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Modal Analysis and Optimization on Body-in-white of Car

Author: WangChengMing
Tutor: ShiQin
School: Hefei University of Technology
Course: Vehicle Engineering
Keywords: Body in White Finite element model Modal Analysis Sensitivity Analysis Optimization Analysis
CLC: U463.821
Type: Master's thesis
Year: 2007
Downloads: 532
Quote: 12
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Abstract


The body is the key assembly of the car , its structure determines the mechanical characteristics of the vehicle . BIW low-level modal analysis of the overall stiffness of the body structure to inspect and guide people to the body structure optimization analysis . In this paper, a white car body established finite element model , the model is a low-level modal analysis . The actual kind of car the modal test test , the dynamic parameters of the body-in-white , on an experimental basis to verify the reliability of the finite element model . Also analyzed in the analysis of the body-in-white model with low-order modal frequency of the glass body model , with white body modal frequencies are compared explore glass body stiffness . Taking into account the thickness of its low-order modal frequencies white body cover member when the frequency sensitivity analysis on the thickness of the main member , a thickness of each member to determine the influence the size of the low-order frequency BIW . Provide a theoretical basis for the selection of parameters of design variables in the subsequent optimization design . Sensitivity analysis based on the extraction of low-level modal frequencies affect larger parts were optimized . Thickness of the design variables can be determined depending on the purpose of optimizing the different objective functions , optimization design . In the case of understanding of the relevant research , the main consideration , the lightweight body and low-order modal frequency increases both the optimization problem . The research system dynamic analysis of the body-in-white , \. The subject further optimization of the structure of the body has a certain reference value .

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Cab and body > Car body > Car Body
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