指设计时应满足的刚度条件。是指固体材料在外力作用下抵抗变形的能力。
在负刚度条件下，该法是收敛的和条件稳定的。
In the case of negative stiffness, the method is convergent and conditionally stable.
除强度条件外，环境刚度条件是发震的另一必要条件。
Besides the strength condition, the environmental stiffness condition is another one necessary for shock-generation.
以岩层控制中的关键层理论为指导，应用弹性板理论建立了关键层的刚度条件和强度条件。
Under the guidance of key layer theory in strata control, the conditions of stiffness and strength for key layer are established by using elastic slab theory.
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