Three difference buckling modes of delaminated shell were considered. The influence of boundary condition, length and depth of delamination on bucklingload was analyzed.
考虑脱层壳的三种不同屈曲模态，分析了边界条件、脱层长度、深度对脱层壳屈曲载荷的影响；
2
The effects of the connectors on the critical bucklingload and the bending stress of pipes in horizontal section are analyzed.
分析了钻杆接头对水平井段钻柱屈曲临界力和弯曲应力的影响，提出了计算钻柱正弦屈曲临界力的新方法。
3
The calculation of critical bucklingload of struts is according to the condition of the end restraint.