Experimental and numerical approach for the behavior of granular medium within shear band

剪切带内颗粒介质行为的实验和数值方法

• 批准号: 10460107
• 负责人: MURAKAMI Akira
• 金额: $ 5.38万
• 依托单位: OKAYAMA UNIVERSITY (1999)Kyoto University (1998)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10460107/
• 关键词: Granular material; Trap-door; Shear band; Cellular automata; Localization; Image processing; Shear test; 数値解析; 有限要素法; セルラオートマトン

During this year, trap-door experiment using aluminum rods is performed and the video record is analysed through the image processing system to obtain the displacement profile and the change of voids of granular media. New local rule of CL-CA (Connected-Lattice Cellular Automata is developed to enable us to analyze the uplift problem of granular assemblage by revising the existing rule for gravitational flow. In the experiment, aluminum rods with the same radius and those with different radii are used to compare the different behavior of circular disks and these behavior is monitored by the high-speed video during 10 seconds.Numerical analysis based on newly developed local rule is verified through a good agreement within numerical and experimental results. A new notion to capture the distribution of the contact force between particles is also described.

在这一年中，进行了使用铝杆的活板门实验，并通过图像处理系统分析视频记录，以获得颗粒介质的位移分布和空隙的变化。通过对已有的重力流局部规则的修正，发展了CL-CA（连通格点元胞自动机）局部规则。在实验中，采用相同半径和不同半径的铝杆来比较圆盘的不同行为，并通过高速摄像机对圆盘的行为进行了10 s的监控，通过数值计算和实验结果的比较，验证了基于新发展的局域规则的数值分析的正确性。一个新的概念来捕捉粒子之间的接触力的分布也被描述。

项目成果

村上 章: "The rale of system noise in Kalman filtoring for the parameter identification of ground senlement" Inverse Problems in Engineering Mechanics. 1巻. 283-287 (1998)

Akira Murakami：“用于地面沉降参数识别的卡尔曼滤波中的系统噪声规律”《工程力学逆问题》卷 1. 283-287 (1998)。

川端浩司: "EFGM for saturated soil"U.S. National Symp. on Computational Mechanics. 1. 313-314 (1999)

Koji Kawabata：“饱和土的 EFGM”美国国家计算力学研讨会。1. 313-314 (1999)

川端浩司: "EGFMによる水〜土連成解析"応用力学論文集. 2. 295-302 (1999)

Koji Kawabata：“使用 EGFM 进行水土相互作用分析”《应用力学论文集》2. 295-302 (1999)。

村上 章: "粒状体のせん断過程における間隙の変化"応用力学論文集. 2. 413-417 (1999)

Akira Murakami：“颗粒材料剪切过程中间隙的变化”《应用力学杂志》2. 413-417 (1999)。

村上 章: "土木工学における逆問題入門"土木学会・丸善. 150 (2000)

Akira Murakami：“土木工程反问题导论”，日本土木工程师学会，Maruzen 150 (2000)。