stiffness criterion

• 1. 刚度准则: rigidity criterion | stiffness criterion
• 2. 刚度衰退准则: criteria of stiffness degradation

• 1.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.
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• 2.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.
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• 3.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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