The finite-element modal analysis on the crankshaft of a high speed diesel engine are conducted with the computer version of the SUPER SAP 91 engineering analysis software and the first five orders of modal parameters are obtained. 本文利用SuperSap91微机版工程分析软件,对某高速柴油机曲轴进行了有限元计算模态分析,获得了其前五阶模态参数;