圆钢管相贯节点局部刚度的参数公式

对圆钢管相贯节点局部刚度研究的必要性和国内外研究状况作了评述 ;在钢管相贯节点局部变形机制的基础上对局部刚度作了定义 ;采用板壳有限元方法分析钢管相贯节点 ,通过单参数分析确定各影响参数与节点局部刚度之间的函数形式 ,从而设定回归模式 ,并用正交试验设计理论设计计算模型 ;应用多元线性回归理论拟合出相贯节点局部刚度的参数公式 ;通过节点模型试验对有限元方法进行校验 .结果表明 ,采用的分析方法及获得的参数公式具有很好的适用性

Parametric Formulas for Local Rigidity of Unstiffened Tubular Joints

The importance of the research on local rigidity of unstiffened tubular joints and the research achievements domestic and abroad are commented.Local rigidity of the joints is defined according to their local deformation mechanism.In this paper,the shell finite element method is adopted to investigate this kind of joints.Based on both single parameter analysis and orthogonal experimental design,and using multi variable linear regression analysis,a series of parametric formulas for computing local rigidity of unstiffened tubular joints are derived.Then some joints are tested to validate the finite element analysis.It is shown that the analytical method and parametric formulas developed in this paper have good applicability.