求解结构地震反应能量的两种计算方法比较

Comparison of Two Methods of Computing Seismic Response Energy of Structure

为了比较基于时域直接积分和基于小波变换空间的两种计算地震反应能量的方法和各自的优点,推导了基于小波变换空间的地震反应能量的计算方法,通过实例研究同一个结构在不同地震波作用下的两种能量计算方法。算例分析表明:两种能量计算方法都有各自的优势,基于时域直接积分计算结构地震反应的能量,揭示了地震反应中结构的能量吸收与耗散之间的本质关系;而基于小波变换空间的能量计算方法更能够按频率真实地体现地震动能量的分布,明确地震波在结构传播过程中能量的变化规律。

The two methods of seismic response energy computation respectively based on time domain immediate integration and wavelet transform were studied. And the energy computation based on wavelet transform was deduced. Through practical case,the response energies of same structure under different seismic waves were computed respectively by the two methods. The results show that each of the two energy computation methods has its respective advantages. The energy computation method of time domain immediate integration can reveal the nature of the relationship between the seismic responses of the structure of energy absorption and dissipation. The energy computation method of wavelet transform may practically reveal the distribution of seismic energy by spectrum,and define the energy change in the diffusion of seismic wave in structure.