Vibration Simulation Method and Device for Wind Turbine Generator Set

Abstract

The present application provides a vibration simulation method and device for a wind turbine generator set. The method includes: constructing a finite element model of the frame, where the finite element model includes a three-dimensional model of the frame and load mass points; determining the main nodes among the load mass points; according to the main nodes, condensing the finite element model into a super-element model; respectively performing modal analysis on the finite element model and the super-element model to obtain the natural frequencies of the finite element model and the super-element model and / or the vibration modes of the finite element model and the super-element model; when the ratio of the difference between the natural frequency of the super-element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within a preset ratio range, and / or the vibration modes of the finite element model and the super-element model are basically the same, applying constraint and load boundary conditions on the super-element model; performing transient dynamics analysis on the super-element after applying the constraint and load boundary conditions to obtain the vibration information of the converter and / or the transformer.

Description

Technical Field

[0001] This application relates to the field of wind turbines, and particularly to a vibration simulation method and device for a wind turbine. Background Art

[0002] The wind power industry has entered the era of parity, and placing large components (including converters, transformers, etc.) inside the nacelle has become a future technological trend. Placing large components on top can reduce the number of cables and line losses. However, when large components are placed on the rack inside the nacelle, the vibration of the nacelle will be transmitted to the large components. To ensure the normal operation of the wind turbine, it is necessary to consider the impact of rack vibration on large components.

[0003] To evaluate the vibration of large components above the rack, the finite element method is usually used to establish a solid element or shell element model of the rack, and the large components are simplified as mass points. Although the structure of the rack is relatively simple, its overall size is large and the number of elements is huge, resulting in low computational efficiency when performing transient dynamics analysis. Summary of the Invention

[0004] This application provides a vibration simulation method and device for a wind turbine to solve the problem of high computational time cost caused by the large number of nodes and elements in the current finite element model.

[0005] Specifically, this application is implemented through the following technical solutions:

[0006] In the first aspect of the embodiments of this application, a vibration simulation method for a wind turbine is provided. The wind turbine includes a nacelle, a rack disposed inside the nacelle, and a converter and / or a transformer disposed on the rack. The method includes:

[0007] Construct a finite element model of the rack. The finite element model includes a three-dimensional model of the rack and load mass points, and the load mass points at least include the mass points corresponding to the converter and / or the transformer respectively;

[0008] Determine the main nodes in the load mass points. The main nodes include the mass points corresponding to the converter and / or the transformer respectively;

[0009] According to the main nodes, condense the finite element model into a super element model;

[0010] Perform modal analysis on the finite element model and the super element model respectively to obtain the natural frequencies of the finite element model and the super element model, and / or the vibration modes of the finite element model and the super element model;

[0011] When the ratio of the difference between the natural frequency of the super-element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within a preset ratio range, and / or the vibration mode of the finite element model is basically the same as that of the super-element model, constraints and load boundary conditions are applied to the super-element model;

[0012] Perform transient dynamics analysis on the super-element after applying constraints and load boundary conditions to obtain the vibration information of the converter and / or the transformer.

[0013] Optionally, the frame is a rear frame, and the wind turbine generator further includes a front frame disposed inside the nacelle;

[0014] Applying constraints and load boundary conditions to the super-element model includes:

[0015] On the super-element model, set full constraints at the position where the rear frame is connected to the front frame; and

[0016] Obtain the acceleration load and angular acceleration load of the rear frame, and apply the acceleration load and the angular acceleration load to the super-element model simultaneously.

[0017] Optionally, the acceleration load and angular acceleration load of the rear frame are obtained by simulating with Bladed software according to preset wind load information.

[0018] Optionally, the vibration information includes vibration acceleration.

[0019] Optionally, the method further includes:

[0020] When the ratio of the difference between the natural frequency of the super-element model and the natural frequency of the finite element model to the natural frequency of the finite element model is outside the preset ratio range, and / or the vibration mode of the finite element model is inconsistent with that of the super-element model, add the master nodes in the load mass points, and after adding the master nodes, re-condense the finite element model into a super-element model until the ratio of the difference between the natural frequency of the super-element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within the preset ratio range, and / or the vibration mode of the finite element model is basically the same as that of the super-element model.

[0021] Optionally, condensing the finite element model into a super-element model according to the master nodes includes:

[0022] Solve the finite element model according to the master nodes and the modal synthesis method to obtain the super-element model;

[0023] Among them, the truncated modal order of the modal synthesis method is determined according to the resonance frequency of the frame.

[0024] Optionally, the number of the main nodes is greater than or equal to a preset multiple of the modal order, and the preset multiple is greater than or equal to 2.

[0025] Optionally, the main nodes include the load mass points among the load mass points whose degrees of freedom are the same as the vibration direction of the frame.

[0026] Optionally, constructing the finite element model of the frame includes:

[0027] Performing geometric cleaning on the three-dimensional model of the frame to remove the holes in the three-dimensional model and the structural members whose influence degree on the stiffness of the frame is less than or equal to a preset degree threshold;

[0028] Performing mesh division on the three-dimensional model after geometric cleaning and adding the load mass points;

[0029] Among them, the load mass points further include the mass points corresponding to the generator, the water pump, and the radiator respectively.

[0030] In a second aspect of the embodiments of the present application, there is provided a vibration simulation device for a wind turbine generator set. The wind turbine generator set includes a nacelle, a frame disposed inside the nacelle, and an inverter and / or a transformer disposed on the frame. The vibration simulation device includes one or more processors for implementing the vibration simulation method according to any one of the first aspect.

[0031] In a third aspect of the embodiments of the present application, there is provided a computer-readable storage medium, on which a program is stored. When the program is executed by a processor, the vibration simulation method according to any one of the first aspect is implemented.

[0032] According to the technical solution provided by the embodiments of the present application, the finite element model of the frame is converted into a super element model. The matrix order of the super element model of the frame is much smaller than the matrix order of the finite element model of the frame, which improves the calculation efficiency when performing transient dynamics analysis on the frame. Especially when multiple iterative optimizations are required in the design stage of the wind turbine generator set, except for occupying a certain amount of time during the process of condensing the finite element model into a super element model, the condensed super element model can significantly shorten the time for transient dynamics analysis.

[0033] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Description of the Drawings

[0034] The accompanying drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with the present application, and are used together with the description to explain the principles of the present application.

[0035] Figure 1 It is a schematic flowchart of a vibration simulation method for a wind turbine shown in an exemplary embodiment of the present application;

[0036] Figure 2 It is a schematic diagram of the implementation process of applying constraint and load boundary conditions on a super element model shown in an exemplary embodiment of the present application;

[0037] Figure 3 It is a schematic structural diagram of a rear frame of a wind turbine shown in an exemplary embodiment of the present application;

[0038] Figure 4 It is a schematic structural diagram of a vibration simulation device for a wind turbine shown in an exemplary embodiment of the present application. Detailed implementation manners

[0039] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0040] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "the", and "said" used in the present application 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" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0041] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0042] It should be noted that, without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0043] The wind turbine generator set in the embodiment of the present application may include a nacelle and a frame, wherein the frame is arranged inside the nacelle. The wind turbine generator set may further include a converter and / or a transformer arranged on the frame.

[0044] It should be noted that in the embodiment of the present application, the wind turbine generator set includes a converter and a transformer. Among them, in some embodiments, one of the converter and the transformer is arranged on the frame, and the other is arranged outside the nacelle. In this embodiment, vibration analysis needs to be performed on the converter or the transformer arranged on the frame; while in other embodiments, both the converter and the transformer are arranged on the frame. In this embodiment, vibration analysis needs to be performed on both the converter and the transformer.

[0045] The frame can be a rear frame, and the rear frame is arranged at the rear end inside the nacelle (the end far from the impeller inside the nacelle); while in other embodiments, the frame can also be arranged at other positions inside the nacelle.

[0046] In the following embodiments, the rear frame is taken as an example for description.

[0047] Figure 1 It is a schematic flowchart of a vibration simulation method for a wind turbine generator set shown in an exemplary embodiment of the present application; as Figure 1 shown, the vibration simulation method for a wind turbine generator set provided by the embodiment of the present application may include steps S11 to S16.

[0048] Among them, in S11, a finite element model of the rear frame is constructed. The finite element model includes a three-dimensional model of the rear frame and load mass points, and the load mass points at least include the mass points corresponding to the converter and / or the transformer respectively.

[0049] It should be understood that when one of the converter and the transformer is arranged on the frame, the load mass points in step S11 include the converter arranged on the frame or the transformer arranged on the frame; when both the converter and the transformer are arranged on the frame, the load mass points in step S11 include the converter and the transformer.

[0050] Among them, the process of constructing the finite element model of the rear frame may include but is not limited to the following steps:

[0051] (1). Geometric cleaning is performed on the three-dimensional model of the rear frame to remove the holes in the three-dimensional model and the structural members whose influence degree on the stiffness of the rear frame is less than or equal to a preset degree threshold;

[0052] The purpose of step (1) is to remove the structures arranged on the rear frame but with little influence on the stiffness of the rear frame.

[0053] In this step, the holes may include bolt holes and / or installation process holes, or other holes; the structural members may include brackets or other structural members.

[0054] The size of the preset degree threshold can be set as needed.

[0055] (2) Perform mesh division on the three-dimensional model after geometric cleaning, and add load mass points. Among them, the load mass points may also include the mass points corresponding to the generator, water pump, and radiator respectively.

[0056] This application does not specifically limit the method of mesh division, and the existing mesh division methods for three-dimensional models can be used.

[0057] Moreover, after mesh division, operations such as material assignment need to be performed to initially establish the finite element model of the rear frame.

[0058] Adding load mass points is performed after mesh division of the three-dimensional model after geometric cleaning.

[0059] In the embodiments of this application, the MASS21 element can be used to simulate the mass of the generator, water pump, radiator, transformer, and converter, etc., and the installation positions on the rear frame corresponding to the generator, water pump, radiator, transformer, and converter, etc. are connected by point-surface contact.

[0060] In S12, determine the main nodes in the load mass points. The main nodes include the mass points corresponding to the converter and / or transformer respectively.

[0061] It should be understood that when one of the converter and the transformer is installed on the frame, the main nodes in step S12 include the converter installed on the frame or the transformer installed on the frame; when both the converter and the transformer are installed on the frame, the main nodes in step S12 include the converter and the transformer.

[0062] In some embodiments, the main nodes may also include the load mass points in the load mass points whose degrees of freedom are the same as the vibration direction of the rear frame.

[0063] In S13, according to the main nodes, condense the finite element model into a super element model.

[0064] A super element is equivalent to constructing a special element to represent a group of elements. It condenses the stiffness and mass matrices of most nodes on the finite element model to the stiffness and mass matrices of a small number of main nodes through some transformations, thereby reducing the matrix order and improving the calculation efficiency. It is applicable to structures with relatively simple structural forms and composed of simple geometric shapes.

[0065] Optionally, step S13 is to solve the finite element model according to the main nodes and the modal synthesis method to obtain the super element model. Among them, the truncated modal order of the modal synthesis method is determined according to the resonance frequency of the rear frame.

[0066] In some embodiments, to improve the accuracy of the super-element model, the number of master nodes is greater than or equal to a preset multiple of the modal order. Among them, the preset multiple can be greater than or equal to 2.

[0067] The master nodes can be determined according to the following master node determination principles:

[0068] 1) The number of master nodes is twice or more than twice the required modal order;

[0069] 2) The master nodes include the load mass points among the load mass points whose degrees of freedom are in the same direction as the vibration of the rear frame;

[0070] 3) The structures to be subjected to vibration analysis, i.e., the converters and / or transformers provided on the rear frame;

[0071] 4) The positions and / or structural members with relatively large mass and relatively small stiffness. Specifically, the positions and / or structural members with relatively large mass and relatively small stiffness can be defined according to requirements.

[0072] In S14, modal analysis is performed on the finite element model and the super-element model respectively to obtain the natural frequencies of the finite element model and the super-element model, and / or the vibration modes of the finite element model and the super-element model.

[0073] Step S14 is to verify the accuracy of the super-element model and prevent the vibration analysis accuracy from being low due to large super-element errors. In some embodiments, modal analysis is performed on the finite element model and the super-element model respectively to obtain the natural frequencies of the finite element model and the super-element model, and then the accuracy of the super-element model is verified according to the natural frequencies of the finite element model and the super-element model; in some other embodiments, modal analysis is performed on the finite element model and the super-element model respectively to obtain the vibration modes of the finite element model and the super-element model, and then the accuracy of the super-element model is verified according to the vibration modes of the finite element model and the super-element model; in some other embodiments, modal analysis is performed on the finite element model and the super-element model respectively to obtain the natural frequencies of the finite element model and the super-element model, and the vibration modes of the finite element model and the super-element model, and then the accuracy of the super-element model is verified according to the natural frequencies of the finite element model and the super-element model, and the vibration modes of the finite element model and the super-element model.

[0074] In S15, when the ratio of the difference between the natural frequency of the super-element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within a preset ratio range, and / or the vibration mode of the finite element model is basically the same as the vibration mode of the super-element model, constraint and load boundary conditions are applied to the super-element model.

[0075] Suppose the natural frequency of the finite element model obtained in S14 is f1, and the natural frequency of the super element model is f2. Then, the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is: |f1 - f2| / f1.

[0076] The preset ratio range can be set according to requirements. For example, when the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is less than or equal to 10%, constraint and load boundary conditions are applied to the super element model.

[0077] In the embodiment of the present application, the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within the preset ratio range, and / or the vibration modes of the super element model of the rear frame and the finite element model of the rear frame are basically the same, indicating that the error of the super element model of the rear frame is small and is suitable for subsequent analysis of the vibration of the converter and / or transformer provided on the rear frame based on the super element model of the rear frame.

[0078] In some embodiments, when the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within the preset ratio range, constraint and load boundary conditions are applied to the super element model. In this embodiment, the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within the preset ratio range, indicating that the error of the super element model of the rear frame is small.

[0079] In some other embodiments, when the vibration modes of the super element model of the rear frame and the finite element model of the rear frame are basically the same, constraint and load boundary conditions are applied to the super element model. In this embodiment, the vibration modes of the super element model of the rear frame and the finite element model of the rear frame are basically the same, indicating that the error of the super element model of the rear frame is small.

[0080] In some other embodiments, when the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within the preset ratio range, and the vibration modes of the super element model of the rear frame and the finite element model of the rear frame are basically the same, constraint and load boundary conditions are applied to the super element model. In this embodiment, the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within the preset ratio range, and the vibration modes of the super element model of the rear frame and the finite element model of the rear frame are basically the same, indicating that the error of the super element model of the rear frame is small.

[0081] It should be noted that in the embodiments of the present application, the vibration modes of the super element model of the rear frame and the finite element model of the rear frame being substantially the same may include the vibration modes of the super element model of the rear frame and the finite element model of the rear frame being the same or approximately the same.

[0082] The wind turbine may further include a front frame disposed inside the nacelle, and the front frame is connected to the rear frame.

[0083] See Figure 2 , the implementation process of applying constraints and load boundary conditions on the super element model may include steps S151 to S152.

[0084] Among them, in S151, on the super element model, full constraints are set at the positions of the rear frame for connecting to the front frame.

[0085] Full constraints are equivalent to simulating the connection between the rear frame and the front frame.

[0086] In S152, the acceleration load and angular acceleration load of the rear frame are obtained, and the acceleration load and angular acceleration load are simultaneously applied to the super element model.

[0087] The acceleration load and angular acceleration load of the rear frame can be obtained by simulating with Bladed software according to the preset wind load information, or can also be obtained by simulating with other software according to the preset wind load information. Among them, the preset wind load information may include parameters such as wind speed and wind direction.

[0088] In step S152, the acceleration load and angular acceleration load are applied to the super element model in the form of overall acceleration.

[0089] In addition, when the difference between the natural frequency of the super element model and the natural frequency of the finite element model and the ratio of the difference to the natural frequency of the finite element model are outside the preset ratio range, and / or the vibration mode of the finite element model is inconsistent with the vibration mode of the super element model, the main nodes in the load mass points are increased, and after increasing the main nodes, the finite element model is re-condensed into a super element model until the difference between the natural frequency of the super element model and the natural frequency of the finite element model and the ratio of the difference to the natural frequency of the finite element model are within the preset ratio range, and / or the vibration mode of the finite element model is substantially the same as the vibration mode of the super element model. Among them, the difference between the natural frequency of the super element model and the natural frequency of the finite element model and the ratio of the difference to the natural frequency of the finite element model not being within the preset ratio range, and / or the vibration mode of the super element model of the rear frame being inconsistent with the vibration mode of the finite element model of the rear frame indicates that the error of the super element model of the rear frame is relatively large, and the super element model of the rear frame needs to be re-determined.

[0090] In S16, transient dynamic analysis is performed on the super element after applying constraints and load boundary conditions to obtain the vibration information of the converter and / or transformer.

[0091] It should be understood that when one of the converter and the transformer is installed on the frame, the vibration information of the converter or the transformer installed on the frame needs to be obtained in step S16; when both the converter and the transformer are installed on the frame, the vibration information of the converter and the transformer needs to be obtained in step S16.

[0092] In the embodiments of the present application, the vibration information may include vibration acceleration, and may also include other vibration information.

[0093] Please refer to Figure 3 , the wind turbine generator set includes a rear frame 1, a converter 2 and a transformer 3, and the vibration simulation method of the wind turbine generator set may include the following steps:

[0094] (1). Construct a finite element model of the rear frame 1 of the wind turbine generator set;

[0095] Specifically, geometric cleaning is performed on the original three-dimensional model of the rear frame 1 to remove bolt holes and installation process holes, as well as small components such as brackets that have little influence on the stiffness of the rear frame 1; then, the three-dimensional model of the rear frame 1 is meshed and material is assigned through finite element software to establish its finite element model; then, the MASS21 element is used to simulate the mass of the converter 2 and the transformer 3, and the installation positions on the rear frame 1 corresponding to the converter 2 and the transformer 3 are connected by point-surface contact.

[0096] (2). On the finite element model obtained in step (1), a total of 43 main nodes are determined according to the main node determination principle in the above embodiments; then, the solution in the finite element software is entered, the solution method is selected as the modal synthesis method, the truncated modal order is 20 orders, and the super element model of the rear frame 1 is obtained after the solution.

[0097] (3). Modal analysis is performed on the super element model and the finite element model of the rear frame 1 respectively, and the natural frequencies and vibration modes of the two models are compared. After comparison, it is found that the error of the natural frequencies is within 5%, and the vibration modes are basically the same, indicating that the positions and quantities of the main nodes are appropriate, and the super element model of the rear frame 1 meets the requirements.

[0098] (4). In the finite element software, the position where the rear frame 1 is connected to the front frame is set to full constraint, and then the acceleration load and angular acceleration load of the rear frame 1 of the wind turbine generator set obtained by the Bladed software in the tower top coordinate system are applied to the super element model in the form of overall acceleration for transient dynamics calculation, and the vibration acceleration of the converter 2 and the transformer 3 is obtained in a short time, saving a large amount of computational time cost compared with performing transient dynamics analysis on the finite element model.

[0099] The vibration simulation method of the wind turbine in the embodiment of the present application converts the finite element model of the rear frame into a super element model. The matrix order of the super element model of the rear frame is much smaller than that of the finite element model of the rear frame, improving the calculation efficiency when performing transient dynamics analysis on the rear frame. Especially when multiple iterative optimizations are required during the design stage of the wind turbine, except for the time occupied during the process of condensing the finite element model into a super element model, the condensed super element model can significantly shorten the time for transient dynamics analysis.

[0100] Corresponding to the embodiment of the vibration simulation method of the wind turbine described above, the present application also provides an embodiment of a vibration simulation device for a wind turbine.

[0101] See Figure 4 , the embodiment of the present application also provides a vibration simulation device for a wind turbine. The wind turbine includes a nacelle, a rear frame disposed inside the nacelle, and an inverter and / or a transformer disposed on the rear frame. The vibration simulation device in the embodiment of the present application may include one or more processors for implementing the vibration simulation method in the above embodiment.

[0102] The embodiment of the vibration simulation device of the wind turbine in the present application can be applied to any device with data processing capabilities, such as a computer. Taking a computer as an example, the device embodiment can be implemented through software, or through hardware or a combination of software and hardware. Taking the software implementation as an example, as a logically meaningful device, it is formed by the processor of the computer where it is located reading the corresponding computer program instructions in the non-volatile memory into the memory for operation. From the hardware level, as Figure 4 shown, it is a hardware structure diagram of the computer where the vibration simulation device of the wind turbine in the present application is located. Except for Figure 4 the processor, memory, network interface, and non-volatile memory shown, the computer where the device is located in the embodiment usually includes other hardware according to the actual functions of the computer, which will not be elaborated here.

[0103] The implementation processes of the functions and roles of each unit in the above device are specifically described in detail in the implementation processes of the corresponding steps in the above method, and will not be elaborated here.

[0104] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to the descriptions of the method embodiments. The device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this application. A person of ordinary skill in the art can understand and implement it without creative work.

[0105] The embodiments of the present application also provide a computer-readable storage medium, on which a program is stored. When the program is executed by a processor, the vibration simulation method of the wind turbine in the above embodiments is implemented.

[0106] The computer-readable storage medium may be an internal storage unit of any device with data processing capabilities described in any of the foregoing embodiments, such as a hard disk or memory. The computer-readable storage medium may also be an external storage device of the wind turbine, such as a plug-in hard disk, a Smart Media Card (SMC), an SD card, a Flash Card, etc. equipped on the device. Further, the computer-readable storage medium may also include both an internal storage unit of any device with data processing capabilities and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by any device with data processing capabilities, and can also be used to temporarily store the data that has been output or will be output.

[0107] The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A vibration simulation method for a wind turbine generator set, the wind turbine generator set including a nacelle, a frame disposed inside the nacelle, and an inverter and / or a transformer disposed on the frame, characterized in that, The method includes: Constructing a finite element model of the frame, where the finite element model includes a three-dimensional model of the frame and load mass points, and the load mass points at least include the mass points corresponding to the converter and / or the transformer respectively; Determining the main nodes in the load mass points, where the main nodes include the mass points corresponding to the converter and / or the transformer respectively; Solving the finite element model according to the main nodes and the modal synthesis method to obtain a super element model; Performing modal analysis on the finite element model and the super element model respectively to obtain the natural frequencies of the finite element model and the super element model, and / or the vibration modes of the finite element model and the super element model; When the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within a preset ratio range, and / or the vibration mode of the finite element model is basically the same as that of the super element model, applying constraint and load boundary conditions to the super element model; Performing transient dynamic analysis on the super element after applying the constraint and load boundary conditions to obtain the vibration information of the converter and / or the transformer.

2. The vibration simulation method of the wind turbine according to claim 1, characterized in that, The frame is a rear frame, and the wind turbine generator set further includes a front frame disposed inside the nacelle; The applying the constraint and load boundary conditions to the super element model includes: On the super element model, setting full constraints at the positions where the rear frame is connected to the front frame; And Obtaining the acceleration load and angular acceleration load of the rear frame, and applying the acceleration load and the angular acceleration load to the super element model simultaneously.

3. The vibration simulation method of a wind turbine according to claim 2, characterized in that, The acceleration load and angular acceleration load of the rear frame are obtained by simulating with Bladed software according to preset wind load information.

4. The vibration simulation method of a wind turbine according to any one of claims 1 to 3, characterized in that, The vibration information includes vibration acceleration.

5. The vibration simulation method of the wind turbine according to claim 1, characterized in that, The method further includes: When the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is outside the preset ratio range, and / or the vibration mode of the finite element model is inconsistent with that of the super element model, increasing the main nodes in the load mass points, and after increasing the main nodes, re-condensing the finite element model into a super element model until the ratio of the difference between the natural frequency of the super element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within the preset ratio range, and / or the vibration mode of the finite element model is basically the same as that of the super element model.

6. The vibration simulation method of the wind turbine according to claim 1, wherein The truncated modal order of the modal synthesis method is determined according to the resonance frequency of the frame.

7. The vibration simulation method of the wind turbine according to claim 6, characterized in that, The number of the main nodes is greater than or equal to a preset multiple of the modal order, and the preset multiple is greater than or equal to 2.

8. The vibration simulation method of a wind turbine according to claim 1 or 7, characterized in that The main nodes include the load mass points in the load mass points whose degrees of freedom are the same as the vibration direction of the frame.

9. The vibration simulation method of a wind turbine according to claim 1, characterized in that The constructing the finite element model of the frame includes: Performing geometric cleaning on the three-dimensional model of the frame to remove the holes in the three-dimensional model and the structural members whose influence degree on the stiffness of the frame is less than or equal to a preset degree threshold; Mesh the 3D model after geometric cleaning and add the load mass points; Among them, the load mass points also include the mass points corresponding to the generator, water pump, and radiator respectively.

10. A vibration simulation device for a wind turbine generator set, the wind turbine generator set including a nacelle, a frame disposed inside the nacelle, and a converter and / or a transformer disposed on the frame, characterized in that, The vibration simulation device includes one or more processors for implementing the vibration simulation method according to any one of claims 1-9.

11. A computer-readable storage medium, characterized in that, A program is stored thereon, and when the program is executed by the processor, the vibration simulation method according to any one of claims 1-9 is implemented.

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