• 1. nonlinear restoring force: 非线性恢复力
• 2. nonlinear restoring force model: 非线性恢复力模型

• 1.The on-line identification algorithm can identify the nonlinear restoring force and the changes in structural parameters in real time.
  在线识别算法可以实时地识别出结构非线性回复力和结构参数的变化。
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• 2.Method for computing the element restoring force, rather than the stiffness matrix, is the most important factor that determines the accuracy of a geometric nonlinear finite element problem.
  几何非线性单元的精度主要决定于单元恢复力的计算方法，刚度矩阵对单元精度的影响很小。
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• 3.Then on the basis of experiment, a restoring force model of reversal skeleton curve of SRC wall was built, and this model can be used in nonlinear seismic analysis of SRC structures.
  在试验的基础上，本文建立了型钢混凝土剪力墙恢复力骨架曲线的数学模型，为分析高层结构的非线性地震反应分析提供了基础数据。
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