起重机的动力刚度是指起重机结构抵抗由于外加动力引起振动的能力。结构的静刚度通常用结构在静载作用下的挠度衡量;结构的动力刚度则表现为在动力作用下结构振动的状态。使用经验、实测数据以及理论分析表明,刚性差的结构不仅在静载作用下的挠度大,而 Crane’s dynamic stiffness refers to the ability of the crane structure to resist vibrations caused by applied power. The static stiffness of the structure is usually measured by the deflection of the structure under static load. The dynamic stiffness of the structure is expressed as the state of vibration of the structure under the dynamic force. Experiences, measured data and theoretical analysis show that the structure with poor rigidity not only has large deflection under static load,