一个新的非线性迟滞隔振系统动力学模型

提出了一个新的非线性迟滞隔振系统的动力学模型,并导出了系统动力学模型的实用表达式。该模型由非线性刚度和非线性阻尼构造,迟滞非线性阻尼力被表示为位移的函数,从而使数值计算变得简单易行,试验中的测量工作减少。模型中的各个参数物理意义明晰,各阶刚度系数能很好地反映系统中存在的线性和非线性特性,而阻尼函数能很好地反映系统的迟滞和耗能特性,运用阻尼函数还可对隔振系统中可能存在的干摩擦阻尼、粘性阻尼及高阶阻尼等各种阻尼成分进行有效的识别。

NEW DYNAMIC MODEL FOR NONLINEAR HYSTERESIS VIBRATION ISOLATION SYSTEM

A new dynamic model for nonlinear hysteresis vibration isolation system is proposed, and the practical representation of dynamic model of the system is derived. The model is constructed by dynamic nonlinear stiffness and dynamic nonlinear hysteresis damping mechanisms, the nonlinear hysteresis damping force is denoted as the function of displacement, which makes the numerical calculation easier, and decreases amount of measuring work. The physical meanings of all parameters of the model are clear. The stiffness coefficients can reflect the linear characteristic and nonlinear ones, and the damping function can reflect the hysteresis and dissipative characteristic of the system perfectly. Using the damping function, all kinds of damping, such as viscous damping, friction damping and higher one etc., which maybe exist in the vibration isolation system, can be efficiently identified.