某铝制乘用车白车身疲劳寿命计算

The fatigue life calculation of the body-in-white of an aluminum passenger car

对该款铝制乘用车白车身利用Hypermesh建立了其有限元模型,在此基础上结合六分力轮测得的短波路路况下的载荷谱数据,利用Ncode对该车进行了疲劳寿命计算。在计算过程中,相比于通用的计算步骤,文中通过建立简化的悬架模型,提出了一个简化方法。最后,根据计算结果指出在该类型乘用车设计中,针对疲劳需要重点关注的位置。

The finite element model of the white body of aluminum passenger car was established by using Hypermesh.Based on this,the load spectrum data of the short-wave road measured by six-force wheel was used to calculate the fatigue life of the car with Ncode.In the calculation process,compared with the common calculation steps,this paper presents a simplified method by establishing a simplified suspension model.Finally,according to the results of the calculation,we point out the positions that need more attention for fatigue calculation in this type of passenger car design.