摘要
对焊接空心球节点,采用ANSYS9.0程序进行了承载力的模拟分析计算,获得了球节点受拉压时壳面弹塑性应力和变形分布规律,定出了破坏带区域在球壳中的确切位置.根据焊接空心球节点的受拉失效机理,提出了球节点塑性失效破坏的三维应力状态分析模型.进而研究了球体-焊缝-钢管一体复杂应力状态下的极限受力分析.应用极限状态计算理论得到焊接空心球节点抗拉承载力计算公式.基于空心球节点受压破坏机理的探讨和试验数据的统计分析,以若干变参数的线性回归方法,获得球节点受压承载力计算公式.数据结果表明,所得空心球节点承载力公式计算值与试验值拟合精度较好.
In this paper, the welded hollow sphere joint was analyzed by using of commercial code ANSYS 9.0. The elastoplastic stress and distortion distributions on sphere surface of the joint under tension and compression were obtained. The collapse zone position in the sphere shell was located. According to the collapse mechanism of the joint in tension, a new elastoplastic analysis model in the three - D state of stress was proposed. Further study on the static ultimate analysis of hollow sphere - welding seams - steel tube in their entirety was presented, and the bearing capacity formula of the hollow sphere in tension was derived using the limit state theory. Based on a discussion about the collapse mechanism of the hollow sphere under compression and on the statistical analysis of the experimental data , the bearing capacity formulas of the sphere joint were established with the linear regression method. The results show that the formulas agree well with the test.
出处
《郑州大学学报（工学版）》
CAS
2006年第3期25-29,共5页
Journal of Zhengzhou University（Engineering Science）
基金
河南省自然科学基金资助项目(954051500)
关键词
焊接空心球
有限元分析
承载力
破坏机理
welded hollow sphere
FEM analysis
bearing capacity
collapse mechanism
