一种非线性隔振器的静力分析与实验研究

摘要

研究一种变刚度非线性隔振器,使该隔振器具有高静刚度低刚度的效果.根据水平铰支梁受水平力弯曲理论、刚度并联理论,分析斜薄壁梁在竖直方向力的作用下的力位移以及刚度位移特性,得到斜薄壁梁结构在竖直力作用下具有负刚度特性.通过与弹簧(正刚度)结构并联,理论结合实验验证一种并联结构隔振器样机,得到该样机具有高静刚度-小静变形,低动刚度-力的变化率很小.%The stiffness characteristic of a nonlinear vibration isolator is studied. Based on buckling theory, the force-displacement and stiffness-displacement relationships of an oblique thin-walled beam are analyzed, and the existence of negative stiffness is discussed. A prototype of the nonlinear vibration isolator is proposed. Its high-static and low-dynamic (HSLD) stiffness characteristics are validated by mutual comparison of the theoretical and experimental results.