几何参数对加肋凹型锥环柱极限承载能力影响

摘要

The failure mechanism of the large-scaled ring-stiffened concave cone-toroid-cylinder hull under static water pressure was direct analyzed in ANSYS.The effects of geometric parameters upon ultimate bearing capacity and failure mode of the ring-stiffened concave cone-toroid-cylinder hull were studied.It was concluded that decreasing the half-cone angle, increasing the thickness of the toroid shell and the size of ribs next to the toroid shell are helpful to enhance entire structure's ultimate bearing capacity;and increasing the ribs size in width is better to enhance the stability of the toroid shell.%利用ANSYS有限元软件分析大尺寸加肋凹型锥环柱在静水压力作用下的破坏机理,采用单一变量法,分析几何参数对加肋凹型锥环柱结合壳的极限承载能力和破坏模式的影响.减小半锥角、适当增加环壳厚度及环壳两端肋骨尺寸有利于提高环壳的稳定性和结构整体的极限承载能力,提高环壳肋骨腹板尺寸,能更有效提高整体结构的极限承载能力;增加肋骨的水平方向尺寸能更好地提高环壳的稳定性.