刚度是指材料或结构在受力时抵抗弹性变形的能力。是材料或结构弹性变形难易程度的表征。材料的刚度通常用弹性模量E来衡量。在宏观弹性范围内，刚度是零件荷载与位移成正比的比例系数，即引起单位位移所需的力。它的倒数称为柔度，即单位力引起的位移。刚度可分为静刚度和动刚度。
n. severity ; rigidity ; stiffness ; inflexibility
The fatigue strength, deformation and stiffness of concrete in such stress states are analyzed.
分析了定侧压双轴压砼的疲劳强度、变形性能和刚度特性。
参考来源 - 混凝土单轴、双轴动态强度和变形试验研究Load relieving of the structure is achieved by introducing the rigidity-modulating analysis method.
本文引入了变刚度法实现了环形空腹索桁结构体系的荷载缓和。
参考来源 - 环形空腹索桁结构及荷载缓和的实现The optimization parameter is: suspending system mass, rigidity, damping and the friction of join accessory .
优化参数为：悬架的质量、刚度和阻尼以及连接件的摩擦。
参考来源 - 汽车座椅弹簧的优化设计与分析A mathematical model was set up for an asymmetrical rotor-bearing system. With the help of this model the authors have analyzed the influence of a variety of factors on the stability of the asymmetrical rotor-bearing system.
建立了非对称转子-非对称轴承系统的数学模型，分析了外阻尼、转子刚度各向异性系数、支撑刚度各向异性系数及支撑相对柔性系数对转子系统稳定性的影响。
参考来源 - 非对称转子·2,447,543篇论文数据，部分数据来源于NoteExpress
论述了多工况倾斜冲击试验系统，该系统具有可变的冲击角度，刚度和行程长度。
The Multi-work Condition Declivitous Impact Testing System was introduced which has variable impacting angle, rigidity, and length of stroke.
并照着真实的翅膀进行了刚度系数上的仿生。
除了刚度，石墨烯更著名的是其有可能替代硅。
Apart from stiffness, graphene is possibly better known as a potential silicon replacement.
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