Effects of Resilient Materials on Impact Sound Insulation of Floors
| Autor: | Kin-ChongHoi, 許健冲 |
|---|---|
| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 A numerical model was generated by using ABAQUS to analyze the mechanical and acoustic properties of floors with resilient materials. First, the effects of resilient materials and face panels on the maximum tensile stress of floors subjected to uniform or concentrated loads are studied numerically. Furthermore, the acoustic properties of floors with resilient materials is investigated numerically to give the sound pressure distribution in an interior space, later switched to 1/3 octave SPL frequency domain according to ISO 717-2 standard, and then to propose an optimum arrangement of resilient materials and face panels for floors when their structural and acoustic properties are of concern. Numerical results show that the arrangement of resilient materials and face panels are important to determine the mechanical and acoustic properties of floors. When loads are partially supported by resilient materials, the maximum tensile stress became greater if their span is larger. However, the tensile stress can be significantly reduced when loads are fully supported by resilient materials. Also, the impact sound insulation is enhanced if a compliant resilient material is used, leading to a sound level of 35dB compared to 8dB for a stiff resilient material. But, the effects of density and thickness of resilient materials are insignificant. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|