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題 名 | 對時間積分之運動方程式在擬動態試驗上之應用=Integrated Equations of Motion in Pseudodynamic Tests |
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作 者 | 張順益; 蔡克銓; 陳冠州; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 9:4 1997.12[民86.12] |
頁 次 | 頁617-625 |
分類號 | 441.571 |
關鍵詞 | 時間積分; 外力急遽變化; 線性化誤差; Time integration; Rapid changes of external force; Linearization error; |
語 文 | 中文(Chinese) |
中文摘要 | 在擬動態試驗方法中,將運動方程式對時間積分一次以做為控制方程式是一種非常有潛力的試驗方法。在本文中,此一對時間積分的技巧將被應用到Newmark的外顯示積分法中,並進行一系列的比較研究。相對於一般擬動態試驗慣用的Newmark外顯式積分法,此積分型式的Newmark外顯式積分法具有三項非常重要的優點:(1)呈現較小的誤差傳播效應,(2)能更有效率的抓住外力急遽變化的特性,以及(3)大幅度減少線性化誤差。這三項重要的改進都已獲得理論的證明並經由實際的擬動態試驗得到驗證。因此,在積分型的Newmark外顯式積分法中將可採用較大的時間步長,以減少擬動態試驗的總步數,進而減少誤差傳播的累積效應,最後得到更可靠的試驗結果。是以在此強力的推薦利用此積分技巧於適當的逐步積分法以進行擬動態試驗。 |
英文摘要 | It is very promising to use the integral form of the equations of motion as the governing equations for a structural system in the pseudodynamic testing. testing. The incorporation of this time integration technique into the Newmark explicit method is investigated in this paper. The main advantages of using the integral form of Newmark explicit method in a pseudodynamic test are:(1) a less error propagation effect, (2) a better capability in capturing the rapid changes of dynamic loading and (3) the superior property in eliminating the adverse energy addition or dissipation. The improvements have been verified by theoretical studies and experimental tests. A larger time step resulting in less error propagation and more accurate test results than that for the original Newmark explicit method may be used in the pseudodynamic test. Application of the proposed time integration technique to the direct integration method for pseudodynamic testings is recommended. |
本系統中英文摘要資訊取自各篇刊載內容。