船体薄壁梁动力分析及模型试验研究

Dynamic Analysis and Model Test on Hull Thin-Walled Beams

本文应用 Kollbrunner-Hajdin 修正的薄壁梁理论建立了薄壁梁动力方程。在公式推导中考虑了 Venant ST 剪应力,所得结果可适用于开、闭口及混合剖面的船体薄壁梁.同时还考虑了甲板条、横向抗扭箱等附属构件对船体薄壁梁频率的影响。为了验证本文方法和程序的可靠性,进行了薄壁梁模型试验,结果表明,理论计算与试验值是吻合的.

Applying the thin-walled beam theory improved by Kollbrunner-Hajdin,the paper sets up the dy- namic equation and the flow diagram of the thin-walled beam.As considering S.T.Venant shear stress,the conclusion is suitable for the hull thin-walled beams with opened or closed or mixed sections. The paper also considers the effects of cross beck stripes and cross torsional bulkheads on the frequency of the hull.Checking the equation and the program by the model tests of the thin-walled beam,the re- suits show the method presented is reliable.