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给出了一种适用于内燃机复杂零件结构分析的简便、高精度三维边界元算法，它对非均匀、非规则网格，特别是快速疏密过渡以及含有狭长单元的网格能获得较好的计算精度，从而可放宽对内燃机复杂零件边界元网格划分的要求，对简化数据准备工作、降低计算规模和节省计算时间，以及提高计算精度等具有重要的实际意义，最后以曲轴三维边界元分析为例进行了说明。
A simple and accurate three-dimensional boundary element method which is suitable for the structural analysis of complex parts of internal combustion engine is presented. It can obtain a better result for non-uniform and irregular grids, especially for rapid density transition and grids with narrow elements Which can relax the boundary element meshing requirements of complex parts of internal combustion engines. It has important practical significance to simplify the data preparation, reduce the calculation scale, save the calculation time and improve the calculation precision. Finally, based on the analysis of the crankshaft 3D boundary element As an example.