研究了地质断裂面滑移的动力学行为，获得了断裂面滑移失稳的刚度准则。
The dynamic character of gravity fracture surface sliding is considered and the stiffness criterion of fracture surface sliding is proposed.
由工程应变推导出几何非线性的切线刚度矩阵，并给出判断分歧点与极限点的准则，最后用一数值例题说明该方法的分析过程。
The tangent stiffness matrix is obtained from the engineering strain and the principle for determining the limit point and bifurcation point is given.
按气体轴承刚度最大准则优化了固有节流轴承参数。
The inherent throttle bearing parameters are optimized according to the maximum stiffness of aerostatic bearing.
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