頁籤選單縮合
題 名 | CESARO平均與門檻頻率在反卷積分析之應用=Application of Cesaro Mean and Threshold Frequency to Deconvolution Analysis |
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作 者 | 陳立言; 陳正興; 李洋傑; | 書刊名 | 高苑學報 |
卷 期 | 5:2 1996.08[民85.08] |
頁 次 | 頁217-226 |
分類號 | 441.103 |
關鍵詞 | 反卷積分析; Cesaro平均; 放大作用之門檻頻率; Deconvolution; Cesaro mean; Threshold frequency of amplification; |
語 文 | 中文(Chinese) |
中文摘要 | 利用SHAKE程式進行地盤運動之反卷積分析時,常因地表地震記錄含有高頻雜訊以及分析模式之高頻放大作用,而使得反卷積分析之結果極不合理,甚至,發散。本文探討高頻放大作用之根本原因,提出放大作用之門檻頻率的觀念,並應用Cesaro平均之理論處理反卷積分析之發散問題,以有效消除高頻率雜訊之干擾。 |
英文摘要 | The computer program SHAKE is often used for the ground re-sponse analysis under earthquake excitations. However, the model when used for deconvolution analysis will have very large amplification effects over the high frequency range. The deconvoluted ground motions at deeper depth may become unrealistic or even divergent due to a small amount of high frequency noise existing in the accelerogram of the ground surface. This paper investigates the fundamental mechanism of high fre-quency amplifications. The threshold frequency at which the transfer function begins to have amplification effect is identified, and the Cesáro mean is utilized to suppress the amplification effects over the high fre-quency part. Accordingly, the divergent problem in ground motion de-convolution analysis can be avoided. |
本系統中英文摘要資訊取自各篇刊載內容。