Three different finite element method (FEM) modelling approaches of bolt connections of a four-stroke, four-cylinder petrol engine are presented, and the related results compared in terms of preprocessing time and accuracy. A full 3D modelling of the bolt connections was preliminarily validated through a comparison with experimental test data available for the whole engine. Two further modelling approaches, a 1D approach and a contact-based (0D) approach, were benchmarked considering their influence on the accuracy for the dynamic analysis of an engine. Each of the three approaches presented pros and cons, even if the 1D modelling could be envisaged as the recommended one in most of cases.

中文翻译：

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汽车发动机动力分析的螺栓连接有限元建模方法

提出了四冲程，四缸汽油发动机螺栓连接的三种不同的有限元建模方法，并在预处理时间和精度上对相关结果进行了比较。通过与整个发动机可用的实验测试数据进行比较，初步验证了螺栓连接的完整3D建模。考虑到它们对发动机动态分析精度的影响，对另外两种建模方法（一维方法和基于接触的（0D）方法）进行了基准测试。即使可以将一维建模作为大多数情况下的推荐方法，这三种方法也各有利弊。