边界元法是一种新的正在发展中的数值计算方法,其主要优点是仅需在物体表面离散网格,而且计算精度较高,并可广泛地应用于许多领域。本文从热传导方程出发,介绍了三维环界法的理论和数值计算方法,并在IBMPC/XT 微型计算机上开发了可解工程实际问题的三维边界元程序,同时对国产135系列柴油机活塞进行了分析计算及试验研究,结果表明,边界元法是一种有效的数值计算方法。 Boundary element method is a new and developing numerical method. The main advantage of this method is that it only needs to discrete the mesh on the object surface, and its calculation accuracy is high. It can be widely used in many fields. Based on the heat conduction equation, this paper introduces the theory and numerical calculation method of 3D Eigenvalue method. On the IBMPC / XT microcomputer, we develop a three-dimensional boundary element program that solves practical engineering problems. At the same time, we analyze the piston of domestic 135 series diesel engine Computation and experimental studies show that the BEM is an effective numerical method.