little sd 中文意思是什麼
little sd
解釋
利特爾灣-
B ) relative velocity response spectrum ( sv ) and relative displacement response spectrum ( sd ) : the variation of velocity spectrum with depth is similar to that of acceleration spectrum. but the variation of displacement spectrum with depth is a little different to that of acceleration and velocity spectrum. that is, in strong earthquake, the variation of displacement spectrum and normalized spectrum in different depth is very small
（ 2 ）速度反應譜（ s 、 ）和位移反應譜（ sd ）沿深度變化的規律速度反應譜沿深度變化的特點與加速度反應譜基本相似;位移反應譜沿深度變化的特點與加速度和速度反應譜有較小差別，即強震時位移反應譜和標準位移反應譜沿深度的變化很小。
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