Rankine被动应力状态粮仓的Janssen行为

J4 ›› 2010, Vol. 45 ›› Issue (9): 101-104.

Rankine被动应力状态粮仓的Janssen行为

李湘群,蒋亦民,彭政,符力平,左静,郑鹤鹏,王璐珠

中南大学物理科学与技术学院, 湖南长沙 410083

收稿日期:2010-03-08 出版日期:2010-09-16 发布日期:2010-10-12
作者简介:李湘群(1975-),女,硕士研究生,研究方向颗粒物理.Email:coolaxiang2006@163.com
基金资助:
国家自然科学基金资助项目10904175)

Janssen behavior of silos with Rankine passive stresses

LI Xiang-qun, JIANG Yi-min, PENG Zheng, FU Li-ping, ZUO Jing, ZHENG He-peng, WANG Lu-zhu

School of Physical Science and Technology, Central South University, Changsha 410083, Hunan, China

Received:2010-03-08 Online:2010-09-16 Published:2010-10-12

摘要/Abstract

摘要：

本文针对两种不同尺寸的颗粒,研究了仓底压力的最小值随填充质量和粮仓直径的变化关系,所得结果能用Janssen公式很好拟合,但其中的径向与轴向应力比值约为2,远大于通常粮仓工程规范中的Jaky公式估算值0.4,说明仓底压力最小时粮仓的应力状态靠近Rankine被动态。研究结果表明尽管粮仓的应力状态不尽相同,但它们都能较好地遵守Janssen提出的假设。

关键词: 颗粒物质;应力;粮仓;Janssen 模型

Abstract:

The relationship of the minimum values of silo bottom pressures’ changing with the different quantities of filled grain mass and the silo diameters for two different grain sizes was studied. It was found that the data could be well fitted with the Janssen formula. However, the ratio between horizontal and vertical stresses was about 2, much bigger than the ratio 0.4 estimated with the Jaky formula in the Norm of silo engineering, which implied that the stresses of these minimum pressure silos were close to the Rankine passive state. The results showed that although the stress states of the silos was different, they obey well the assumptions given by Janssen.

Key words: granular matter; stress; silo; Janssen model

李湘群,蒋亦民,彭政,符力平,左静,郑鹤鹏,王璐珠. Rankine被动应力状态粮仓的Janssen行为[J]. J4, 2010, 45(9): 101-104.

LI Xiang-qun, JIANG Yi-min, PENG Zheng, FU Li-ping, ZUO Jing, ZHENG He-peng, WANG Lu-zhu. Janssen behavior of silos with Rankine passive stresses[J]. J4, 2010, 45(9): 101-104.

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