含多孔层和不同材料层的复合隔墙板的隔声探究-土木工程专业论文.docxVIP

PAGE III PAGE III HYPERLINK dict://key.0895DFE8DB67F9409DB285590D870EDD/abstract Abstract Acoustic absorption of thin porous composites research has become a hotspot in cutting-edge research of environmental noise control, especially the development of thin thickness, good sound insulation performance of porous composite insulation material has become a new trend in noise reduction environment function material area. This development is significant to improve the high-rise building housing plot ratio and reduce the bearing. Under the theory of BIOT methodology and matrix transfer method, the article deduces a new table-type-hole matrix transfer model of the porous plate. According to the theoretical matrix formula of table-type-hole type perforated plate, the article uses MATLAB to explore the acoustic absorption coefficient of the porous plate and sound insulation effect of parameters. The results the article get from the simulation can provide references and proofs for the future design of acoustic absorption material. In the research the article firstly rearranged the table-type-hole perforated plate sound theoretical calculation formula of transfer matrix on the basis of cylindrical hole perforated plate matrix transfer theory. Through the table-type-hole perforated plate aperture, porosity, thickness and the change of the thickness of air layer, it got the rules of how parameters effect sound absorption and sound insulation, and determined the optimal choice of composite structure acoustic absorption formulation. Finally it analyzed the table-type-hole composite structure’s influence on acoustic absorption and came out following results: Spherical porous plate hole acoustic formula of transfer matrix theory is based on the acoustic transfer matrix of cylindrical hole perforated plate, on the basis of theoretical calculation formula with the help of calculus principle and the structure of the total transfer matrix which can be made in series in turn