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  • 學位論文

受側向拘束大變形銷接樑的變形地圖

Deformation map of pinned-pinned constrained elastica

指導教授 : 陳振山

摘要


在本文中,我們研究了兩端銷接並受對稱橫向拘束的彈性板條(elastica)變形及穩定性分析。其中的橫向拘束包含剛性壁與彈簧壁,這是一個高度非線性的力學問題在一個固定負載下可能會存在數個平衡位置。文中使用shooting method做靜態分析,做出所有的變形軌跡(load-deflection curves),構成橫軸為負載、縱軸為端點位移的變形地圖(Deformation map),並比較剛性壁與撓性壁拘束下變形軌跡的差異,以及在不同的彈簧常數對其變形軌跡的影響。在振動分析中,本文以振動法去檢驗各式變形的穩定性,以靜態結果為基礎,分別用負載控制與位移控制檢視各變形的穩定性。

關鍵字

挫曲樑 面拘束 彈簧牆 穩定性

並列摘要


無資料

並列關鍵字

line constrained elastica stability winkler

參考文獻


[1] A. Klarbring, On discrete and discretized non-linear elastic structures in unilateral contact (stability, uniqueness and variational principles), Int. J. Solids Struct. 24 (1988) 459-479.
[2] X. Chateau, Q.S. Nguyen, Buckling of elastic structures in unilateral contact with or without friction, Eur. J. Mech. A-Solid 1 (1991) 71-89.
[3] R.S. Manning, G.B. Bulman, Stability of an elastic rod buckling into a soft wall, Proc. R. Soc. A 461 (2005) 2423-2450
[4] J.-S. Chen, C.-J. Lu, C.-Y. Lee, On the use of energy method with element splitting to determine the stability of a constrained elastica, International Journal of Non-Linear Mechanics 76 (2015) 77-86.
[5] J.-S. Chen, W.-C. Ro, Deformations and stability of an elastica subjected to an off-axis point constraint, ASME Journal of Applied Mechanics 77 (2010) 031006, 2010.

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