圆柱形薄壳冲击扭转屈曲的实验研究

THE EXPERIMENTAL STUDY ON THE STATIC AND IMPACT TORSIONAL BUCKLING OF CYLINDRICAL SHELLS

本文对受冲击扭矩作用下的圆柱形簿壳扭转屈曲进行了实验研究.利用Hopkinson 扭杆使圆柱壳受阶跃扭矩作用,分析所得到的应变-时间曲线,得到了不同几何参数的圆柱壳的冲击临界扭矩M_(dcr)和屈曲波数n 及几条定性结论,同时找出了圆柱壳静力扭转屈曲行为和冲击扭转屈曲行为之间的异同.

In this paper,experimental studies are carried out on the buckling of circular cylindrical thin shellsunder impact torque.In the experiments of impact buckling;the step torque acting on shells is given by theHopkinson torsional bar.By analysing the strain-time curve obtained in experiment,the dynamic buck-ling critical torque M_(dcr)and buckling waves number n of shells with different geometric data,and somequalitative results are obtained.The buckling behavior of circular cylindrical thin shells under static andimpact torque is compared.