摘要
通过对美国新奥尔良大学董平沙教授的基于结构应力的主S-N曲线法的介绍,提出了一种基于应力线性化的主S-N曲线法,并给出该方法的操作流程。就方形管节点,分别采用董平沙教授的主S-N曲线法、美国ASME规范中的主S-N曲线法以及文中所述基于应力线性化的主S-N曲线法,进行疲劳寿命评估和比较。通过与热点应力法计算结果进行对比,表明该方法简单易行,且与热点应力法的结果更为接近。
A master S-N curve method based on stress linearization and its operation process are presented through the introduction of the main S-N curve method based on the structural stress that was proposed by Professor Dong of University of New Orleans,USA.The fatigue life of a rectangular hollow section(RHS)joint is evaluated and compared by using the master S-N curve method of Professor Dong and ASME rules,as well as the master S-N curve method proposed in the current study.Compared with the hot spot stress method,the master S-N curve method based on stress linearization is simple and practicable with the results closer to the calculations of the hot spot stress method.
作者
沈秋彬
吴剑国
SHEN Qiu-bin;WU Jian-guo(College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China)
出处
《船舶》
2017年第6期1-7,共7页
Ship & Boat
关键词
疲劳寿命
主S-N
曲线法
结构应力
应力线性化
方形管节点
fatigue life
master S-N curve method
structural stress
stress linearization
rectangular hollow section(RHS) joint
