二维均质弹性地基Duxseal材料主动隔振研究
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1.山东科技大学 山东省土木工程防灾减灾重点实验室;2.新加坡国立大学土木与环境工程系;3.同济大学 岩土及地下工程教育部重点实验室

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山东省自然科学(NO. ZR201702160391)


Two dimensional analysis of Duxseal material as active vibration in homogeneous elastic soil
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1.Shandong University of Science and Technology,Shandong Province Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Qingdao;2.Department of Civil and Environmental Engineering,National University of Singapore;3.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji University,Shanghai

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    摘要:

    交通、机器运行、爆炸、打桩及其他人类活动会产生地面振动,不可避免的引起环境振动污染。本文提出一种具有优异阻尼性能的新型隔振减振材料—Duxseal用于主动隔振以减少环境振动污染。基于二维半解析边界元法,编制计算程序,计算半空间均质弹性地基中Duxseal不同宽度、厚度及顶面距地表深度时地表水平位移振幅、竖向位移振幅和振幅衰减系数。分析了Duxseal参数变化对地表位移的影响,并与WIB主动隔振进行了对比分析。计算结果表明,在竖向激振作用下,采用Duxseal材料作为主动隔振屏障能够有效地降低地表位移振幅;与WIB主动隔振不同,Duxseal材料只有在合理的宽度、厚度和较大的埋深,才能达到理想的隔振效果;在一定范围内增加Duxseal材料的宽度、厚度或埋深,可有效提高Duxseal材料的隔振效果。此外,现场试验也证明了Duxseal的隔振效果。

    Abstract:

    The ground vibration generated by human activities such as traffic load, machine operation, explosion and engineering construction will inevitably lead to environmental vibration pollution. To solve the problem, a new vibration isolation material with excellent damping capacity, Duxseal, is put forward for active vibration isolation in this paper. Based on two dimensional semi-analytical boundary element method, the calculation program is compiled to calculate the ground horizontal displacement amplitude, vertical displacement amplitude and amplitude attenuation coefficient with different width, thickness and embedment depth of Duxseal in half-space homogeneous elastic foundation. In addition, the influence of Duxseal width, thickness and embedment depth on ground displacement is analyzed, and the vibration isolation between Duxseal and WIB is compared comprehensively. The results indicate that Duxseal is an effective material to reduce the ground displacement amplitude under vertical excitation condition as active vibration isolation barrier. Unlike WIB active vibration isolation, Duxseal material can achieve the ideal vibration isolation effect only with reasonable width, thickness and relatively bigger embedment depth. The increase of the width, thickness and embedment depth of Duxseal material within a certain range can increase effectiveness of isolation for ground vibration. In addition, the isolation effect of Duxseal material is also proved by field test.

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  • 收稿日期:2018-12-25
  • 最后修改日期:2019-04-16
  • 录用日期:2019-04-16
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