It is shown that the offset of propulsion force and the lower natural fundamental frequency are caused by asymmetry of turbopump and weakness of connection stiffness between propulsion and frame.

研究表明，涡轮泵不对称以及发动机与机架之间连接刚度弱是引起推力偏心和基频固有频率偏低的主要原因。

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For the reinforced concrete frame structures, the relationship between the story lateral stiffness and lateral load-bearing capacity is studied.

研究了钢筋混凝土框架结构层水平承载力和层抗侧移刚度的关系。

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These deformations are nonelastic, depending on the relative strength and stiffness of each component of the frame.

这种变形一般是非弹性的，其大小取决于框架中每个组成部分的相对强度和刚度。

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