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用摄动有限元及二阶摄动分析方法，对石油钻井塔架大腿局部存在缺陷及局部刚度加强等状态下的动特性及灵敏度进行了分析计算，并与有限元重分析的动特性计算结果作了比较，得出了前者比后者省时省力的结论。这种方法对今后设计新型塔架有很好的参考价值，也为其他工程实际结构的动力修改和优化设计提供了一种简单可靠的计算方法。
The perturbation finite element method and the second-order perturbation analysis method are used to analyze and calculate the dynamic characteristics and sensitivity of the local thigh of the oil drilling tower with local defects and local stiffness strengthening. Made a comparison, come to the former than the latter time and effort conclusions. This method has very good reference value for the design of the new tower in the future, and also provides a simple and reliable calculation method for the dynamic modification and optimization design of other engineering actual structures.