强度和刚度是评价闸门安全性能的重要指标。
Strength and stiffness are important index to evaluate the safe capability of gate.
中等跨度铁路桥梁在提速货车作用下，普遍出现横向刚度不足，横向振动超限问题，严重影响了运营安全和提速计划的顺利实施。
The transverse stiffness of medium-span railway bridge becomes insufficient and its transverse vibration becomes larger commonly under the raised speed freight train.
塔架是钻塔的重要组成部分，它直接关系到钻塔的使用安全。塔架的强度、刚度和稳定性设计计算的准确性是十分重要的。
Tower is the crucial part of derrick and directly affects the safety of it, so it is quite important to calculate the strength, rigidity and stability of the tower accurately.
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