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題 名 | 三維顆粒堆積受水平振動之斜坡傾角變化=Relaxation of Angle of Repose for Three Dimensional Granular Material under Horizontal Vibrations |
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作 者 | 周憲德; 張藝耀; | 書刊名 | 力學 |
卷 期 | 16:2 2000.12[民89.12] |
頁 次 | 頁153-160 |
分類號 | 441.2 |
關鍵詞 | 安息角; 水平振動; 顆粒; 堆積; Angle of repose; Horizontal vibration; Granular material; Particle heapings; |
語 文 | 中文(Chinese) |
中文摘要 | 本文以理論分析及振動臺實驗探討三維顆粒堆積之安息角在水平振動下之變化機 制。本文首先以理論分別推導出三維顆粒堆積斜坡之靜止安息角,水平振動作用下平衡安息 角之折減,及振動過程中傾斜角隨時間之遞減模式,而振動臺之實驗結果與理論分析相當符 合。 本文建立堆積之最終平衡角度�檎趥P振動加速度之相對振幅 a/g 之關係式,該式可用 於山區土石堆積在地震時之穩定分析。顆粒堆積受水平振動時,其傾斜角之變化量主要反應 於振動初期,而傾斜角之變化率與傾斜餘角之關係為非線性,且其非線性隨振動加速度之加 大而增高。 |
英文摘要 | The relaxation of the angle of repose for granular material under horizontal vibrations is examined in this study by employing both theoretical analysis and experimental work. The angle of repose for the three-dimensional granular mound, both at rest and under horizontal vibrations, is derived theoretically based on the particle stability analysis. The derived relationships agree well with present experimental data. The relaxation process of the inclined angle under horizontal vibrations is formulated based on a nonlinear model. The nonlinearity related to the depth of fluidized zone increases with the increasing amplitude of the horizontal forcings. |
本系統中英文摘要資訊取自各篇刊載內容。