本文给出接近临界角吋，地球形状的全部一阶摄动和二阶长期摄动的计算方法。
This article gives the computing methods of all first order pertubations and second order secular pertubations about the oblate earth in the vicinity of critical inclination.
本文基于二阶摄动技术研究叶片强度分析的随机有限元方法。
Based on the second-order perturbation technique, the stochastic finite element method (SFEM) of the strength analysis of the turbine blade is introduced in this paper.
笔者探讨了这一方法，考虑土性分布参数和荷载变异性，用二阶摄动随机有限元法进行了浅地基沉降的概率分析。
This study calculated the statistical moments of settlement for shallow foundation by using second-order perturbation stochastic finite element method.
笔者探讨了这一方法，考虑土性分布参数和荷载变异性，用二阶摄动随机有限元法进行了浅地基沉降的概率分析。
This study calculated the statistical moments of settlement for shallow foundation by using second-order perturbation stochastic finite element method.
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