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 development costs. Effect

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 development costs. Effect

CN102867075AActive Publication Date: 2013-01-09ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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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 drawings and specific embodiments.

[0038] Such as figure 1 The illustrated embodiment is an optimization design method for vehicle body floor based on acceleration frequency response analysis, which includes the following steps:

[0039] (1) Obtain the design input conditions of the body floor according to the body shape and layout data;

[0040] (2) According to the design input conditions, carry out preliminary structural design of the car body floor, and establish a CAD model through CATIA software;

[0041] (3) Mesh the established CAD model and establish the finite element model of the white body; 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. The pre-processing software can use Hypermesh;

[0043] Mesh the data, and use shell elements as the element type;

[0044] Assign correspon...

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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 optimized design method of a vehicle body floor, in particular to a highly reliable vehicle body floor optimization design method based on acceleration frequency response analysis. 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, the analysis of the vibration performance of the car floor at the beginning of the car design will have an extremely important impact on improving the vibration resistance of the vehicle. [0003] Chinese Patent Publication No.: CA101916322A, the date of authorization announcement on December 15, 2010, discloses an optimized design method for car door sagging based on CAE structural analysis, including steps: obtaining design input conditions from the body layout and styling; Create a CAD model through modeling software; mesh the CAD model; simulate the actual situation t...

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Application Information

Patent Timeline
09 Jan 2013
Publication
CN102867075A
IPC
G06F17/50
CPC
Y02T90/00
Inventors
王亮; 朱贞英