【摘要】 对排气组件进行简化,建立排气系统一维梁振动模型,并进行整车NVH(noise,vibration and harshness)性能的数值和实验模态分析。研究结果显示,排气组件简化合理,排气系统一维模型可以较准确地描述排气系统的动力学特性,模型可用于排气系统的优化及疲劳特性预测。更多还原

【Abstract】 The exhaust system assembly of the engine is simplified to be one dimension bending beam vibration model for the analysis of the NVH(noise,vibration and harshness) performance and the fatigue strength of the exhaust system.The details of simplifications of the exhaust system are presented.Numerical and experimental efforts are made to validate the simplified model.By comparison,it is shown that the simplification is reasonable and the one dimension model can be applied to describe the dynamic characteristic of the real system parametric optimization and fatigue prediction.更多还原