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Engine cover dynamic fatigue analysis method

An engine cover and analysis method technology, which is applied in computer-aided design, geometric CAD, design optimization/simulation, etc., can solve the problems of prolonging the engine cover optimization design cycle, heavy workload, and long time consumption, so as to shorten the development and design time. Effect

Active Publication Date: 2022-07-08
CHONGQING CHANGAN AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

However, this method has at least the following defects: Compared with the engine cover system, the calculation of the whole vehicle model is large and time-consuming, and the workload unrelated to the calculation of the engine cover is large, which prolongs the optimal design cycle of the engine cover.

Method used

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  • Engine cover dynamic fatigue analysis method
  • Engine cover dynamic fatigue analysis method
  • Engine cover dynamic fatigue analysis method

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Experimental program
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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] like figure 1 As shown, a dynamic fatigue analysis method of engine cover includes the following steps:

[0025] Step A. Load decomposition:

[0026] In order to verify the durability and reliability of the whole vehicle, it is necessary to carry out different road tests according to different models. In order to speed up the load extraction, the virtual test field simulation analysis can be carried out for these working conditions, and the loads of the corresponding road body and chassis attachment points can be obtained respectively.

[0027] Step B. Finite element transient frequency response analysis of interior body model:

[0028] Prepare the interior body finite element mesh model, such as figure 2 According to the load of the attachment point between the body and the chassis obtained in step A, the transient frequency response analysis of the interi...

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Abstract

The invention discloses a dynamic fatigue analysis method for an engine cover, comprising the following steps: A. According to the reliability road test conditions, carry out a virtual test field simulation analysis to obtain the load of the attachment point between the body and the chassis; B. Obtain according to step A. Carry out transient frequency response analysis based on the CAE method, and extract the force and moment of the connection point between the engine cover and the body; C. According to the force and moment of the connection point between the engine cover and the body obtained in step B, carry out the engine cover system based on the CAE method Dynamic fatigue analysis to obtain its fatigue performance; D. Judging whether the fatigue performance of the engine cover is qualified based on the design requirements; if qualified, go to step F; otherwise, go to step E; E. Optimize the structural design of the engine cover and the arrangement of the buffer blocks , and enter step C; F, adopt the engine cover structure. The invention provides an efficient engine cover dynamic fatigue analysis method.

Description

technical field [0001] The invention belongs to the technical field of automobile computer-aided design, and particularly relates to a dynamic fatigue analysis method of an engine cover. Background technique [0002] During the driving process of the car, under the dual excitation of the engine and the road, the engine cover is always in a relatively complex vibration environment. If the design of the engine cover can not meet the requirements of dynamic fatigue performance, it will have a great impact on the safety and harshness of the car (ie NVH performance). Therefore, it is necessary to use the CAE method in the design stage of the engine cover. Fatigue durability analysis. [0003] When performing dynamic fatigue analysis on the engine cover, it is first necessary to place it in the interior body to obtain the acceleration history of each attachment position between the body and the chassis in the road test, and secondly, the fatigue damage of the whole vehicle is cal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/15G06F119/04
CPCY02T90/00
Inventor 谢敏捷曾小利赵松王华
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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