刘宗德, 韩铭宝, 王仁, 陈裕泽. 非均匀温度场压杆蠕变屈曲分析[J]. 工程力学, 1995, 12(3): 7-12.
引用本文: 刘宗德, 韩铭宝, 王仁, 陈裕泽. 非均匀温度场压杆蠕变屈曲分析[J]. 工程力学, 1995, 12(3): 7-12.
Liu Zongde, Han Mingbao, Wang Ren, Chen Yuze. CREEP BUCKLING OF COLUMNS UNDER NONUNIFORM TEMPERATURE DISTRIBUTION[J]. Engineering Mechanics, 1995, 12(3): 7-12.
Citation: Liu Zongde, Han Mingbao, Wang Ren, Chen Yuze. CREEP BUCKLING OF COLUMNS UNDER NONUNIFORM TEMPERATURE DISTRIBUTION[J]. Engineering Mechanics, 1995, 12(3): 7-12.

非均匀温度场压杆蠕变屈曲分析

CREEP BUCKLING OF COLUMNS UNDER NONUNIFORM TEMPERATURE DISTRIBUTION

  • 摘要: 本文分析了受短时热冲击压杆在非均匀温度场下的蠕变屈曲问题。控制方程考虑了几何非线性以及横截面上应力分布非线性,以内力和位移为基本未知量,在空间上以样条配点法离散,而对时间以初应力法求蠕变变形。计算结果得到了蠕变屈曲破坏的典型模式。

     

    Abstract: The creep buckling of columns with geometrical imperfections subjected to short time heat input is studied in this paper. A time hardening creep model is used to analyse creep with a nonuaiform temperature distribution along longitudinal direction of columns. Both geometric and physical noulinearities are taken into consideration in the governing equation. The internal forces and diaplacements are regarded as basic unknown variables which are discretized in space and time in terms of spline function collation point method and initial stress method, respectively. The computational results show that the buckling critical time are typically governed by the function of temperature distribution and boundary conditions in columns and the magnitude of the axial loads.

     

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