摘要
针对基于应变的管线设计所使用的管线钢管进行变形能力评价,为基于应变设计地区用的钢管产品标准的指标制订提供技术基础。本文以精确建模的数值仿真计算作为钢管全尺寸弯曲变形试验的有效补充,对钢管进行了屈曲变形行为的研究;针对钢管产品试制中不同的材料性能进行了仿真计算,最终提出:两个与钢管临界屈曲应变相关的应力比指标Rt5.0/Rt1.0和Rt2.0/Rt1.0分别为1.04和1.08。该研究结果为基于应变设计地区使用的钢管标准的制订提供了技术支持。
The evaluation of line pipes applied in strain-based designed pipelines is the technical basis for the pipe specifications.Research on the buckling behavior of line pipe for strain-based design by means of numerical simulation as the supplementary of full scale bending test is presented.Different material properties related to local buckling strain are conducted in the simulation to achieve actual parameters.Finally,to approach the critical buckling strain 1.5%,the flow stress ratios R t2.0 /R t1.0 and R t5.0 /R t1.0 are set of 1.04 and 1.08 respectively.Conclusions obtained may support the draft of pipe specification for strain-based design pipelines.
出处
《应用力学学报》
CAS
CSCD
北大核心
2012年第6期758-762,780,共5页
Chinese Journal of Applied Mechanics
基金
国家科技支撑计划(2008BAB30B01)
关键词
基于应变设计
管线
高应变管线钢管
初始几何缺陷
数值仿真
strain-based design,pipeline,high strain line pipe,initial geometric imperfection,numerical simulation.
