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空间弹性细杆在扭矩作用下的屈曲 被引量:5

Buckling of a Spatial Elastic Thin Rod Under Torque
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摘要 用有限元方法研究了三维弹性细杆在扭矩作用下的屈曲.利用自然坐标形式的细长空间曲杆的能量方程和2节点12个自由度的自然坐标形式的三维曲梁单元,采用特征值分析方法,研究分析了同时受有轴力和扭矩作用时的空间弹性细杆的屈曲问题.数值结果与存在的理论解极为吻合.具有一定曲率和挠率的空间细长曲杆,其临界扭矩值与扭矩的指向有着极其明显的关系. The flexural buckling of a spatial elastic thin rod under torque is discussed with FEM(finite element method). In a natural coordinate system, an energy equation is given, which considers nonlinear terms of the tortuosity about an initially curved and twisted thin rod with circular cross-section. An eigenvalue analysis is proposed to study the buckling of spatial elastic thin rods with simultaneous effect of axial force and torque. The method is clearly demonstrated by examples. Numerical results are in good agreement with theoretical solutions.
出处 《计算物理》 EI CSCD 北大核心 2006年第4期447-450,共4页 Chinese Journal of Computational Physics
基金 江苏省高校自然科学研究计划项目(05KJB410015) 航空科学基金(04B52006)资助项目
关键词 屈曲 有限元 弹性细杆 buckling finite elements elastic thin rods
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参考文献10

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