混凝土箱梁的结构噪声及其影响因素

张迅; 李小珍; 刘全民; 吴金峰; 李亚东

doi:10.3969/j.issn.0258-2724.2013.03.003

混凝土箱梁的结构噪声及其影响因素

doi: 10.3969/j.issn.0258-2724.2013.03.003

基金项目:

国家自然科学基金资助项目(51008250)

新世纪优秀人才支持计划资助项目(NCET-10-0701)

国家863计划资助项目(2011AA11A103)

高等学校博士点基金资助项目(20110184110020)

详细信息

通讯作者:
李小珍(1970-),男,教授,博士生导师,研究方向为车桥耦合振动,电话:13880808086,E-mail:xzhli@swjtu.cn

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出版历程
- 收稿日期: 2012-06-11
- 刊出日期: 2013-06-25

Structure-Borne Noise of Concrete Box-Girder and Its Influence Factors

摘要

摘要: 为探讨箱梁的结构噪声及其影响因素,以跨度32 m的混凝土简支箱梁为研究对象,采用混合有限元-边界元法进行数值仿真,并进行了现场试验验证.在此基础上,探讨了板厚和腹板倾角对箱梁结构噪声的影响规律.研究结果表明:混合有限元-边界元法适用于箱梁的结构噪声分析;箱梁振动和结构噪声的主要频率范围分别为40.0~125.0 Hz和31.5~100.0 Hz,底板附近在63.0 Hz出现噪声峰值;增大板厚能降低箱梁结构噪声,且增大顶板厚度最有效;当腹板倾角为0°~12°时,箱梁的结构噪声较小.
- 箱梁 /
- 结构噪声 /
- 振动 /
- 数值仿真 /
- 现场试验 /
- 影响因素
Abstract: In order to research on structure-borne noise of box-girder and its influence factors, a simply-supported concrete box-girder with a span of 32 m was selected as the case study, its structure-borne noise was simulated by means of hybrid FEM-BEM method, and the computed results were validated by field measurements. On this basis, the influence laws of plate thickness and dip angle of web on structure-borne noise were probed into. The research results show that the dominate frequency ranges of box-girder vibration and structure-borne noise are 40.0 to 125.0 Hz and 31.5 to 100.0 Hz, respectively, and the peak frequency of noise around the bottom plate is 63.0 Hz. The structure-borne noise decreases with the increase of plate thickness, and the addition of top plate thickness is the most effective noise-reduction measure. The preferable dip angle of web is 0? to 12? for lower structure-borne noise of box-girder.
- box-girder /
- structure-borne noise /
- vibration /
- numerical simulation /
- field measurement /
- influence factor

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参考文献(15)

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