Electric drive integrated NVH simulation modeling method

A simulation modeling, electric drive technology, applied in design optimization/simulation, 3D modeling, multi-objective optimization, etc., can solve problems such as inaccurate results, low simulation efficiency, and inability to consider the coupling effect of the motor and the reducer. The effect of reducing the amount of calculation, ensuring accuracy, and saving manual setup and analysis time

Pending Publication Date: 2022-05-24
CHINA FIRST AUTOMOBILE
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problem that the simulation method of the prior art cannot consider the coupling influence of the motor and the reducer, the simulation efficiency is low, and the results are not accurate enough, the present invention proposes an electric drive integrated NVH simulation modeling method

Method used

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  • Electric drive integrated NVH simulation modeling method
  • Electric drive integrated NVH simulation modeling method
  • Electric drive integrated NVH simulation modeling method

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Embodiment 1

[0045] This embodiment provides an electric drive integrated NVH simulation modeling method, refer to the process figure 1 This embodiment can be better understood, and the specific method includes the following steps:

[0046] Step 1. Carry out detailed finite element modeling of the components of the electric drive system;

[0047] Step 2. Use the elastic element to constrain the suspension bracket, set the elastic modulus of the elastic element in the three directions of X-axis, Y-axis and Z-axis according to the actual suspension stiffness parameters, assemble the established finite element model, and establish the electric drive Assembly structure finite element model;

[0048] Step 3. Simplify the finite element model of the electric drive assembly structure and coarsen the mesh size of the model;

[0049] Step 4. Correct the size of the coarsened grid to obtain a coarsened grid with suitable precision;

[0050] Step 5. Envelope the electric drive model with a coarse me...

Embodiment 2

[0055] This embodiment is a further limitation of Embodiment 1. The components of the electric drive system described in step 1 include a motor, a reducer, an inverter, and a suspension bracket.

Embodiment 3

[0057] This embodiment is a further limitation of Embodiment 2. The motor includes a stator, a rotor and a casing of the motor, the reducer includes a reducer casing and a gear reducer shaft tooth structure, and the inverter includes an inverter shell and its internal structure.

[0058] In this embodiment, finite element models are established for each component of the electric drive system, including all shells and internal structures of all electric drive systems, so as to ensure high accuracy of subsequent simulation calculation results.

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Abstract

The invention relates to the technical field of electric drive system simulation, in particular to an electric drive integrated NVH simulation modeling method. The method comprises the following steps: firstly, respectively carrying out detailed finite element modeling on parts of an electric drive system, then assembling the established finite element models, establishing an electric drive assembly structure finite element model, carrying out mesh coarsening and correction on the electric drive assembly structure finite element model, then enveloping an electric drive model, further establishing an acoustic finite element model, and finally establishing an acoustic finite element model. Meanwhile, motor and speed reducer excitation is obtained, the excitation is loaded to a corresponding electric drive finite element model, an acoustic field point is set in the model, and finally the electric drive integrated NVH simulation model is established. The model obtained by applying the modeling method is high in simulation precision and high in efficiency, and can meet project development requirements.

Description

technical field [0001] The invention relates to the technical field of electric drive system simulation, in particular to an electric drive integrated NVH simulation modeling method. Background technique [0002] Compared with the traditional drive mode, the electric drive system consumes electric energy to achieve the purpose of driving the system to move or work. At present, this type of drive mode has been widely used in industrial fields, such as electric compressors of household air-conditioning systems, electric vehicles, small Drones etc. Of course, in some heavy industries, electric drive also exists, such as electric locomotives, wind power, submarine propulsion systems and other fields. It can be seen that the application fields of electric drives are getting wider and wider, and the products used are also getting larger and larger. It can be foreseen that in the near future, the driving methods we see every day will be mainly electric drives. [0003] NVH (Noise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06T17/20G06F119/10G06F111/04G06F111/06
CPCG06F30/23G06T17/20G06F2119/10G06F2111/04G06F2111/06Y02T90/00
Inventor 史同杰牛文博刘英杰何洪源蔡辉王刚袁帅
Owner CHINA FIRST AUTOMOBILE
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