基于MR的船用减振抗冲隔离器力学特性研究

Mechanical behaviors of a marine vibration-reduction and shock-resistant isolator based on MR

针对普通隔离器不能兼顾低频减振与高频抗冲击这一问题,提出了一种新型的船用减振抗冲隔离器系统.此隔离器由钢丝绳弹簧和磁流变阻尼器并联组成,应用磁流变阻尼器的高阻尼和阻尼可控性,使该隔离器的力学性质可控,进而实现协调解决船舶设备的低频减振和高频抗冲击问题.在对隔离器抗冲减振性能的研究中,采用模型试验方法进行数值分析,得到相应的数值结果.研究结果表明,隔离器系统对振动及冲击响应有较好的控制作用,尤其体现在抑制系统共振和控制系统的低频振动上.

General purpose isolators can not meet the requirements for low-frequency vibration reduction and high-frequency shock resistance in a single design. In this paper, a new-style isolator system for ships is presented, which is composed of steel wire springs and magnetorheological （MR） dampers connected in parallel. The controllable high damping property of MR damper make it possible for us to control the mechanical property of the isolators, achieving the function of vibration reduction at low frequencies and shock resistance at high frequencies, thus better protecting ship equipments. In the researching process, physical experiments were conducted and data collected for numerical analysis. The results indicated that the new isolator has good active control effects on vibration and shock and is particularly good at controlling resonance and low-frequency vihration.