全地形车车架结构灵敏度分析及轻量化设计

为了快速有效地降低某全地形车生产成本,利用有限元前处理软件HyperMesh建立了某全地形车车架结构的有限元模型,运用Optistruct求解器计算其自由模态并与已有的试验结果进行对比,验证了该模型的正确性。通过Optistruct分析车架在多种工况下的应力分布和变形情况,计算其疲劳寿命并进行灵敏度分析,提出该车架结构轻量化方案,并分析优化后车架结构强度及疲劳寿命,证明了此轻量化方案具有一定的有效性。轻量化车架结构减轻了6.606 3kg,表明通过灵敏度分析能够提高结构优化效率以及轻量化效果。

Sensitivity analysis and lightweight design for the frame of all-terrain vehicles

In order to decrease the manufacture cost of all-terrain vehicles rapidly and effectively,a finite element model for the frame structure of all-terrain vehicles is built by using pre-processing software HyperMesh. The correctness of the model is verified by computing the freedom mode of all-terrain vehicles with Optisturct solver and contrasting it with existing test results. Through applying Optistruct solver and Fatigue to analyze stress distribution,deform and fatigue life of the frame under multi-conditions,and combining with sensitivity analysis results,the lightweight project of the frame is put forward. The validity of this lightweight project is identified after analyzing the optimized frame structure intensity and the fatigue life. The lightweight result show that the frame structure is lightened 6.6063 kg. At the same time,it shows that the structure optimization efficiency and the lightweight effect are enhanced by sensitivity analysis.