散体材料内部振动能量衰减的细观模型  

A micromechanical model of vibration energy attenuation in granular structure

作　　者：蒋红英[1] 鲁进步[1] 慕青松[2] 

机构地区：[1]西京学院工程技术系,西安710123 [2]兰州大学土木工程与力学学院,兰州730000

出　　处：《中国科技论文》2013年第5期470-472,共3页China Sciencepaper

基　　金：国家自然科学基金资助项目(11072095);西京学院科研项目(JI20114)

摘　　要：基于水平振动荷载下砂石层的实验,对砂石层内部颗粒动力响应开展了细观研究。运用随机理论分析了沿深度方向能量快速耗散的变化规律,指出能量耗散的主要原因是散射和剪阻,推导出水平振动下颗粒动力响应的概率模型。结果表明,建立的模型与实验结果较为吻合,反应了在水平振动力的作用下,振动能量可通过散体材料内部的颗粒移动耗散的特点。Based on the experiment of the gravel layer at the level of horizontal vibration load, a microscopic study on dynamic response of granules in the gravel pile was carried out. The stochastic theory was used to analyze the rapid dissipation of energy along the depth direction. It is suggested that the main causes of the energy dissipation are scattering and shearing resistance. A probability model of dynamic response of granules under horizontal vibration is deduced. The model agrees well with the experimental results and reflects the characteristics of the vibration energy dissipation through the granular movement under horizontal vibration.

关 键 词：岩土工程 砂石堆实验 水平振动荷载 细观分析 耗散模型. 

分 类 号：TU411[建筑科学—岩土工程]