聚氨酯高聚物材料应用于被动隔振的试验研究与理论分析

项目名称： 聚氨酯高聚物材料应用于被动隔振的试验研究与理论分析

项目编号： No.51278467

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 徐平

作者单位： 郑州大学

项目金额： 78万元

中文摘要： 本项目定位于隔振这一当前比较热门的环境振动问题，将应用于软弱地基加固的高聚物桩和土质堤坝防渗的高聚物墙引入到被动隔振，拟采用现场试验、理论分析和数值模拟相结合的方式研究其隔振机理。建立频率可调高聚物吸振测试系统，按照正交试验制备不同厚度和密度的高聚物板，测定高聚物的吸振性能；选取远离振动干扰的空旷区域进行空沟、多排高聚物桩、多道高聚物墙和高聚物WIB结构的隔振试验，人工制造不同吨位的冲击荷载和不同频率的重交通荷载，测试屏障前后的加速度场，提出各类屏障隔振效果的评价指标；以黏弹性参数表征高聚物材料的吸振性能，并引入到波场的势函数展开式中，基于弹性波的传播和多重散射理论，以现场试验结果为基准，建立高聚物屏障被动隔振的计算公式；采用BEM和FEM进行高聚物屏障隔振的数值模拟，分析振动频率、土体阻尼、高聚物密度等因素对隔振效果的影响；最后，将高聚物屏障隔振的相关研究成果由弹性土体推广到饱和土体。

中文关键词： 聚氨酯高聚物；隔振；现场试验；理论分析；数值模拟

英文摘要： This project is positioning vibration isolation which is one of current hot environment vibration problems, the piles and walls made of polyurethane polymer materials are introduced to the passive vibration isolation, the polymer materials are succeeding in the weak foundation reinforcement and soil dam seepage, and experiment, theoretical analysis and numerical simulation are used to study the problem of vibration isolation. Frequency adjustable polymer and vibration test system are established, different thickness and density requirements of polymer plate are made by way of orthogonal test preparation, and polymer and vibration performance would be determined. Open fields far away from vibration are selected, empty ditch, multiple rows of polymer piles, multi-channel polymer walls and polymer structure of vibration isolation test WIB are made in the fields, different tonnage impact loads and different frequency of heavy traffic loads are manufactured, a barrier of the acceleration tests are set up before and after the barriers, and isolation effect evaluation index of all kinds of barriers would be put forward. The polymer and vibration performance are introduced as parameters to potential function expansion of wave fields, the test results are considered, and calculation formula of passive isolation mechanism

英文关键词： polyurethane polymer；vibration isolation；in-situ test；theoretical analysis；numerical simulation