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Acceleration frequency response analysis-based body floor optimal design method

A frequency response, body floor technology, applied in the field of body floor optimization design based on acceleration frequency response analysis, can solve the problems of no error control, unable to optimize the design of body floor, etc., to achieve pleasant sound, shorten development time, and reduce errors.

Active Publication Date: 2015-01-07
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages that the design method of the prior art cannot optimize the design of the body floor, and there is no error control in the design process compared with the test data, and provides a highly reliable body floor based on acceleration frequency response analysis Optimal Design Method

Method used

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  • Acceleration frequency response analysis-based body floor optimal design method
  • Acceleration frequency response analysis-based body floor optimal design method
  • Acceleration frequency response analysis-based body floor optimal design method

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] Such as figure 1 The illustrated embodiment is a method for optimal design of a vehicle body floor based on acceleration frequency response analysis, including the following steps:

[0039] (1) According to the body shape and body layout data, obtain the input conditions of the body floor design;

[0040] (2) Carry out preliminary structural design for the body floor according to the design input conditions, and establish a CAD model through CATIA software;

[0041] (3) Carry out grid division on the established CAD model, and establish the finite element model of the body-in-white; figure 2 The finite element model shown. The specific process is:

[0042] Import the CAD model into the finite element pre-processing software with CAD structure, and the pre-processing software can use Hypermesh;

[0043] The data is divided into grid...

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Abstract

The invention discloses an acceleration frequency response analysis-based body floor optimal design method, which comprises the following steps of: acquiring a body floor design input condition; establishing a CAD (Computer Aided Design) model; establishing a finite element model; performing mode CAE (Computer Aided Engineering) analysis on the finite element model to perform mode test on a white body sample; performing benchmarking; checking and verifying the finite element model according to a benchmarking result; searching a region of a large vibration displacement of the white body floor in the finite element model according to a mode CAE analysis result, extracting an inspection point from the region, and performing acceleration frequency response analysis on the inspection point; and modifying the floor design input condition according to the acceleration frequency response analysis result until the vibration response requirement is met. The method has the characteristics of shortening the development time, reducing the development cost, improving the entire noise, the vibration and the comfort, reducing the error between the finite element model and the floor sample and keeping high design quality.

Description

technical field [0001] The invention relates to an optimal design method for a vehicle body floor, in particular to an optimal design method for a vehicle body floor based on acceleration frequency response analysis with high reliability. Background technique [0002] The car floor is an important part of the car body. Since the car floor is located at the bottom of the car body and is very close to the vibration source, analyzing the vibration performance of the car floor at the beginning of the car design will have an extremely important impact on improving the shock resistance of the vehicle. [0003] Chinese patent publication number: CA101916322A, authorized announcement date December 15, 2010, discloses an optimal design method for car door sagging problem based on CAE structural analysis, including steps: obtain design input conditions from the overall layout and shape of the car body; Create a CAD model through modeling software; divide the CAD model into a mesh; sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 王亮朱贞英袁连太门永新李功赋赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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