| 对边简支加筋三明治板隔声性能研究 |
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| 引用本文： | 沈承,辛锋先,金峰,卢天健.对边简支加筋三明治板隔声性能研究[J].西安交通大学学报,2011,45(7):22-29,117. |
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| 作者姓名： | 沈承 辛锋先 金峰 卢天健 |
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| 作者单位： | 西安交通大学航天航空学院,710049,西安;西安交通大学强度与振动教育部重点实验室,710049,西安 |
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| 基金项目： | 国家重点基础研究规划资助项目(2011CB610305); 高等学校学科创新引智计划资助项目(B06024); 国家自然科学基金资助项目(11072188); 陕西省“13115”科技创新工程资助项目(S2010ZDKG704); 教育部新世纪优秀人才支持计划资助项目(NCET-08-0429) |
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| 摘 要： | 针对加筋三明治板声学特性的研究主要集中于无限大结构、很少考虑边界条件影响的问题,结合脉冲函数的使用,提出了对边简支、层芯为平行筋板的三明治板的动态响应力学模型,利用模态函数法推导了结构的传声损失计算公式.将理论和模拟结果进行了对比,二者吻合较好,验证了模型的有效性.所提出的计算方法相对于有限元数值方法具有更高的计算效率,能在较宽的频段范围内给出精确的结果,且便于分析结构传声的物理机制和结构参数对传声性能的影响.研究结果表明:简支边界在隔声曲线上引入了结构的共振隔声波谷;加筋三明治板结构中同样存在明显的吻合共振效应;随着入射声波频率的提高,筋板惯性效应的影响越发明显.
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| 关 键 词： | 三明治板 平行筋板 隔声 |
Sound Insulation Behavior of Simply-Supported Sandwich Structure with Parallel Studs |
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| SHEN Cheng,XIN Fengxian,JIN Feng,LU TIan jian.Sound Insulation Behavior of Simply-Supported Sandwich Structure with Parallel Studs[J].Journal of Xi'an Jiaotong University,2011,45(7):22-29,117. |
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| Authors: | SHEN Cheng XIN Fengxian JIN Feng LU TIan jian |
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| Institution: | SHEN Cheng1,2,XIN Fengxian1,JIN Feng1,LU Tianjian1,2(1.School of Aerospace,Xi'an Jiaotong University,Xi'an 710049,China,2.MOE Key Laboratory for Strength and Vibration,China) |
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| Abstract: | Most studies about acoustic property of sandwich structures have been limited to infinite systems,where the effect of boundary condition was ignored.An analytical model is therefore developed in this paper to predict the dynamic response of simply supported sandwich structure with parallel studs,and the sound transmission loss(STL) characteristics of the structure are calculated by employing the method of modal functions.For validation,the present theoretical results are compared with finite element simulat... |
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| Keywords: | sandwich structure parallel stud sound insulation |
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