摘要
该文介绍了K型焊接管节点的几何和数值模拟方法。通过对两个大型的K节点模型的试验测试,得到了K节点在轴力作用下沿着焊缝周围的热应力区内的应力集中系数,并验证了数值结果的准确性。在此基础上,通过对1 008个不同几何形状的K节点在轴力作用下应力集中系数的分析,研究了几何参数对K节点应力集中系数的影响。根据模型分析的结果,通过曲线拟合提出了计算轴力作用下K节点应力集中系数的参数公式,并对该公式的精确性进行了评价。
The geometrical and numerical modelling of welded tubular K-joints is presented in this study. The stress concentration factors along the weld toe in the hot spot stress region for tubular K-joints sub- jected to balanced axial loads are obtained through experimental tests on two large-scale tubular K-joints. The accuracy of the numerical stress concentration factors is verified from experimental results.The effect of the geometrical parameters on the stress concentration factor of tubular K-joints under axial loads is in- vestigated based on the finite element results of 1 008 K-joints models with different geometries. Finally, a set of parametric equations to predict the stress concentration factor of a tubular K-joint subjected to balanced axial loads is proposed,and these parametric equations are deduced from nonlinear regression and curve fitting technique. The accuracy of the parametric equations is also evaluated.
出处
《船舶力学》
EI
北大核心
2010年第4期399-408,共10页
Journal of Ship Mechanics
关键词
K型管节点
应力集中系数
轴力
几何参数
参数公式
Tubular K-joints
stress concentration factor
axial loads
geometrical parameters
parametric equations
