A symplectic method of numerical simulation on local buckling for cylindrical long shells under axial pulse loads

被引：0

作者：

Li K. ^{[1
]}

Qu J. ^{[1
]}

Tan J. ^{[1
]}

Wu Z. ^{[1
]}

Xu X. ^{[1
]}

机构：

[1] State Key Laboratory of Structure Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian

来源：

SDHM Structural Durability and Health Monitoring | 2021年 / 15卷 / 01期

关键词：

Axial pulse load; Buckling analysis; Cylindrical long shell; Hamiltonian system; Local buckling; Symplectic method;

D O I：

10.32604/sdhm.2021.014559

中图分类号：

学科分类号：

摘要：

In this paper, the local buckling of cylindrical long shells is discussed under axial pulse loads in a Hamiltonian system. Using this system, critical loads and modes of buckling of shells are reduced to symplectic eigenvalues and eigensolutions respectively. By the symplectic method, the solution of the local buckling of shells can be employed to the expansion series of symplectic eigensolutions in this system. As a result, relationships between critical buckling loads and other factors, such as length of pulse load, thickness of shells and circumferential orders, have been achieved. At the same time, symmetric and unsymmetric buckling modes have been discuss. Moreover, numerical results show that modes of post-buckling of shells can be Bamboo node-type, bending type, concave type and so on. Research in this paper provides analytical supports for ultimate load prediction and buckling failure assessment of cylindrical long shells under local axial pulse loads. © 2021 Tech Science Press. All rights reserved.

引用

页码：53 / 67

页数：14