汽车科技
汽車科技
기차과기
QICHE KEJI
2014年
1期
26-31
,共6页
车身%灵敏度分析%刚度%模态%质量优化
車身%靈敏度分析%剛度%模態%質量優化
차신%령민도분석%강도%모태%질량우화
vehicle body%sensitivity analysis%stiffness%modal%mass optimization
以某型轿车为例，建立车身有限元分析模型，对模型进行了试验验证。综合考虑零件厚度对车身质量与刚度的影响，利用灵敏度分析方法确定优化设计变量。以白车身质量最小为目标函数，在保证车身刚度和模态性能的前提下，进行车身质量优化。在车身质量减轻了6.25%的同时，车身刚度和主要模态频率也获得了不同程度的提高。
以某型轎車為例，建立車身有限元分析模型，對模型進行瞭試驗驗證。綜閤攷慮零件厚度對車身質量與剛度的影響，利用靈敏度分析方法確定優化設計變量。以白車身質量最小為目標函數，在保證車身剛度和模態性能的前提下，進行車身質量優化。在車身質量減輕瞭6.25%的同時，車身剛度和主要模態頻率也穫得瞭不同程度的提高。
이모형교차위례，건립차신유한원분석모형，대모형진행료시험험증。종합고필령건후도대차신질량여강도적영향，이용령민도분석방법학정우화설계변량。이백차신질량최소위목표함수，재보증차신강도화모태성능적전제하，진행차신질량우화。재차신질량감경료6.25%적동시，차신강도화주요모태빈솔야획득료불동정도적제고。
A finite element model for a car is built and the model is verified by test. Considering the effect of the part thickness on the body mass and stiffness, the optimization design variables are determined through the sensitivity analysis method. The optimization on the mass of the body is conducted with the objective of minimizing the body mass and meeting the requirements of the body stiffness and modal properties. The mass of the car body is reduced by 6.25%, while the stiffness and the main modal frequency are somewhat raised.
