变刚度浮筏隔振系统功率流传递特性分析

Power Flow Transmission Analysis of Variable Stiffness Floating Raft Isolation System

设计了磁悬浮支承隔振单元结构,并应用于多自由度浮筏隔振系统。以带有刚度可调的磁悬浮支承隔振单元的隔振系统为研究对象,建立数学模型,推导出其传递到系统基础上的功率流数学表达式。通过实例分析了磁悬浮支承刚度、基础尺寸、浮筏质量,以及浮筏转动惯量对传递到基础上功率流的影响,为浮筏隔振系统的优化设计和磁悬浮隔振控制系统设计提供了可遵循的依据。

A unit of magnetic suspension isolator was designed and applied to floating raft vibration isolation system. Mulit - DOF floating raft vibration isolation system that is supported in form of parallelism by magnetic suspension isolator and ordinary vibration isolators was established. The stiffness and damping of the whole vibration - isolating system were varied by the way of adjusting the stiffness and damping af the magnetic suspension isolator. Taking the system as the research subject,the mathematic model was established, and mathematic expression of power flow transferring to the foundation of the system was calculated. The law of the variable stiffness and damping of magnetic suspension isolator,the mass and rotation inertia of the raft and base dimensions＇ influences on the transferring power flow of the vibration isolation system were obtained. The basis for the optimizing design of the raft vibration isolation system and magnetic suspension control system was provided.