【摘要】 研究了由地基振动激励的隔振体的非线性动力响应。用变形的三次多项式函数表征隔振材料的非线性刚度特征 ,建立了被动隔振体的非线性动力学方程 ,分别用谐波平衡法和直接数值积分法研究了其非线性动力响应特性 ,得出了频率响应方程和幅频曲线 ,揭示了忽略隔振材料刚度的非线性将会导致隔振设计和隔振效果分析的显著误差。分析方法和结论对于精确进行被动隔振设计和隔振效果评价具有积极意义。更多还原

【Abstract】 Seismic responses of the body isolated by the resilient material with nonlinear stiffness are investigated. Nonlinear stiffness characteristics of the vibration isolating material are described by cubic polynomial function of its deformation. The nonlinear dynamic equation is developed. Nonlinear dynamic responses to a seismic excitation are analyzed by the method of harmonic balance and numerical integration. Frequency response equation and frequency response curves are derived. The technique and conclusions developed in the paper are very useful to the accurate design and effect analysis of vibration isolators.更多还原