基于有限元法的发动机罩模态分析研究

Study on FEM-Based Model Analysis of Engine Hood

建立了某轿车发动机罩有限元模型,对其进行了模态分析计算,得到发动机罩的固有频率和振型。运用HYPERMESH与NASTRAN软件对发动机罩进行了模态分析计算,得出发动机罩的低阶模态特性。总结优化发动机罩模态特性的方法,以解决发动机怠速时发动机罩的振动问题。

FEM model was built and model analysis was executed for the engine hood of an Auto, summarized the natural frequencies and vibration type. Engine hood of this Auto was optimized with HYPERMESH and NASTRAN software, and get the low modes of it. Summarize the method of optimizing engine cover modal characteristics to solve the problems of the vibration of engine hood as engine is idling.