of the ship's inlet structure.

[0055] Here, the overall vibration intensity value can be the sum of the vibration intensity values ​​at the ship's inlet collected by multiple vibration sensors, or it can be the average value of the vibration intensity values ​​at the ship's inlet collected by multiple vibration sensors, etc. This embodiment does not specifically limit it in this way.

[0056] Step 102: Based on the overall vibration intensity value, determine the optimal piezoelectric vibration damping circuit corresponding to the current operating condition among the multiple piezoelectric vibration damping circuits;

[0057] Because the piezoelectric material of a piezoelectric element generates charge and / or voltage when subjected to stress or strain (i.e., the positive piezoelectric effect), piezoelectric elements can be attached to structures as transducers to convert the mechanical energy of the vibrating structure into the dielectric energy of the piezoelectric element. This electrical energy is then consumed by an energy-dissipating unit in a connected shunt circuit, thus achieving energy-saving vibration reduction. However, under different stress or strain conditions, the piezoelectric material must be matched with a suitable shunt circuit for the energy-dissipating unit to achieve a good piezoelectric vibration reduction effect. Therefore, to minimize the vibration intensity at the ship's inlet under current operating conditions, the switch controller, after obtaining the overall vibration intensity values ​​at the ship's inlet corresponding to multiple piezoelectric vibration reduction circuits, can compare these values ​​to determine the optimal piezoelectric vibration reduction circuit.

[0058] Step 103: Based on the optimal piezoelectric vibration reduction circuit, reduce the vibration intensity at the ship's inlet.

[0059] Optionally, after determining the optimal piezoelectric vibration damping circuit, the number of energy-consuming units connected to the piezoelectric element can be adjusted to the optimal value through the optimal piezoelectric vibration damping circuit. That is, the current piezoelectric vibration damping circuit under the current operating condition can be adjusted to the optimal piezoelectric vibration damping circuit, thereby adjusting the piezoelectric vibration damping effect of the piezoelectric element. In other words, the electrical energy converted by the piezoelectric element can be offset to the greatest extent so that the vibration intensity at the real-time monitored ship inlet is minimized, thereby effectively alleviating the fatigue problem of the ship inlet structure.

[0060] It should be noted that when the ship's operating conditions change, the automatic control switch controller can be adjusted to the optimal mode according to steps 101-103 above. This optimizes the number of energy-consuming units connected to the piezoelectric element in the optimal piezoelectric vibration damping circuit, thereby obtaining the optimal piezoelectric vibration damping circuit and adjusting the piezoelectric vibration damping effect of the piezoelectric element. This ensures that the piezoelectric element produces a good piezoelectric vibration damping effect, minimizing the vibration intensity at the end of the ship's inlet as monitored in real time. This allows the inlet to maintain a low vibration intensity under different operating conditions of the ship, effectively alleviating the fatigue problem of the ship's inlet structure and improving the safety and reliability of ship operation.

[0061] The vibration reduction method for ship inlets provided in this embodiment obtains the overall vibration intensity value at the ship inlet corresponding to different piezoelectric vibration reduction circuits obtained by combining piezoelectric elements with different numbers of energy-consuming units under different operating conditions. Based on the overall vibration intensity value, the optimal piezoelectric vibration reduction circuit suitable for different operating conditions is determined among multiple piezoelectric vibration reduction circuits. This enables the adaptive adjustment of the current piezoelectric vibration reduction circuit to the optimal piezoelectric vibration reduction circuit under different operating conditions, so that the vibration intensity at the ship inlet can be maintained at a low level under different operating conditions, effectively alleviating the structural fatigue problem of the inlet. It has strong applicability and effectively enhances the vibration reduction effect.

[0062] In some embodiments, obtaining the overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits under the current operating condition includes:

[0063] Based on each preset value, the number of energy-consuming units connected to the piezoelectric element is adjusted respectively;

[0064] Based on the adjustment results, obtain the piezoelectric vibration damping circuits corresponding to each of the preset quantity values;

[0065] Based on multiple vibration sensors, the target vibration intensity value corresponding to each piezoelectric vibration damping circuit is collected; the target vibration intensity value corresponding to each piezoelectric vibration damping circuit is formed by the vibration damping at the ship's inlet by each piezoelectric vibration damping circuit; the multiple vibration sensors are installed at the end of the ship's inlet;

[0066] The target vibration intensity values ​​corresponding to each piezoelectric vibration damping circuit collected by multiple vibration sensors are fused to obtain the overall vibration intensity value at the ship's inlet corresponding to each piezoelectric vibration damping circuit.

[0067] Among them, the multiple preset quantity values ​​are determined based on the maximum number of energy consumption units that can be connected to the piezoelectric vibration damping circuit, such as the maximum number of energy consumption units that can be connected is n; correspondingly, the multiple preset quantity values ​​are divided into 1, 2, ..., n.

[0068] Optionally, because piezoelectric materials must be matched with appropriate energy-dissipating units under different stress or strain conditions to achieve a better piezoelectric vibration reduction effect, the automatic adjustment switch controller changes the number of energy-dissipating units connected in the shunt circuit when the ship's operating conditions change, thereby adjusting the piezoelectric vibration reduction effect of the piezoelectric element to minimize the vibration intensity monitored in real time. The specific adjustment method is as follows:

[0069] When the ship's operating conditions change, the switch controller can control n energy-consuming units. Therefore, the switch controller can change the number of energy-consuming units connected to the shunt circuit, i.e., the number of energy-consuming units connected to the piezoelectric element, based on multiple preset values, i.e., from 1 to n, to obtain the piezoelectric vibration damping circuit corresponding to each preset value.

[0070] Simultaneously, based on multiple vibration sensors, the target vibration intensity value is collected by each piezoelectric vibration damping circuit to reduce the vibration intensity at the ship's inlet; and by fusing the target vibration intensity values ​​corresponding to each piezoelectric vibration damping circuit collected by multiple vibration sensors, the overall vibration intensity value at the ship's inlet corresponding to each piezoelectric vibration damping circuit is obtained.

[0071] Here, the fusion method can be to add the target vibration intensity values ​​corresponding to each piezoelectric damping circuit collected by multiple vibration sensors to obtain the overall vibration intensity value; or it can be to average the target vibration intensity values ​​corresponding to each piezoelectric damping circuit collected by multiple vibration sensors to obtain the overall vibration intensity value.

[0072] In this embodiment, the overall vibration intensity value at the ship's inlet corresponding to each piezoelectric vibration damping circuit is determined by the fusion of multiple sensors, making the obtained overall vibration intensity value more accurate, so as to more accurately obtain the optimal piezoelectric vibration damping circuit corresponding to the current working condition and enhance the vibration damping effect.

[0073] In some embodiments, the step of acquiring the target vibration intensity value corresponding to each of the piezoelectric vibration damping circuits based on multiple vibration sensors includes:

[0074] Based on each of the vibration sensors, multiple original vibration intensity values ​​corresponding to each of the piezoelectric vibration damping circuits are collected at a preset sampling frequency within a preset time period; each of the original vibration intensity values ​​is formed by the piezoelectric vibration damping circuits reducing the vibration intensity at the ship's inlet at different sampling times within the preset time period; the duration of the preset time period is less than the target duration.

[0075] The average of the multiple original vibration intensity values ​​corresponding to each of the piezoelectric vibration damping circuits is calculated to obtain the target vibration intensity value corresponding to each of the piezoelectric vibration damping circuits collected by each of the vibration sensors.

[0076] The duration of the preset time period is less than the target duration, and the target duration is much less than the duration that the current working conditions can sustain.

[0077] Optionally, to ensure the accuracy of the vibration intensity data acquisition, multiple sensors can be used. For example, m high-precision vibration sensors can be installed at the end of the ship's inlet to monitor the vibration intensity at the inlet end in real time. The monitoring signals are then transmitted to the switch controller to display the target vibration intensity values ​​corresponding to each piezoelectric vibration damping circuit in real time. The specific calculation steps are as follows:

[0078] For each piezoelectric damping circuit, perform the following steps:

[0079] Based on multiple vibration sensors, within a preset time period [t] a , t b Within a preset sampling frequency, the piezoelectric vibration damping circuit collects multiple original vibration intensity values ​​at different sampling times within a preset time period to reduce the vibration intensity at the ship's inlet, denoted as T1(t), T2(t), ..., T... m (t), each vibration sensor can collect k raw vibration intensity values. For example, T1(t) includes raw vibration intensity values ​​T1(1), T1(2)...T1(k); T2(t) includes raw vibration intensity values ​​T2(1), T2(2)...T2(k); T m (t) includes the original vibration intensity values ​​T. m (1) T m (2)...T m (k).

[0080] Then, the calculation is performed for each sensor within the preset time period [t]. a , t b The data collected internally includes multiple original vibration intensity values ​​{T1(t), T2(t)...T} corresponding to the current piezoelectric vibration damping circuit. m The average value of (t)} is calculated to obtain the target vibration intensity value corresponding to the current piezoelectric damping circuit collected by each vibration sensor. The specific calculation formula is as follows:

[0081]

[0082]

[0083] …

[0084]

[0085] The preferred formula for calculating the overall vibration intensity value of the current piezoelectric vibration damping circuit is as follows:

[0086] S′(t)=S1(t)+S2(t)+…+S m (t);

[0087] Among them, S iS' represents the target vibration intensity value corresponding to the current piezoelectric vibration damping circuit collected by the i-th sensor; S' represents the overall vibration intensity value corresponding to the current piezoelectric vibration damping circuit.

[0088] This embodiment collects vibration intensity values ​​at multiple sampling times using multiple sensors, and then fuses these values ​​to determine the overall vibration intensity value at the ship's inlet corresponding to each piezoelectric vibration damping circuit. This makes the obtained overall vibration intensity value more accurate, allowing for a more precise identification of the optimal piezoelectric vibration damping circuit for the current operating condition and enhancing the vibration damping effect.

[0089] In some embodiments, step 102, which involves determining the optimal piezoelectric vibration damping circuit corresponding to the current operating condition among a plurality of piezoelectric vibration damping circuits based on the overall vibration intensity value, further includes:

[0090] Determine the minimum overall vibration intensity value among the overall vibration intensity values ​​at the ship's inlet corresponding to the multiple piezoelectric vibration damping circuits;

[0091] The piezoelectric vibration damping circuit corresponding to the minimum overall vibration intensity value among the multiple piezoelectric vibration damping circuits is taken as the optimal piezoelectric vibration damping circuit.

[0092] Optionally, after calculating and obtaining the overall vibration intensity values ​​S′1(t), S′2(t)...S′ corresponding to the n types of piezoelectric vibration damping circuits, n After (t), S′1(t), S′2(t)...S′ can be compared in the switch controller. n (t) is used to find the minimum overall vibration intensity value. The piezoelectric vibration damping circuit corresponding to the minimum value is the optimal piezoelectric vibration damping circuit for the current operating condition. This is the optimal adjustment method required by the switch controller for this operating condition, so as to adjust the number of energy consumption units connected to the piezoelectric element to the optimal value under the current operating condition, thereby adjusting the piezoelectric vibration damping effect of the piezoelectric element, so that the electrical energy converted by the piezoelectric element can be offset to the greatest extent, thereby ensuring that the vibration intensity at the ship's inlet reaches the minimum.

[0093] In some embodiments, the step 103 of reducing the vibration intensity at the ship's inlet based on the optimal piezoelectric vibration damping circuit includes:

[0094] Adjust the current piezoelectric vibration damping circuit under the current operating condition to the optimal piezoelectric vibration damping circuit;

[0095] According to the piezoelectric element in the adjusted current piezoelectric vibration damping circuit, the vibration energy at the ship's inlet is converted into electrical energy, and the electrical energy is transmitted to the energy-consuming unit in the adjusted current piezoelectric vibration damping circuit for the energy-consuming unit to consume the electrical energy.

[0096] Optionally, after determining the optimal piezoelectric vibration damping circuit, the current piezoelectric vibration damping circuit under the current operating condition can be adjusted by a switch controller to make it the optimal piezoelectric vibration damping circuit. Then, the piezoelectric element in the adjusted optimal piezoelectric vibration damping circuit converts the vibration energy at the ship's inlet into electrical energy and generates an alternating voltage. This electrical energy is then consumed by the energy-consuming unit in the adjusted optimal piezoelectric vibration damping circuit, thereby achieving the purpose of energy-consuming vibration damping. This ensures that the electrical energy converted by the piezoelectric element can be offset to the greatest extent, minimizing the vibration intensity at the ship's inlet and enhancing the vibration damping effect.

[0097] The vibration reduction system for ship inlets provided by the present invention will be described below. The vibration reduction system for ship inlets described below can be referred to in correspondence with the vibration reduction method for ship inlets described above.

[0098] like Figure 5 As shown, this embodiment provides a vibration reduction system for a ship's inlet, the system comprising:

[0099] The vibration acquisition module 501 is used to acquire the overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits under the current working condition; wherein, each of the piezoelectric vibration damping circuits is obtained by combining a piezoelectric sheet laid on the inner wall of the ship's inlet with a different number of energy dissipation units;

[0100] The control module 502 is used to determine the optimal piezoelectric vibration damping circuit corresponding to the current working condition among multiple piezoelectric vibration damping circuits based on the overall vibration intensity value.

[0101] The vibration reduction module 503 is used to reduce the vibration intensity at the ship's inlet based on the optimal piezoelectric vibration reduction circuit.

[0102] Optionally, under the current operating conditions, the switch controller in the control module 502 can control different numbers of energy consumption units and piezoelectric sheets to form different piezoelectric vibration damping circuits according to different preset quantities. When the piezoelectric sheets in the different piezoelectric vibration damping circuits vibrate on the inner wall of the ship's inlet, they can be subjected to stress, causing the piezoelectric material to undergo expansion and contraction deformation. Due to the positive piezoelectric effect, an alternating voltage will be generated in the polarization direction of the piezoelectric material, and then the electrical energy will be consumed through multiple energy consumption units in the shunt circuit connected thereto, thereby achieving the purpose of energy consumption and vibration damping of the ship's inlet.

[0103] After each piezoelectric vibration damping circuit completes one energy-consuming vibration damping cycle, the vibration intensity value at the ship's inlet can be collected at least once by the vibration acquisition module 501 to obtain the overall vibration intensity value at the ship's inlet corresponding to different piezoelectric vibration damping circuits, and the overall vibration intensity value at the ship's inlet corresponding to different piezoelectric vibration damping circuits is transmitted in real time to the switch controller in the control module 502.

[0104] After obtaining the overall vibration intensity values ​​at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits, the switch controller in control module 502 can compare the overall vibration intensity values ​​at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits to determine the optimal piezoelectric vibration damping circuit.

[0105] After determining the optimal piezoelectric vibration damping circuit, the vibration damping module 503 adjusts the number of energy-consuming units connected to the piezoelectric element to the optimal value through the optimal piezoelectric vibration damping circuit, thereby adjusting the piezoelectric vibration damping effect of the piezoelectric element, so that the electrical energy converted by the piezoelectric element can be offset to the greatest extent, so that the vibration intensity at the real-time monitored ship inlet is minimized, thereby effectively alleviating the fatigue problem of the ship inlet structure.

[0106] The vibration reduction system for ship inlets provided in this embodiment obtains the overall vibration intensity value at the ship inlet corresponding to different piezoelectric vibration reduction circuits obtained by combining piezoelectric elements with different numbers of energy-consuming units under different operating conditions. Based on the overall vibration intensity value, the optimal piezoelectric vibration reduction circuit suitable for different operating conditions is determined among multiple piezoelectric vibration reduction circuits. This enables the adaptive adjustment of the current piezoelectric vibration reduction circuit to the optimal piezoelectric vibration reduction circuit under different operating conditions, so that the vibration intensity at the ship inlet can be maintained at a low level under different operating conditions, effectively alleviating the structural fatigue problem of the inlet. It has strong applicability and excellent vibration reduction effect.

[0107] like Figure 3 As shown, the vibration acquisition module includes multiple vibration sensors, which are installed at the end of the ship's inlet to monitor the vibration intensity value at the ship's inlet in real time.

[0108] like Figure 2 As shown, the control module includes a switch controller, which is used to control the number of energy-consuming units connected to the piezoelectric element so that the piezoelectric vibration damping circuit under the current operating condition is the optimal piezoelectric vibration damping circuit, thereby minimizing the vibration intensity at the ship's inlet under the current operating condition.

[0109] like Figure 3 As shown, the switch controller and each of the energy-consuming units are located in the ship's power compartment.

[0110] like Figure 2As shown, each of the energy-consuming units is formed by two damping diodes with opposite wiring methods and identical structures connected in parallel, that is, the two damping diodes in each energy-consuming unit are in an anti-parallel structure.

[0111] In an anti-parallel configuration of damping diodes, the two diodes have opposite damping directions; one is connected to the positive terminal of the circuit, and the other to the negative terminal, thus achieving damping. When the electrical energy transmitted by the piezoelectric element needs to be consumed, both damping diodes will be in a conducting state, generating a large amount of heat to dissipate the energy.

[0112] The system provided by this invention is used to execute the above-described method embodiments. For specific processes and details, please refer to the above embodiments, which will not be repeated here.

[0113] Figure 6 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 6 As shown, the electronic device may include a processor 601, a communication interface 602, a memory 603, and a communication bus 604, wherein the processor 601, the communication interface 602, and the memory 603 communicate with each other via the communication bus 604. The processor 601 can call logical instructions in the memory 603 to execute a vibration reduction method for a ship's inlet. This method includes: obtaining the overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration reduction circuits under the current operating condition; wherein each piezoelectric vibration reduction circuit is obtained by combining piezoelectric sheets laid on the inner wall of the ship's inlet with a different number of energy-consuming units; determining the optimal piezoelectric vibration reduction circuit corresponding to the current operating condition among the multiple piezoelectric vibration reduction circuits based on the overall vibration intensity value; and reducing the vibration intensity at the ship's inlet based on the optimal piezoelectric vibration reduction circuit.

[0114] Furthermore, the logical instructions in the aforementioned memory 603 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0115] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the vibration reduction method for ship inlet provided by the above methods. The method includes: obtaining the overall vibration intensity value at the ship inlet corresponding to multiple piezoelectric vibration reduction circuits under the current operating condition; wherein each piezoelectric vibration reduction circuit is obtained by combining a piezoelectric sheet laid on the inner wall of the ship inlet and a different number of energy dissipation units; determining the optimal piezoelectric vibration reduction circuit corresponding to the current operating condition among the multiple piezoelectric vibration reduction circuits according to the overall vibration intensity value; and reducing the vibration intensity at the ship inlet based on the optimal piezoelectric vibration reduction circuit.

[0116] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a vibration reduction method for a ship's inlet provided by the methods described above. This method includes: obtaining the overall vibration intensity value at the ship's inlet corresponding to a plurality of piezoelectric vibration reduction circuits under the current operating condition; wherein each of the piezoelectric vibration reduction circuits is obtained by combining a piezoelectric sheet laid on the inner wall of the ship's inlet with a different number of energy-consuming units; determining the optimal piezoelectric vibration reduction circuit corresponding to the current operating condition among the plurality of piezoelectric vibration reduction circuits based on the overall vibration intensity value; and reducing the vibration intensity at the ship's inlet based on the optimal piezoelectric vibration reduction circuit.

[0117] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0118] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vibration reduction method for a ship's inlet, characterized in that, include: The overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits under the current operating conditions is obtained; wherein, each of the piezoelectric vibration damping circuits is obtained by combining a piezoelectric sheet laid on the inner wall of the ship's inlet with a different number of energy dissipation units; Based on the overall vibration intensity value, the optimal piezoelectric vibration damping circuit corresponding to the current operating condition is determined among the multiple piezoelectric vibration damping circuits. Based on the optimal piezoelectric vibration reduction circuit, the vibration intensity at the ship's inlet is reduced. The steps for obtaining the plurality of piezoelectric vibration damping circuits include: Based on each preset value, the number of energy-consuming units connected to the piezoelectric element is adjusted respectively; the number of energy-consuming units connected to the piezoelectric element is determined by adjusting the switching state of the connection switch of each energy-consuming unit to the piezoelectric vibration damping circuit. Based on the adjustment results, obtain the piezoelectric vibration damping circuits corresponding to each of the preset quantity values; The preset quantity values ​​are determined based on the maximum number of energy-consuming units that can be connected to the piezoelectric vibration damping circuit; the maximum number of energy-consuming units that can be connected is determined by combining the maximum vibration energy at the ship's inlet, the electrical energy that each energy-consuming unit can consume, and the safety margin.

2. The vibration reduction method for a ship's inlet according to claim 1, characterized in that, The process of obtaining the overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits under the current operating condition includes: Based on multiple vibration sensors, the target vibration intensity value corresponding to each piezoelectric vibration damping circuit is collected; the target vibration intensity value corresponding to each piezoelectric vibration damping circuit is formed by the vibration damping at the ship's inlet by each piezoelectric vibration damping circuit; the multiple vibration sensors are installed at the end of the ship's inlet; The target vibration intensity values ​​corresponding to each piezoelectric vibration damping circuit collected by multiple vibration sensors are fused to obtain the overall vibration intensity value at the ship's inlet corresponding to each piezoelectric vibration damping circuit.

3. The vibration reduction method for a ship's inlet according to claim 2, characterized in that, The process of acquiring target vibration intensity values ​​corresponding to each piezoelectric vibration damping circuit based on multiple vibration sensors includes: Based on each of the vibration sensors, multiple original vibration intensity values ​​corresponding to each of the piezoelectric vibration damping circuits are collected at a preset sampling frequency within a preset time period; each of the original vibration intensity values ​​is formed by the piezoelectric vibration damping circuits reducing the vibration intensity at the ship's inlet at different sampling times within the preset time period; the duration of the preset time period is less than the target duration. The average of the multiple original vibration intensity values ​​corresponding to each of the piezoelectric vibration damping circuits is calculated to obtain the target vibration intensity value corresponding to each of the piezoelectric vibration damping circuits collected by each of the vibration sensors.

4. The vibration reduction method for a ship's inlet according to any one of claims 1-3, characterized in that, The step of determining the optimal piezoelectric vibration damping circuit corresponding to the current operating condition among multiple piezoelectric vibration damping circuits based on the overall vibration intensity value includes: Determine the minimum overall vibration intensity value among the overall vibration intensity values ​​at the ship's inlet corresponding to the multiple piezoelectric vibration damping circuits; The piezoelectric vibration damping circuit corresponding to the minimum overall vibration intensity value among the multiple piezoelectric vibration damping circuits is taken as the optimal piezoelectric vibration damping circuit.

5. The vibration reduction method for a ship's inlet according to any one of claims 1-3, characterized in that, The method of reducing vibration intensity at the ship's inlet based on the optimal piezoelectric vibration reduction circuit includes: Adjust the current piezoelectric vibration damping circuit under the current operating condition to the optimal piezoelectric vibration damping circuit; According to the piezoelectric element in the adjusted current piezoelectric vibration damping circuit, the vibration energy at the ship's inlet is converted into electrical energy, and the electrical energy is transmitted to the energy-consuming unit in the adjusted current piezoelectric vibration damping circuit for the energy-consuming unit to consume the electrical energy.

6. A vibration reduction system for a ship's inlet, characterized in that, include: The vibration acquisition module is used to acquire the overall vibration intensity value at the ship's inlet corresponding to multiple piezoelectric vibration damping circuits under the current operating conditions; wherein, each of the piezoelectric vibration damping circuits is obtained by combining a piezoelectric sheet laid on the inner wall of the ship's inlet with a different number of energy dissipation units; The control module is used to determine the optimal piezoelectric vibration damping circuit corresponding to the current working condition among multiple piezoelectric vibration damping circuits based on the overall vibration intensity value. The vibration reduction module is used to reduce the vibration intensity at the ship's inlet based on the optimal piezoelectric vibration reduction circuit. The steps for obtaining the plurality of piezoelectric vibration damping circuits include: Based on each preset value, the number of energy-consuming units connected to the piezoelectric element is adjusted respectively; the number of energy-consuming units connected to the piezoelectric element is determined by adjusting the switching state of the connection switch of each energy-consuming unit to the piezoelectric vibration damping circuit. Based on the adjustment results, obtain the piezoelectric vibration damping circuits corresponding to each of the preset quantity values; The preset quantity values ​​are determined based on the maximum number of energy-consuming units that can be connected to the piezoelectric vibration damping circuit; the maximum number of energy-consuming units that can be connected is determined by combining the maximum vibration energy at the ship's inlet, the electrical energy that each energy-consuming unit can consume, and the safety margin.

7. The vibration reduction system for a ship's inlet according to claim 6, characterized in that, The vibration acquisition module includes multiple vibration sensors, which are installed at the end of the ship's inlet. The control module includes a switch controller, which is used to control the number of energy-consuming units connected to the piezoelectric element; The switch controller and each of the energy-consuming units are located in the ship's power compartment.

8. The vibration reduction system for a ship's inlet according to claim 6, characterized in that, Each of the aforementioned energy-consuming units is formed by two damping diodes connected in parallel with opposite wiring methods and identical structures.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the vibration reduction method for ship inlet as described in any one of claims 1 to 5.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the vibration reduction method for ship inlet as described in any one of claims 1 to 5.

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