采用接触非线性有限元模型，分析在生理载荷下一个完整步态中人工髋关节的微动规律。
The purpose of this study is to explore the micromotion characteristics of prosthesis in gait cycle under physiological load.
用动力接触有限元法对带间隙支座的管系非线性动力响应进行分析。
The nonlinear dynamic response of piping with gapped supports is analyzed by the finite element method for the dynamic contact problem.
考虑桩周土体及桩–土接触的非线性，建立了空间轴对称有限元模型；
The spatial axisymmetric finite element model is established considering the nonlinear of the soil and the interface between pile and soil.
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