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題名 | A Uniform Representation for Dynamic Impedance Functions of Rectangular Foundations Incorporating Different Aspect Ratios=統合不同長寬比之矩形基礎動力阻抗函數表示法 |
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作者 | 吳文華; | 書刊名 | 科技學刊 |
卷期 | 7:3 1998.07[民87.07] |
頁次 | 頁259-270 |
分類號 | 440 |
關鍵詞 | 阻抗函數; 矩形基礎; 長寬比; 修正頻率參數; Impedance function; Rectangular foundation; Aspect ratio; Modified frequency parameter; |
語文 | 英文(English) |
中文摘要 | 基礎之動力阻抗為與頻率相關的複數函數,而無因次的頻率參數則通常採用來表 示其實部與虛部。另外,由以往對矩形基礎的研究成果發現,其動力阻抗函數也隨著基礎長 寬比之不同而產生變化。在本文中,作者藉由定義一個修正的頻率參數來建立另一套表示法, 以求能將與長寬比的相關性排除。從實際結果印證,利用這一套表示法及修正頻率參數,矩 形基礎的動力阻抗函數可以在實用範圍內抽離與基礎長寬比的相關性,並從而建立起一套統 合不同長寬比之動力阻抗函數表示法。 |
英文摘要 | The dynamic impedances for foundations are usually represented by a complex-valued frequency-dependent function, for which a dimensionless frequency parameter was commonly adopted to express the real and imaginary parts. From the available results for the rectangular foundations, the impedance functions were also found to be varying with the aspect ratio of the foundation. Attempting to eliminate this dependence on the aspect ratio, and alternative representation using a modified frequency parameter is proposed in this paper. It is shown that, with this formulation and modified frequency parameter, a uniform representation for the dynamic impedance functions of rectangular foundation can be successfully developed to incorporate different foundation aspect ratios. |
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