董祥祥 1高红波 2王树昌 1林磊 2徐德城 2周帅2
作者信息
- 1. 阳江核电有限公司,广东 阳江 529500
- 2. 苏州热工研究院有限公司,江苏 苏州 215004
- 折叠
摘要
Abstract
Vibration-induced fatigue failure in pipelines,which serve as critical fundamental components for fluid transport in heavy machinery and major technical equipment,presents a significant hazard to operational safety and stability.To enable accurate and efficient vibration assessment,existing criteria(such as the ASME OM3 standard)utilize a stress-velocity relationship.However,the higher-order modal correction factor(C5)within this relationship is difficult to obtain directly in engineering design and inspection,leading to a reliance on empirical values that lack conservative justification.To address this issue,this study performs a systematic modal analysis of single-span straight pipes based on the classic Euler-Bernoulli beam theory for structural vibration,combined with the traveling wave method.By conducting over fifty thousand parametric calculations covering variations in pipe length,diameter,wall thickness,and boundary constraints,the behavior of the C5 factor was investigated in depth.The results demonstrate that under the vast majority of working conditions,the C5value is highly concentrated around 1.0 and does not exceed a maximum of 1.11.Based on this statistical distribution,this paper proposes the unified adoption of a conservative value of C5=1.11 for the design and vibration assessment of pipelines in heavy equipment.This research provides a theoretical basis and data support for the vibration assessment and design optimization of pipeline components in major technical equipment,holding significant engineering value for enhancing equipment safety and reliability.关键词
管道振动/应力-速度关系/ASME OM3/修正因子Key words
vibration/stress-velocity relationship/ASME OM3/correction factor分类
机械制造
