冰区航行船舶蒸汽管路应力分析及柔性设计
韩 旭1,4，杨 铭2，张 浩1，李泽朝1,4，丁泊遥3，解忠良4*
（1．河北工业大学 机械工程学院，天津 300130；2．中国船舶及海洋工程设计研究院，上海 200011；3．中国通用技术控股有限责任公司，北京 100073；4．西北工业大学 工程力学系，西安 710072）
摘 要：[目的]针对冰区航行船舶蒸汽管路系统易出现振动、疲劳损伤、破裂进而造成管路失效的问题，在管线设计初期对整体结构的布局优化设计进行研究。[方法]根据建模计算得到的管路系统应力校核结果，通过增设自然补偿及优化支吊架布局，确保管道能够适应复杂的应力和变形环境，并合理调整约束以提高管路系统的刚度，进而获得更加安全合理的布置方案。[结果]方案整改后，二次应力由材料许用应力值的2.9倍减少到0.7倍，符合ASME B31.3工艺管道规范，同时1阶固有频率满足高于工程管道设计频率的限值要求。[结论]为保证管路系统在各种工况下的安全性和稳定性，平衡了管路系统的柔性和刚度，取得良好效果，为其他类型的管路系统优化设计提供参考。
关键词：蒸汽管路；应力分析；柔性设计；固有频率；管系刚度
中图分类号：U674.21 文献标志码：A
Stress Analysis and Flexible Design of Steam Pipeline
for Ships Sailing in Ice Area
HAN Xu1,4, YANG Ming2, ZHANG Hao1, LI Zezhao1,4, DING Boyao3, XIE Zhongliang4*
(1. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China; 2. Marine Design & Research Institute of China, Shanghai 200011, China; 3. China General Technology Holding Company Limited, Beijing 100073, China; 4. Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an 710072, China)
Abstract: [Purpose]In view of the problems of pipeline failure caused by vibration, fatigue damage and rupture of steam pipeline system of ships sailing in ice area, the layout optimization design of the whole structure was studied at the initial stage of pipeline design. [Method]According to the stress check results of pipeline system obtained by modeling calculation, by adding natural compensation and optimizing the layout of supports and hangers, the pipeline can adapt to the complex stress and deformation environment, and reasonable adjustment of constraints to improve the stiffness of pipeline system, so as to obtain a safer and more reasonable layout scheme. [Result]After the modification, the secondary stress was reduced from 2.9 times the allowable stress value of the material to 0.7 times, in accordance with the ASME B31.3 process piping code, and the first-order natural frequency met the limit requirements of the design frequency of the engineering piping. [Conclusion]In order to ensure the safety and stability of the pipeline system under various working conditions, the flexibility and stiffness of the pipeline system are balanced, and good results are obtained, which provides reference for other types of pipeline system optimization design.
Key words: steam line; stress analysis; flexible design; natural frequency; piping stiffness
Link: Stress Analysis and Flexible Design of Steam Pipeline for Ships Sailing in Ice Area.pdf