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仿粒突箱鲀的起重机箱梁风荷载减载设计方法

王玉璞 程文明 杜润 王书标 邓勇

王玉璞, 程文明, 杜润, 王书标, 邓勇. 仿粒突箱鲀的起重机箱梁风荷载减载设计方法[J]. 西南交通大学学报, 2020, 55(3): 664-671. doi: 10.3969/j.issn.0258-2724.20190085
引用本文: 王玉璞, 程文明, 杜润, 王书标, 邓勇. 仿粒突箱鲀的起重机箱梁风荷载减载设计方法[J]. 西南交通大学学报, 2020, 55(3): 664-671. doi: 10.3969/j.issn.0258-2724.20190085
WANG Yupu, CHENG Wenming, DU Run, WANG Shubiao, DENG Yong. Bionic Design Method for Crane Box Girder Wind Load Reduction Based on Ostracion-Cubicus[J]. Journal of Southwest Jiaotong University, 2020, 55(3): 664-671. doi: 10.3969/j.issn.0258-2724.20190085
Citation: WANG Yupu, CHENG Wenming, DU Run, WANG Shubiao, DENG Yong. Bionic Design Method for Crane Box Girder Wind Load Reduction Based on Ostracion-Cubicus[J]. Journal of Southwest Jiaotong University, 2020, 55(3): 664-671. doi: 10.3969/j.issn.0258-2724.20190085

仿粒突箱鲀的起重机箱梁风荷载减载设计方法

doi: 10.3969/j.issn.0258-2724.20190085
基金项目: 国家自然科学基金面上项目(51675450)
详细信息
    作者简介:

    王玉璞(1989—),男,博士研究生,研究方向为起重机结构风工程,E-mail:yupuwang@my.swjtu.edu.cn

    通讯作者:

    杜润(1980—),男,讲师,博士,研究方向为微流动及其控制,E-mail:rdu@swjtu.edu.cn

  • 中图分类号: TH213.5

Bionic Design Method for Crane Box Girder Wind Load Reduction Based on Ostracion-Cubicus

  • 摘要: 风荷载是起重机大车运行时的重要载荷,主梁作为起重机的主要挡风构件,针对主梁的减载设计可以有效地降低起重机运行能耗,本文以粒突箱鲀的结构为启发,探究起重机箱梁风荷载的仿生减载设计方法. 首先运用灰度转换、二值图像转换及边缘检测方法提取箱鲀鱼嘴特征廓线,获得以箱梁特征高度为设计变量的仿生设计模型,然后通过箱梁迎风面附着轻质材料的方式实现传统起重机箱梁的仿生设计,并运用计算流体力学软件(FLUENT)对仿生设计进行评估. 研究结果表明:以某40 t集装箱起重机箱梁为例,采用聚苯乙烯泡沫作为轻质贴附材料的仿生箱梁较传统箱梁结构风阻减小65.77%,而仿生贴附结构仅使箱梁增重2.28%;仿生箱梁的流线外型减轻了由迎风面处边界层分离带来的流场扰动,降低了结构的气动力脉动值,提高了起重机在风场中运行的平稳性.

     

  • 图 1  Canny算法流程

    Figure 1.  Flow chart of Canny algorithm

    图 2  粒突箱鲀廓线提取

    Figure 2.  Contour extraction of ostracion-cubicus

    图 3  起重机箱梁结构

    Figure 3.  Structure of crane box girder

    图 4  起重机箱梁仿生结构设计

    Figure 4.  Bionic structure design of crane box girder

    图 5  仿生贴附结构廓线提取

    Figure 5.  Contour extraction of bionic attachment structure

    图 6  数值模型设置

    Figure 6.  Numerical model setting

    图 7  结构的整体气动力系数

    Figure 7.  Integral aerodynamic coefficient of structures

    图 8  起重机箱梁流线图

    Figure 8.  Pathlines of crane box girder

    图 9  结构背风面压力系数

    Figure 9.  Pressure coefficients of girder leeward side

    图 10  涡量图

    Figure 10.  Vorticity diagram

    表  1  网格无关性验证

    Table  1.   Grids independence verification

    对象网格精度名称网格数量/个平均阻力系数升力系数均方根背压系数
    EXP.Norberg2.79~2.822.023
    LES.Sohankar2.65 1.1921.993
    传统箱梁G128 6322.6821.4302.169
    G247 1282.6991.4582.167
    G365 4242.7421.4552.215
    仿生箱梁G128 0401.2100.5351.146
    G248 1240.9350.3660.871
    G372 1440.9660.3530.913
    下载: 导出CSV

    表  2  箱梁风载荷

    Table  2.   Wind loads of crane box girder

    对象迎风面积/m2重量/kg风荷载/kN阻力系数均方根升力系数均方根扭矩系数均方根
    传统箱梁 80 27 361.00 13.24 2.694 1.458 1.399
    仿生箱梁 80 27 998.44 4.53 0.936 0.366 0.214
    减载比/% 2.28 −65.77 −65.26 −74.90 −84.70
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-03-05
  • 修回日期:  2019-10-08
  • 网络出版日期:  2020-03-04
  • 刊出日期:  2020-06-01

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