带限位隔振系统的主共振响应及隔振性能研究  

Research on primary resonance response and vibration-isolation performance of vibration-isolation system with displacement restrictors

作　　者：刘海超 闫明[1] 金映丽[1] 孙自强[1] 杨宁 LIU Haichao;YAN Ming;JIN Yingli;SUN Ziqiang;YANG Ning(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870)

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870

出　　处：《机械设计》2024年第9期41-47,共7页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51705337);国防科技创新特区项目(20-163-00-TS-006-002-01)。

摘　　要：针对舰船设备带限位隔振系统中普遍存在的非线性特性,文中建立包含分段线性刚度和分段线性阻尼的限位隔振系统数学模型,采用平均法对主共振响应进行解析求解,推导出系统力传递率方程,综合分析了限位器各参数对系统幅频特性和隔振性能的影响规律,通过扫频试验进行验证。结果表明:限位器阻尼对系统振动性能具有积极意义,大阻尼限位有效减小了幅频响应峰值,降低了力传递率,减小甚至避免了跳跃和滞后现象的产生;对于任意一组系统参数都存在一个最优刚度比,使得相对位移幅值最小、隔振性能最好,同时保证了跳跃区间相对较小;适当增大限位间隙可以减小跳跃区间,进一步改善系统的振动性能。In this article,in order to explore the common nonlinear characteristics of the shipborne equipment’s vibration-i-solation system with displacement restrictors,the mathematical model is set up,which includes piecewise linear stiffness and piecewise linear damping;the average method is used for the analytical solution of the primary resonance response,and the equa-tion of the system’s force-transmission rate is derived;the in-depth analysis is conducted on the influence of the restrictors’vari-ous parameters on the system’s amplitude-frequency characteristics and vibration-isolation performance,which is verified by the frequency-sweep test.The results show that the damper has a positive effect on the system’s vibration performance.A larger damper is helpful to reduce the amplitude-frequency response peak and the force-transmission rate;also,it is beneficial to dwin-dle and even avoid the jumping and hysteresis.As for any set of system parameters,there is an optimal stiffness ratio to minimize the relative displacement amplitude;both the best vibration-isolation performance and a smaller jumping interval are ensured.The jump interval will become smaller thanks to a proper increase of clearance.As a result,the system enjoys better vibration performance.

关 键 词：非线性振动 主共振响应 力传递率 跳跃与滞后 扫频试验 

分 类 号：O322[理学—一般力学与力学基础] TH122[理学—力学]