Structure optimization method for reinforcing rib of large panel of vehicle body

An optimization method and reinforcing rib technology are applied in the automotive field to achieve the effects of reducing optimization difficulty, high efficiency, and reducing the lengthening of the research and development cycle.

Pending Publication Date: 2022-08-09
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Optimizing the arrangement of the ribs can improve the mode of the large panel of the car body, and can basically solve the problem of "beating the drum". It takes repeated "trials" to find a relatively good layout

Method used

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  • Structure optimization method for reinforcing rib of large panel of vehicle body
  • Structure optimization method for reinforcing rib of large panel of vehicle body
  • Structure optimization method for reinforcing rib of large panel of vehicle body

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Experimental program
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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] like figure 1 A structural optimization method for stiffeners of a large panel of a vehicle body is shown, including the following steps:

[0033] S1. Finite element modeling of the vehicle:

[0034] According to the needs of vehicle NVH simulation analysis, a finite element model for vehicle NVH simulation analysis is established.

[0035] S2. Simulation analysis of road vibration and noise:

[0036] Based on the NVH simulation analysis of the whole vehicle, the finite element model and the random excitation of the road surface are loaded with excitation at the grounding point of the tire model, and the low-frequency road vibration and noise simulation analysis is carried out to obtain the noise responses of the right ear of the driver and the right ear of the right rear passenger.

[0037] S3. Analysis and identification of the cause of the problem:

[003...

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Abstract

The invention relates to a structure optimization method for reinforcing ribs of a large panel of a vehicle body. The structure optimization method comprises the following steps: S1, finite element modeling of the whole vehicle; s2, road vibration noise simulation analysis; s3, analyzing and identifying problem reasons; s4, carrying out model interception and modal analysis; s5, performing morphology optimization analysis; and S6, verifying an optimization result. According to the method, the optimal arrangement mode of the reinforcing ribs of the key panel can be rapidly designed through the morphology optimization analysis technology, the traditional mainstream optimization method that analysis engineers try repeatedly according to personal experience and cannot precisely design the arrangement mode of the reinforcing ribs of the key panel is improved, and it is guaranteed that one-time design of the structure, performance and the like of the key panel is qualified; the method has the advantages of high efficiency and low cost, and effectively reduces the risks of prolonged research and development period and increased research and development cost caused by later design change.

Description

technical field [0001] The invention relates to an automobile, in particular to a structure optimization method for a large panel reinforcing rib of a vehicle body. Background technique [0002] Automotive NVH performance is the user's most direct perception of the quality of the entire vehicle. Its level reflects the design and manufacturing quality of the vehicle, and is one of the important factors affecting the performance of the vehicle market. The problem of in-vehicle vibration and noise caused by the road surface is an important part of the NVH performance of automobiles. Especially for new energy vehicles, the problem of road noise will become particularly prominent without the background noise of the engine. The number of complaints from Taiwan customers (TGW) is becoming more and more serious. Through TGW big data analysis, it is found that the problem of low-frequency "drumming" is one of the common complaints of customers. Through the CAE simulation analysis an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/23G06F30/17G06F119/10G06F111/04
CPCG06F30/15G06F30/23G06F30/17G06F2119/10G06F2111/04Y02T90/00
Inventor 李红丽张森张松波王卓
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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