摘要
本文对上部结构的双线型恢复力进行最小二乘法拟合，得到类似于Ｄｕｆｆｉｎｇ振子的恢复力曲线模型，地基上简化为集中参数模型，运用多尺度法研究地基－结构相互作用体系在强激励下当频率接近结构的三分之一固有频率（超谐共振）、三倍固有频率（亚谐共振）时的非线性动力行为，并通过算例得到了异频振动时一些有益的结论．
In this paper, Duffing oscillator's model is taken as a restoring force of the superstructure, and a lumped parameter model is used to simulate the viscoelastic halfspace. The perturbation analysis is used to study the conditions which give rise to the superharmonic resonance and subharmonic resonance. Then the nonlinear dynamical behavior is analyzed when the superharmonic resonance or the subharmonic resonance occurs. Some conclusions are drawn through the analysis of numerical examples.
出处
《地震工程与工程振动》
CSCD
北大核心
2001年第1期56-60,共5页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金!(59778041)
