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系统研究了基础弹性对单层隔振系统、双层隔振系统及浮筏隔振系统隔振性能的影响。分析了不同隔振系统与不同弹性基础间的振动耦合特性,讨论了不同隔振系统的振级落差和力传递率特性,给出了振级落差和力传递率的简化计算方法。针对不同隔振系统的有源隔振问题,比较了不同作动器安装方式所需的控制力。研究表明,对于所有隔振系统,增加基础的刚度和阻尼有利于提高振级落差和力传递率;对于浮筏隔振系统,增加筏架的刚度和阻尼有利于提高隔振性能和减少有源隔振所需的控制力。
The effect of base elasticity on the vibration isolation performance of single-layer vibration isolation system, double-layer vibration isolation system and floating-raft vibration isolation system is systematically studied. The vibration coupling characteristics between different vibration isolation systems and different elastic foundations are analyzed, and the characteristics of the vibration isolation and force transmission of different vibration isolation systems are discussed. A simplified calculation method of the vibration level drop and force transmission rate is given. Aiming at the problem of active vibration isolation of different vibration isolation systems, the control force required by different actuator installation methods is compared. The research shows that for all the vibration isolation systems, increasing the stiffness and damping of the foundation will help to improve the vibration level drop and force transfer rate. For the floating raft vibration isolation system, increasing the stiffness and damping of the raft will improve the vibration isolation performance and reduce the active Vibration isolation required control.