含三次非线性阻尼特性的分子弹簧隔振系统

发布时间：2018-03-05 13:48

本文选题：隔振　切入点：三次阻尼　出处：《振动与冲击》2017年11期 　论文类型：期刊论文

【摘要】：对含有三次非线性阻尼特性的分子弹簧隔振系统的隔振性能进行了仿真研究和理论分析。分子弹簧隔振器是一种具有高静低动刚度特性的新型隔振器,将MR阻尼器和分子弹簧隔振器并联,并对MR阻尼器实施PI反馈控制来模拟指定的三次非线性阻尼特性,得到兼具高静低动刚度特性和非线性阻尼特性的隔振系统。通过动力学仿真和理论分析研究了三次非线性阻尼特性对分子弹簧隔振系统的隔振性能的影响,通过谐波平衡法深入分析三次阻尼特性的隔振机理。结果表明:三次非线性阻尼特性适用于隔力,可有效抑制共振峰值同时不改变隔振频率区的隔振性能,而三次阻尼特性不适合于隔幅。
[Abstract]:The vibration isolation performance of a molecular spring vibration isolation system with cubic nonlinear damping characteristics is simulated and theoretically analyzed. The molecular spring vibration isolator is a new type of vibration isolator with Gao Jing's low dynamic stiffness. The Mr damper and the molecular spring vibration isolator are connected in parallel, and Pi feedback control is applied to the Mr damper to simulate the specified cubic nonlinear damping characteristics. The vibration isolation system with Gao Jing's low dynamic stiffness and nonlinear damping characteristics is obtained. The influence of cubic nonlinear damping characteristics on the vibration isolation performance of the molecular spring vibration isolation system is studied by dynamic simulation and theoretical analysis. The vibration isolation mechanism of the third order damping is analyzed by harmonic balance method. The results show that the third order nonlinear damping is suitable for the isolation force, which can effectively suppress the resonance peak and do not change the isolation performance of the vibration isolation frequency region. But the cubic damping is not suitable for the spacer.
【作者单位】：南京航空航天大学机械结构力学及控制国家重点实验室振动工程研究所;
【基金】：国家自然科学基金(11272145;11472127)
【分类号】：TB535.1

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