论文部分内容阅读
利用Rayleigh-Ritz法和通用有限元程序ANSYS分析了纵向边被转动弹簧或扭转加劲肋约束的正交各向异性长板的临界屈曲问题,引入无量纲正交各向异性参数、约束系数和临界屈曲系数,利用曲线拟合技术,得到了这两类约束板在均匀剪力作用下的临界屈曲载荷近似解公式;利用临界纵横比,把求得的针对转动弹簧约束的临界屈曲解应用到扭转加劲肋约束板的临界屈曲解中,同样得到了扭转加劲肋约束板的临界屈曲载荷。将求得的近似表达式与有限元ANSYS数值解以及文献中的结果进行对比,结果吻合良好。
The critical buckling problems of orthotropic long plates with longitudinal edges restrained by rotating springs or torsional stiffeners are analyzed by Rayleigh-Ritz method and general finite element program ANSYS. The dimensionless orthotropic anisotropy parameters, constraint coefficients and critical values Buckling coefficient, the approximate solution formula of the critical buckling load of these two types of constrained plates under uniform shear force is obtained by using the curve fitting technique. By using the critical aspect ratio, the obtained critical buckling solution for the constraint of rotating springs is applied to the torsional In the critical buckling solution of stiffened plate, the critical buckling load of torsional stiffened plate is also obtained. The approximate expression obtained is compared with the ANSYS numerical solution and the results in the literature, and the results are in good agreement.