【摘要】 系统地描述了三维有限单元法中五面体等参元的基本理论，提出了采取积分换元法处理其数值积分的方法，并利用自编软件成功地将六面体等参元与五面体等参元结合在一起，对Ｓ１９５型柴油机活塞的温度场进行分析计算，计算结果与实测值相当吻合．更多还原

【Abstract】 This paper systematically describes the basic theory of isoparametric pentahedron elements in 3-D Finite Element Method, and suggests that the use of transforming integration variables is made to solve their numerical integration problems. At the end of the paper, the temperature field computation of S195 diesel engine piston has been completed, with a set of 3-D F. E. M. programmes developed by authors, in which isoparametric pentahedron and hexahedron elements joins successfully. The numerical analysis values are in agreement with the measurement.更多还原