关键词: 非线性振动, 简谐激励, 双线性滞迟恢复力, 响应计算, 宽频带 高增益 定向性 超材料 微带天线

Abstract: The response computation problem of a two degree of freedom bilinear hysteretic vibration system with viscous damping under sinusoidal excitation is studied. And the equivalent linearization approximate method is extended to a two-degree-of-freedom vibration system having hysteretic restoring force component, the equality in computation precision of equivalent linearization approximate method, K-B method and Fourier series expanding method in fist order approximation meaning is also proved.

Key words: Linear hysteretic restoring force, Nonlinear vibration, Response computation, Sinusoidal excitation