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中文摘要: 随着航空航天领域机械结构的大型化、柔性化发展，减振隔振愈发重要。设计了一种具有非线性刚度和非线性阻尼的正负刚度并联的低频隔振器，其负刚度特性和正刚度特性分别由两组倾斜弹簧和一根竖直弹簧实现；研究了隔振器的高静刚度低动刚度特性和阻尼特性，并对其隔振带宽进行分析，比较了分别由两组斜弹簧和一组斜弹簧实现负刚度的两种隔振器的刚度特性；利用谐波平衡法求解隔振器动力学响应，推导了隔振器振幅放大系数和振动传递率的表达式；通过数值仿真对比验证了谐波平衡法求解的系统响应的正确性，详细研究了所设计的正负刚度并联隔振器的刚度，阻尼及激励幅值等因素对振幅放大系数和振动传递率的影响
Abstract:A low frequency vibration isolator with nonlinear stiffness and nonlinear damping was proposed. The characteristics of negative stiffness and positive stiffness were realized by two groups of inclined springs and a vertical spring. The high static stiffness and low dynamic stiffness and damping characteristics were studied. The bandwidth of the vibration isolator was analyzed. Besides, the stiffness characteristics of two kinds of vibration isolators, which are composed of two groups of inclined springs and one group of diagonal springs respectively, were compared. The dynamic response of the vibration isolator was determined analytically using the harmonic balance method, and the expression of amplitude magnification coefficient and the vibration transfer rate was derived. The correctness of the system response of the harmonic balance method was verified by numerical simulation. The effects of stiffness, damping and excitation amplitude on the amplitude amplification factor and the vibration transfer rate of the vibration isolator were studied in detail.
文章编号：20190510 中图分类号： 文献标志码：
基金项目:北京市自然科学基金（1182010）；北京市西城区优秀人才培养计划拔尖团队项目
| 作者 | 单位 |
| 刘彦琦 | 北京市劳动保护科学研究所 |
| 王好奎 | 机械结构非线性振动与强度北京市重点实验室； 北京工业大学机械工程与应用电子技术学院 |
| 黄庭轩 | 上海航天控制技术研究所 |
| 曹东兴 | 机械结构非线性振动与强度北京市重点实验室； 北京工业大学机械工程与应用电子技术学院 |
引用文本：
刘彦琦,王好奎,黄庭轩,曹东兴.一种正负刚度并联低频隔振器的刚度和动力学特性分析[J].飞控与探测,2019,(5):68-77.
刘彦琦,王好奎,黄庭轩,曹东兴.一种正负刚度并联低频隔振器的刚度和动力学特性分析[J].飞控与探测,2019,(5):68-77.