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Structure-borne sound transmission from vibratory equipment to coupling structures in buildings.

机译：从振动设备到建筑物中耦合结构的结构声传输。

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摘要

This thesis addresses the problems of vibration-isolated machines and the structure-borne sound transmission in coupling building structures.;It first presents a study of the comprehensive assessment of the stability as well as the power transmissibility on the use of inertia blocks for vibration-isolated systems. Based on the simulation and analysis, an insight into the selection of the inertia block for the comprehensive performance of a vibration-isolated system is provided.;Secondly, a theoretical research of the flexural and longitudinal wave motion in a semi-infinite coupling periodic dual-layered beam structure is presented. A new transfer matrix method is derived for the fully coupled flexural and longitudinal waves. It is found that three symmetric and three antisymmetric types of characteristic coupled wave motion in a periodic structure, and their contribution on energy transmission is further investigated.;Moreover, the experimental research for the flexural-longitudinal motions in a finite coupling dual-layered beam structure is conducted to validate the developed method, and the results of measurement agree well with the numerical results. A simulation of vibration control design implies that the cross-layer transmitted vibration can be decreased by the attached cantilevers with mass.;Fourthly, the power flow transmission through a finite coupling dual-layered beam structure with a boundary condition is studied. The model considering the mono-coupling of flexural wave only is compared with the model considering the multi-coupling of flexural and longitudinal waves.;Finally, the coupling effect on the vibration control of two coherent vibratory machines placed on a dual-layered floor plate is analyzed. The total power of structure-borne sound transmitted from two coherent sources to a coupling floor structure is found to be different from that transmitted from the independent sources without coupling, especially at some strong coupling modes. It is suggested that the power transmissibility method should consider the interactions of the mounting points of coherent machine sources on a coupling floor structure as well as the effective floor mobility for independent machine sources.;The whole study promotes the fundamental understanding and prediction method of structure-borne sound transmission and control for vibratory machines on coupling multi-layered structures.
机译：本论文解决了在耦合建筑结构中隔振机器和固体声传递的问题。；首先提出了对使用惯性块进行振动的稳定性和动力传递性的综合评估的研究-孤立的系统。在仿真和分析的基础上，对隔振系统综合性能的惯性块的选择提供了见识。其次，半无限耦合周期对偶中的弯曲波和纵向波运动的理论研究。提出了多层梁结构。对于完全耦合的弯曲波和纵向波，推导了一种新的传递矩阵方法。进一步研究了周期性结构中三种对称和三种非对称特征波的耦合运动及其对能量传输的贡献。此外，在有限耦合双层梁中纵向-纵向运动的实验研究对结构进行了验证以验证所开发的方法，测量结果与数值结果吻合良好。振动控制设计的仿真表明，通过附加悬臂，可以减小跨层传递的振动。第四，研究了具有边界条件的有限耦合双层梁结构的动力传递。将仅考虑弯曲波单耦合的模型与考虑弯曲波与纵向波的多重耦合的模型进行比较。最后，耦合对双层地板上两个相干振动机的振动控制的耦合作用被分析。发现从两个相干源传输到耦合地板结构的固体声的总功率不同于从没有耦合的独立源传输的功率，特别是在某些强耦合模式下。建议功率传递法应考虑耦合机器结构上相干机器源安装点的相互作用以及独立机器源的有效底板移动性。整个研究促进了对结构的基本理解和预测方法耦合的多层结构上的振动机器的声传播和控制。

著录项

  • 作者

    Yi, Yun.;

  • 作者单位

    Hong Kong Polytechnic University (Hong Kong).;

  • 授予单位 Hong Kong Polytechnic University (Hong Kong).;
  • 学科 Engineering Architectural.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 130 p.
  • 总页数 130
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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