摘要
定性讨论了采用精确法和其它数值方法计算地震动反应谱的精度和与之相关的问题。认为综合考虑精度、稳定性和效率3个因素,精确法仍然是计算地震动反应谱的首选方法。认为比值λh是影响反应谱计算精度的最重要因素,比值λ0则相对次要。讨论表明频域方法也是近似方法,不能作为度量其它方法精度的基准。指出计算地震动反应谱时,采用线性插值方法加密输入地震动,不能保证高频段反应谱的计算精度,建议深入研究这一问题以取得定量结果。
The precision and other problems in calculating response spectra by using precision method and other numerical methods are discussed. As follows are some conclusions: 1 Precision method is better than others for calculating response spectra synthetically considering three factors which are precision, stability and efficiency. 2 Ratio λ_h is the most important parameter which influences the numerical precision,and ratio λ_0 is less important than λ_h. 3 Fourier method is also an aproximate method , which can not be used as a benchmark for measuring the precision of other methods. (4) Linear interpolation technique for ground motion will result in some errors in the high frequency region for calculating response spectra by using precision method.
出处
《地震工程与工程振动》
CSCD
北大核心
2004年第6期15-20,共6页
Earthquake Engineering and Engineering Dynamics
基金
黑龙江省博士后基金项目
中国地震局责任包干项目(04-0107)
关键词
反应谱
精确法
数值精度
频域方法
response spectrum
precision method
numerical precision
Fourier method
