中文摘要：

以转子系统H858型离心式压缩机为研究对象，利用MSC．Patran＆Nastran软件对该转子系统弯曲振动情况下的固有频率进行分析，定义了系统振动问题的频率可靠性模式，并以此为基础，应用随机摄动技术、可靠性理论和灵敏度方法，推导出参数为正态随机变量时频率可靠性灵敏度的计算公式，并应用于转子系统弯曲振动情况下的频率可靠性灵敏度研究中，同时将理论分析结果与基于Nessus软件的有限元分析结果进行比较，进一步验证了所提方法的有效性．

英文摘要：

The rotor system（H858 compressor） is studied. The natural frequencies are obtained for the bending vibrations using the software ＂MSC.Patran ~ Nastran＂. The frequency reliability mode is defined and the equations for the frequency reliability sensitivity are mathematically expressed by using the random perturbation technique, the reliability theory and the sensitivity approach. The frequency reliability sensitivity of the rotor system is obtained by the above mentioned theory, and it is shown that the proposed method is accurate by comparing the results with the finite element results obtained by software ＂Nessus＂.