负刚度 meaning in English

negative rigidity
negative stiffness

At the same time , plastic hinge , rigid zone , negative stiffness , load relaxing and so on are taken into account
该方法一并考虑了塑性铰、节点刚域、负刚度及单元卸荷等问题。
The elastic methods are beam - columns method , the pseudo load method , the pseudo lateral load method , the iterative gravity load method and the negative rigidity method
常用弹性分析的方法有：梁柱法、虚拟荷载法、虚拟侧向荷载法、迭代重力荷载法和负刚度法。
( 3 ) in order to solve the negative stiffness problem in structural numerical analysis , the multi - spring method is set forth and its general iterative equations are deduced . several loading
( 3 )为解决结构的负刚度问题提出了多维虚设弹簧法的概念,并对多维虚设弹簧法求解的一般迭代格式进行推导。
4 . because there are sub - elements in a member with the introduction of inner joints , when tile spatial stifmess matrix of main joints of a member is made , there are some cases of solving the double nonlinear equations , negative stifmesses , and singular stiffness matrices in process of iterating
4 、由于引入了内结点，构件存在子单元，在形成主节点的构件空间单元刚度矩阵时，存在双重非线性方程求解，迭代过程中负刚度和刚度矩阵奇异问题。