大功率柴油机组合结构建模技术研究

利用特征建模技术和参数化建模技术建立了某大功率柴油机机体、曲轴三维实体模型，并用虚拟材料模拟组合结构机体 曲轴结合面的动力学特性。在此基础上，采用动态子结构法建立了机体和曲轴组合结构的动力学模型，对其进行了有限元模态分析，用试验模态分析结果对模型进行了修正。结果表明文中所提出的组合结构建模技术及结合面的模拟技术可以运用到发动机其他零部件组合结构的分析中，并可进一步推广到其他机械组合结构的研究

Modeling Technology Study on The Combined Structure of Heavy Duty Diesel

The 3 dimensional solid models of cylinder block and crankshaft of a heavy duty diesel engine are built up by using feature and parametric modeling technology. Dynamic sub structure method and imaginary material are used to simulate the dynamic properties. Finite element modal analysis and modal testing modify the models. This modeling technology can be applied to the other combined parts structure of an engine even the other mechanical combined structure.