中国舰船研究2018，Vol.13Issue(2)：123-128,6.DOI:10.3969/j.issn.1673-3185.2018.02.017
基于LS-DYNA的主蒸汽管道防甩设计影响因素分析
Influence factor analysis on anti-whip restraint of ship's main steam pipeline based on LS-DYNA
薛梅新 1杨鹏举 1赵翠娜1
作者信息
- 1. 中国舰船研究设计中心,湖北 武汉430064
- 折叠
摘要
Abstract
[Objectives]To address the high-energy pipe whip design problem faced by the nuclear power plants of ships,[Methods]LS-DYNA software is used to establish a nonlinear finite element model of the main steam pipe and U-shaped whip restraint device(i.e U-bolt)so as to simulate the dynamic whipping process.[Results]It is found that the whip restraint rejection force reaches its maximum peak at the primary collision and reduces towards the static support reaction after several collisions. Within a range of 40-120 mm,the maximum rejection force increases as the initial clearance between the pipe and U-bolt whip restraint device is increased,while the increasing slope gradually reduces and the dynamic magnification factor comes to a limit of 1.74.Within the range of 1.5D- 2.5D,the maximum rejection force decreases slightly by 2.5% as the relative axial location between the pipe and U-bolt whip restraint device is increased. Compared with the U-bolt whip restraint,the U-shaped plate can not only reduce the cross-sectional area by 16.3% but also lessen the maximum rejection force by 5.5%.[Conclusions]The analysis results show that the maximum rejection force of the U-shaped plate whip restraint device has a positive correlation with the initial clearance of the restraint,but there is a limit to the dynamic magnification factor,the square section U-shaped plate whip restraint device has greater bearing capacity.关键词
主蒸汽管道/防甩设计/LS-DYNA/U形板Key words
main steam pipe/pipe whip restraint design/LS-DYNA/U-shaped plate分类
交通工程引用本文复制引用
薛梅新,杨鹏举,赵翠娜..基于LS-DYNA的主蒸汽管道防甩设计影响因素分析[J].中国舰船研究,2018,13(2):123-128,6.
