某车型排气系统静力和模态分析
Static and Modal Analysis of Exhaust System of a Vehicle

以某排气系统为研究对象，通过CATIA和HyperMesh构建该模型和网格，通过OptiStruct对其进行静力分析以确保结构强度；再对该模型进行模态分析以确保该模型在怠速频率下不会发生共振。通过1G静力分析，该排气系统的三个挂钩受力、位移均符合要求；4G静力分析证明三个挂钩的应力、管道的焊缝应力符合要求。模态分析在怠速频率下未出现Z向弯曲模态。故该模型的结构强度和模态均符合要求。
Taking an exhaust system as the research object, the model and grid are constructed through CATIA and HyperMesh, and the static analysis is carried out through OptiStruct to ensure the structural strength; then the modal analysis of the model is carried out to ensure that the model will not resonate at idle frequency. Through 1G static analysis, the stress and displacement of the three hooks of the exhaust system meet the requirements; 4G static analysis shows that the stress of the three hooks and the weld stress of the pipeline meet the requirements. In modal analysis, there is no Z-bending mode at idle frequency. Therefore, the structural strength and mode of the model meet the requirements.