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细观非均匀介质中的耦合波动传播

陆建华 袁良柱 谢雨珊 陈美多 王鹏飞 徐松林

爆炸与冲击1991年(第11卷)分类题目索引[J]. 爆炸与冲击, 1991, 11(4): 375-380. doi: 10.11883/1001-1455(1991)04-0375-6
引用本文: 陆建华, 袁良柱, 谢雨珊, 陈美多, 王鹏飞, 徐松林. 细观非均匀介质中的耦合波动传播[J]. 爆炸与冲击, 2024, 44(9): 091423. doi: 10.11883/bzycj-2023-0438
LU Jianhua, YUAN Liangzhu, XIE Yushan, CHEN Meiduo, WANG Pengfei, XU Songlin. Coupled wave propagation in meso-scale heterogeneous medium[J]. Explosion And Shock Waves, 2024, 44(9): 091423. doi: 10.11883/bzycj-2023-0438
Citation: LU Jianhua, YUAN Liangzhu, XIE Yushan, CHEN Meiduo, WANG Pengfei, XU Songlin. Coupled wave propagation in meso-scale heterogeneous medium[J]. Explosion And Shock Waves, 2024, 44(9): 091423. doi: 10.11883/bzycj-2023-0438

细观非均匀介质中的耦合波动传播

doi: 10.11883/bzycj-2023-0438
基金项目: 国家自然科学基金(11672286,11872361);高压物理与地震科技联合实验室开放基金(2019HPPES01);中国石油与中国科学院重大战略合作项目(2015A-4812);中央高校基本科研业务费专项资金 (WK2480000008)
详细信息
    作者简介:

    陆建华(1997- ),男,博士研究生,lujianhua@mail.ustc.edu.cn

    通讯作者:

    徐松林(1971- ),男,博士,研究员,博士生导师,slxu99@ustc.edu.cn

  • 中图分类号: O347

Coupled wave propagation in meso-scale heterogeneous medium

  • 摘要: 非均匀介质在自然界中十分常见,针对细观非均匀介质的波动力学行为和非均匀性描述的研究具有重要意义并充满挑战。建立了反映细观非均匀材料压剪耦合特性的一般压剪耦合本构关系,提出了描述材料非均匀性的耦合系数,并建立了广义波动方程。广义波动方程数值分析表明,耦合系数的正负、取值和组合与应力/应变张量共同影响耦合波动传播过程。作为算例,给出了一阶近似的压剪耦合参数确定的本构关系以及3个压剪耦合特征波速的表达式,并利用有限差分法得到了耦合压缩波和剪切波的传播过程。研究了4个非均匀性耦合系数对应力状态、耦合波速和波传播过程的影响。耦合压缩波速反映了剪切对压缩的耦合效应和体积压实效应2种机制的竞争,耦合剪切波速反映了压缩对剪切的耦合效应和介质持续畸变带来的剪切弱化效应2种机制的竞争。这些机制可通过压剪耦合参数的不同组合来实现。应用真三轴实验系统测量了花岗岩、由砂浆制成的模型材料、具有粗骨料的水泥砂浆制成的材料3种非均匀介质在不同压剪应力下的纵波波速。结果表明,体积压实效应普遍存在,而非均匀程度越高,材料伸缩的同时完成切向的畸变导致压缩波的速度显著降低,剪切对纵波波速的影响越占据主导。理论计算结果与实验结果整体趋势基本一致。本研究可为非均匀材料的波速和动态力学性能研究提供物理机制方面的解释。
  • 图  1  耦合参数对静水压力和等效剪应力的影响

    Figure  1.  Influence of coupling parameters on hydrostatic pressure and equivalent shear stress

    图  2  耦合参数对耦合压缩波速和耦合剪切波速的影响

    Figure  2.  Influence of coupling parameters on coupled compression wave velocity and coupled shear wave velocity

    图  3  耦合参数对压剪耦合波传播的影响

    Figure  3.  Influence of coupling parameters on the propagation of compressive-shear coupled waves

    图  4  真三轴实验设备的实物和示意图

    Figure  4.  Photo and schematic diagram of the true triaxial experimental equipment

    图  5  y+杆侧面和截面的示意图

    Figure  5.  Schematic diagrams of the side and section of the y+ bar

    图  6  真三轴测试系统中应变片的位置

    Figure  6.  Positions of strain gauges in the true triaxial testing system

    图  7  xyz轴上的围压分别为20、12和8 MPa时,子弹撞击水泥砂浆材料记录的波形

    Figure  7.  Waveforms recorded by the projectile impacting the cement mortar material at confining pressures of 20, 12, and 8 MPa on the x-axis, y-axis, and z-axis, respectively

    图  8  花岗岩试样在不同静水压力和等效剪应力下的纵波波速

    Figure  8.  Longitudinal wave velocities in granite under different hydrostatic pressures and equivalent shear stresses

    图  9  MMM试样在不同静水压力和等效剪应力下的纵波波速

    Figure  9.  Longitudinal wave velocities in MMM under different hydrostatic pressures and equivalent shear stresses

    图  10  MMMA试样在不同静水压力和等效剪应力下的纵波波速

    Figure  10.  Longitudinal wave velocities in MMMA under different hydrostatic pressures and equivalent shear stresses

    表  1  3个试样的参数

    Table  1.   Parameters for three specimens

    试样材料x方向长度/mmy方向长度/mmz方向长度/mm质量/g密度/(g·cm−3)杨氏模量/GPa泊松比
    花岗岩50.10±0.3450.14±0.3450.18±0.343212.6470.00.20
    MMM49.70±0.4850.02±0.3449.64±0.372632.1216.50.15
    MMMA50.12±0.3450.20±0.3450.20±0.342922.3145.00.25
    下载: 导出CSV

    表  2  试样的围压条件

    Table  2.   Confining pressure conditions of the specimen

    序号 试样材料 压应力/MPa 静水压力/MPa 等效剪应力/MPa
    x方向 y方向 z方向
    1 花岗岩 16 16 16 16.00 0
    2 5 16 5 8.67 6.35
    3 15 5 20 13.33 7.64
    4 20 5 20 15.00 8.66
    5 20 12 8 13.33 6.11
    6 MMM 5 5 5 5.00 0
    7 16 5 16 12.33 6.35
    8 5 16 5 8.67 6.35
    9 16 16 16 16.00 0
    10 MMMA 5 5 5 5.00 0
    11 16 16 16 16.00 0
    12 16 5 16 12.33 6.35
    13 5 16 5 8.67 6.35
    14 20 12 8 13.33 6.11
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-12-12
  • 修回日期:  2024-02-29
  • 网络出版日期:  2024-03-12
  • 刊出日期:  2024-09-20

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