东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (9): 1277-1286.DOI: 10.12068/j.issn.1005-3026.2024.09.008

• 机械工程 • 上一篇    

基于管-实体单元耦合的串联管路动力学建模及降应力优化

刘芳名, 孙伟()   

  1. 东北大学 机械工程与自动化学院,辽宁 沈阳 110819
  • 收稿日期:2023-05-07 出版日期:2024-09-15 发布日期:2024-12-16
  • 通讯作者: 孙伟
  • 作者简介:刘芳名(1997-),男,山东烟台人,东北大学硕士研究生
    孙 伟(1975-),男,辽宁营口人,东北大学教授,博士生导师.
  • 基金资助:
    国家科技重大专项项目(J2019-I-0008-0008)

Dynamic Modeling and Stress Reduction Optimization of Series Pipelines Based on Pipe-Solid Element Coupling

Fang-ming LIU, Wei SUN()   

  1. School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110819,China.
  • Received:2023-05-07 Online:2024-09-15 Published:2024-12-16
  • Contact: Wei SUN
  • About author:SUN Wei, E-mail: weisun@mail.neu.edu.cn

摘要:

针对空间串联管路迫切需要减振的问题,提出了一种基于管-实体单元耦合的空间串联管路有限元建模方法,并在此基础上执行了以降低应力响应为目标的卡箍布局优化.详细描述了建模理念,即卡箍及管接头等应力较大区域采用实体单元建模,其他区域采用管单元建模,最终将各部分耦合起来完成整体建模.创建了具体的优化模型,并给出了利用遗传算法进行优化的流程.以典型的串联管路为对象进行了实例研究,通过仿真与试验验证了所创模型的合理性.执行了降应力优化,获得了系统最优卡箍布局,优化后的系统基频最大共振应力相较于初始状态降低了27.05%.

关键词: 管-实体单元耦合, 串联管路, 动力学建模, 降应力, 优化

Abstract:

To handle the urgent need for vibration reduction of spatial series pipelines, a finite element modeling method for spatial series pipelines based on pipe?solid elements coupling was proposed, and on this basis, the clamp layout optimization with the goal of reducing stress response was performed. The modeling concept is described in detail, that is, the regions with high stress, such as clamps and pipe joints, are modeled by solid elements, the other regions are modeled by pipe elements, and finally the parts are coupled together to complete the overall modeling. A specific optimization model is created, and the process of optimization using the genetic algorithm is given. A typical series pipeline is taken as the object for a case study, and the rationality of the model is verified by simulation and experiment. Stress reduction optimization is performed, the optimal clamp layout of the system is obtained, and the maximum resonance stress of the optimized system fundamental frequency was reduced by 27.05% compared with the initial state.

Key words: pipe?solid element coupling, series pipeline, dynamic modeling, stress reduction, optimization

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