摘要
关于钢丝缠绕增强塑料复合管(PSP)外压失稳的试验和理论分别在"钢丝缠绕增强塑料复合管外压失稳试验研究"和"钢丝缠绕增强塑料复合管外压失稳理论分析"中进行了详细的研究。由于失稳分析属于非线性、大变形问题,而对含初始几何缺陷 PSP 的稳定性进行理论计算更为复杂,本文基于大型有限元软件 ANSYS,采用特征值法和非线性法对 PSP 在外压载荷作用下的力学响应进行数值模拟,分别得到复合管的临界失稳压力和失稳模态;基准模型经特征值法分析得到临界失稳压力为0.97 MPa,经非线性法分析得到临界失稳压力为0.83 MPa;分析了边界支持和初始缺陷对复合管外压稳定性的影响,得到临界失稳压力和波纹数随长径比的变化关系。
Because of the presence of initial geometric defects, the analysis of plastic-matrix steel composite pipe （PSP） buckling is complicated for nonlinear and large deformation was involved. In this paper, numerical simulations were carried out using FEA code ANSYS 10.0 to study the mechanical response of PSP under external pressure, based on the eigenvalue and nonlinear method. The critical buckling pressures and buckling mode shapes of PSP were obtained. The critical buckling pressures analyzed by eigenvalue and nonlinear method are 0.97 MPa and 0.83 MPa, respectively. By analyzing the influences of boundary conditions and initial imperfection on the stability of external pressure, the relations of the critical buckling pressure and ripple number versus the length-diameter ratio were obtained.
出处
《中国塑料》
CAS
CSCD
北大核心
2008年第4期53-56,共4页
China Plastics
基金
教育部新世纪优秀人才支持计划(NCET-04-0526)
教育部博士点专项科研基金(20050335065)
温州工业科技研究开发项目(G2004034)
关键词
钢丝缠绕增强塑料复合管
外压失稳
数值模拟
特征值法
非线性法
plastic-matrix steel composite pipe
external pressure buckling
numerical simulation
eigenvalue method
nonlinear method
