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基于粒子图像测速技术的滑坡-涌浪两相运动分析系统

陈小婷 黄波林 王健 张全 冯万里

陈小婷, 黄波林, 王健, 等, 2020. 基于粒子图像测速技术的滑坡-涌浪两相运动分析系统. 地质力学学报, 26 (4): 492-499. DOI: 10.12090/j.issn.1006-6616.2020.26.04.042
引用本文: 陈小婷, 黄波林, 王健, 等, 2020. 基于粒子图像测速技术的滑坡-涌浪两相运动分析系统. 地质力学学报, 26 (4): 492-499. DOI: 10.12090/j.issn.1006-6616.2020.26.04.042
CHEN Xiaoting, HUANG Bolin, WANG Jian, et al., 2020. Two-phase motion analysis system for landslide-induced impulse wave based on the particle image velocimetry. Journal of Geomechanics, 26 (4): 492-499. DOI: 10.12090/j.issn.1006-6616.2020.26.04.042
Citation: CHEN Xiaoting, HUANG Bolin, WANG Jian, et al., 2020. Two-phase motion analysis system for landslide-induced impulse wave based on the particle image velocimetry. Journal of Geomechanics, 26 (4): 492-499. DOI: 10.12090/j.issn.1006-6616.2020.26.04.042

基于粒子图像测速技术的滑坡-涌浪两相运动分析系统

doi: 10.12090/j.issn.1006-6616.2020.26.04.042
基金项目: 

国家重点研发计划项目 2018YFC1504806

三峡后续工作地质灾害防治项目 0001212019CC60001

详细信息
    作者简介:

    陈小婷(1979-), 女, 硕士, 高级工程师, 主要从事水库地质灾害及涌浪灾害方面的研究。E-mail:344582786@qq.com

  • 中图分类号: P642.22

Two-phase motion analysis system for landslide-induced impulse wave based on the particle image velocimetry

  • 摘要: 滑坡-涌浪灾害威胁沿河两岸居民生产生活安全和航道安全。当前尚缺乏同步提供流固两相运动矢量的相关物理试验分析系统,以深刻分析滑坡-涌浪产生机制。文章提出了基于流固两相识别的粒子图像测速(PIV)技术和试验实现方法。利用2560×1024像素的工业相机,该PIV技术可实现在3 m×1.5 m视窗下最小1.17 mm的空间分辨率和0.01 s内最小0.117 m/s的观测速度。同时,提出了与该系统方法有关的误差来源和克服相关问题的解决方法。利用相关硬件设施示范性构建了滑坡-涌浪两相运动观测平台,并编制了专门的解算软件。对三维柱体颗粒崩塌、二维柱体颗粒崩塌及其涌浪和水下崩塌-涌浪进行了展示性试验,取得了良好效果。该系统可以揭示广泛的岩土体及水体运动全过程,具有很好的应用前景;将为滑坡-涌浪及相关动力学领域研究提供强有力的研究工具。

     

  • 图  1  平面粒子图像测速的光学采集系统

    ijX、Y坐标系在照片中的映射坐标系,一般会根据XY坐标系重新建立一个图像的局部坐标系;X(x, t)是指x点随时间t的位置变化

    Figure  1.  Optical collecting system for planar particle image velocimeter

    图  2  滑坡涌浪试验装置平台示意图

    Figure  2.  Schematic diagram of experiment platform for landslide-induced impulse wave

    图  3  三维柱状颗粒体试验装置

    Hi—初始颗粒柱体高度;di—初始颗粒柱体厚度

    Figure  3.  3D granular pillar experiment device

    图  4  柱体崩塌瞬时图像及其瞬时速度场

    a、b和c、d分别是XY平面和XZ平面相邻瞬时图像;e、f分别是a、b和c、d图像解算速度场

    Figure  4.  Instantaneous images of the pillar collapse and the instantaneous velocity field

    图  5  二维柱状颗粒体试验装置侧向图

    Figure  5.  2D granular column test device

    图  6  不同时刻柱体崩塌颗粒瞬时运动场

    Figure  6.  Instantaneous motion field of the collapse of column at different times

    图  7  不同时刻柱体崩塌产生涌浪过程

    红色为颗粒运动速度,青色为水体运动速度

    Figure  7.  Formation process of impulse wave generated by the collapse of the column at different times

    图  8  红色为颗粒运动速度,青色为水体运动速度

    红色为颗粒运动速度,青色为水体运动速度

    Figure  8.  Motion vector map of impulse wave generated by the column collapse underwater at different times

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出版历程
  • 收稿日期:  2020-04-25
  • 修回日期:  2020-06-30
  • 刊出日期:  2020-08-28

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