CAJ | 학술논문

建立了某轿车车身有限元模型,由有限元分析求得车身固有频率与刚度值,并通过模态试验验证了该模型的合理性.根据车身构件的灵敏度分析结果选择设计变量,在提高车身刚度和动态性能的前提下,以轻量化为目标优化车身构件厚度,使车身总质鼍减轻了9.7%;刚度和固有频率也都有所提高.
건립료모교차차신유한원모형,유유한원분석구득차신고유빈솔여강도치,병통과모태시험험증료해모형적합이성.근거차신구건적령민도분석결과선택설계변량,재제고차신강도화동태성능적전제하,이경양화위목표우화차신구건후도,사차신총질타감경료9.7%;강도화고유빈솔야도유소제고.
The finite element model for a car body is established, its natural frequency and stiffness are obtained by finite element analysis, and the rationality of the model is verified by modal test. The design variables are selected based on the results of sensitivity analysis on body panels. On the premise of raising stiffness and dy-namic performance of vehicle body, an optimization is conducted on the thickness of body panels with lightweighting as objective, resulting in a 9.7% rise in the total mass of vehicle body with certain increase in both stiffness and natural frequency.