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开口截面薄壁梁经典理论计算时截面形状保持不变,可忽略,假定截面扭转引起的应力和位移对根据经典理论计算的应力和位移的影响很小,研究由3块板组合而成的有2条对称轴的开口截面薄壁梁的扭曲。根据剪切影响下开口截面薄壁梁扭转理论,假定截面扭转引起的应力和变形与剪切引起的扭转角成正比。利用壳单元,将分析结果与有限元方法进行比较。通过几个实例对两种方法进行验证。
The cross-sectional shape of the thin-walled beam with an open cross section remains unchanged and can be neglected. Assuming that the stress and displacement caused by torsional section cross-section have little effect on the stress and displacement calculated according to the classical theory, there are two Section of the axis of symmetry Thin-walled beam distortions. According to the theory of torsion of thin-walled beams with open section under shear influence, it is assumed that the stress and deformation caused by torsion of section are proportional to the torsion angle caused by shear. Using shell elements, the results of the analysis are compared with the finite element method. Through several examples of two methods to verify.