吉林大学学报(工学版) ›› 2021, Vol. 51 ›› Issue (4): 1222-1229.doi: 10.13229/j.cnki.jdxbgxb20200321

• 车辆工程·机械工程 • 上一篇    

随机振动环境下液压直管道设计方法

李卫1,2(),张怀亮1,2(),瞿维1,2   

  1. 1.中南大学 高性能复杂制造国家重点实验室，长沙 410083
    2.中南大学 机电工程学院，长沙 410083
  • 收稿日期:2020-04-19 出版日期:2021-07-01 发布日期:2021-07-14
  • 通讯作者: 张怀亮 E-mail:liwei16121@163.com;zhl2001@csu.edu.cn
  • 作者简介:李卫（1993-），男，博士研究生.研究方向：液压系统动力学.E-mail：liwei16121@163.com
  • 基金资助:
    国家重点基础研究发展计划项目(2013CB035400);湖南省自然科学基金项目(2020JJ4736);中南大学中央高校基本科研业务费专项资金项目(2021zzts0142)

Design method of hydraulic straight pipe under random vibration

Wei LI1,2(),Huai-liang ZHANG1,2(),Wei QU1,2   

  1. 1.State Key Laboratory of High Performance and Complex Manufacturing，Central South University，Changsha 410083，China
    2.College of Mechanical and Electrical Engineering，Central South University，Changsha 410083，China
  • Received:2020-04-19 Online:2021-07-01 Published:2021-07-14
  • Contact: Huai-liang ZHANG E-mail:liwei16121@163.com;zhl2001@csu.edu.cn

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摘要：

为了减小硬岩掘进机（TBM）工作过程中产生的随机振动对其液压系统中的液压直管道位移和应力的影响，建立了随机振动环境下液压直管道设计模型，并采用实验验证了模型的正确性。分析了管道结构参数对液压直管道应力响应和位移响应的影响规律，发现液压直管道应力响应和位移响应随管道内径和管道长度的变化趋势是相反的，而随着管道壁厚的增大，管道最大位移响应和最大应力响应均增大。采用基于遗传算法的多目标优化算法对随机振动环境下两端固支液压直管道的结构参数进行优化设计，对比分析了设计前后管道的应力响应和位移响应，结果表明，设计后的管道最大位移均方值降低了约16.21%，最大应力均方值降低了21.04%。研究结果可为随机振动环境中液压管道的抗振设计与选型提供理论依据。

关键词: 液压直管道, 流固耦合, 随机振动, 优化设计

Abstract:

For reducing the impact of random vibration generated by Tunnel Boring Machine (TBM) on the displacement and stress of hydraulic straight pipe in its hydraulic system, a design model of hydraulic straight pipe under random vibration environment was established, and the correctness of the model was verified by experiments. The influences of pipeline structural parameters on the stress response and displacement response of hydraulic straight pipeline were analyzed. It is found that the stress response and displacement response of hydraulic straight pipe change with pipe diameter and pipe length in the opposite direction. The multi-objective optimization algorithm based on genetic algorithm was adopted to optimize the structural parameters of the fixed-supported hydraulic straight pipeline at both ends under the random vibration environment. The stress response and displacement response of the pipeline before and after the design were compared and analyzed. The results show that the mean square value of the maximum displacement of the pipeline after the design was reduced by about 16.21% and the mean square value of the maximum stress was reduced by 21.04%. The research results could provide a theoretical basis for the design and selection of vibration resistance of hydraulic pipeline in random vibration environment.

Key words: hydraulic straight pipe, fluid-solid interaction, random vibration, optimization design

中图分类号: 

  • TH137.5

图1

随机振动下液压直管道物理模型"

表1

管道分析主要参数"

参数名称数值参数名称数值
管道内径d/m0.019泊松比μ0.3
管壁厚度δ/m0.003管道外径D/m0.025

流体平均流速v

/（m·s-1）

5流体平均压力p/Pa2×107
管道支撑间距L/m1

管道密度ρp

/（kg·m-3）

7850

管道弹性模量

E/Pa

2.01×1011

流体密度ρf

/（kg·m-3）3

890

图2

管道参数对管道最大位移响应的影响"

图3

管道参数对管道最大应力响应的影响"

图4

实验系统液压原理图"

图5

实验系统实物图"

图6

应力响应实验值与仿真值对比"

图7

最优解的变化"

图8

优化前、后管道响应对比"

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