Dissertation > Excellent graduate degree dissertation topics show

Performance Calculation and Analysis of Sound Transmission for Double Panel Structure

Author: XingDongLiang
Tutor: LiTianYun
School: Huazhong University of Science and Technology
Course: Design and manufacture of ships and marine structures
Keywords: Sound transmission performance Sound transmission coefficient The structure of the two-layer board Calculation software
CLC: TB533
Type: Master's thesis
Year: 2008
Downloads: 111
Quote: 0
Read: Download Dissertation

Abstract


Double plate structure has a wide range of applications in modern engineering . Such as in the fields of marine, aviation , and a lot of noise is transmitted through this structure , two - tier board structure is used to improve the acoustic wave propagation loss ; acoustic applications , there are many areas require a two-layer board structure has a good sound transmission properties. Therefore , the structure of the two-layer board has a very important significance in acoustic technology , its acoustically transparent performance analysis is also very necessary . Actual two-tier board through sound problems are often very complex , generated acoustic waves in the boundary surface reflection, transmission , acoustic wave propagation in the solid layer , which is not only similar to the liquid compression wave shear wave . This paper discusses the incident angle is small, and the thickness of the plate is much less than the length and width dimensions of the case , can be approximated to that still only in the board plane longitudinal wave without transverse wave , acoustic wave transmission problems can be approximated as a liquid layer sonic transmissivity problems. Sound transmission coefficient of the infinite -layer board structure equation is derived and calculated sound transmission coefficient of the two - tier board structure . Then were used to consider the plate bending wave empirical formula and derivation the four weeks constraints limited two-layer board structure sound transmission coefficient calculation formula of two - tier board structure , sound transmission coefficient . Through sound performance and three model structure to do a comparative analysis . By computational analysis , the following conclusions : analysis band , the greater the spacing of the two-layer board , thickness is smaller , the larger the wave incident angle (0 ° to vertical incidence ) , the greater the sound transmission coefficient of the two - tier board structure , the better the performance of the sound transmission ; around the constraints of a limited two-layer board structure to consider the impact on the surrounding constraints in three models , although the structure of the sound transmission performance will deteriorate , but it is also the closest to the actual structure of the model . Last three models with different parameters when the structure sound transmission coefficient calculated using Matlab programming visualization , simplify the performance of the double plate structure through sound practical engineering calculation process, to provide a basis for the rapid optimization of the structure of the transparent sound performance , easy practical engineering applications .

Related Dissertations

  1. The Research on Influence of Line Losses in the Distrebution Network with Small Rural Hydropowers,TM727.1
  2. Rock dug large cutter suction dredger cutter cutting force calculation and analysis,U674.31
  3. Study on Writing Safety Special Contruction Plans for High-formwork Project and the Development of Calculation Software,TU755.2
  4. Research on Traction System Engineering Application Problems of Maglev Train,U266.4
  5. The Reasonable Limit Research of Production Parameters of Pubei Oilfield Gathering System,TE866
  6. Research on Electromagnetic Environment of Transmission Lines,TM726
  7. Thermodynamic Calculation Software of Converter Waste Heat Boiler,TK229.929
  8. Development and Application of the Calculation Software for Very Fast Transient Overvoltage in Gas Insulated Substation,TM769
  9. Research on Calculating Model and Software for Insulating Riser of Large Steel Castings,TG260
  10. Electronic states of lead molybdate crystal point defects and their color center,O773
  11. Research oil and gas supply model and software implementation,F426.22
  12. Design of Dynamic Reactive Compensation for Wind Farms,TM614
  13. FEA of the 400T Truck Crane at the Design-stage,TH213.6
  14. The Methods Study of Hydraulic Calculation of Ship Network,U661
  15. Design and Parameter Matching on Hydraulic Driven Downhole Twin-screw Pump,TE933.3
  16. Discussion of Gravity Retaining Wall Calculation Method and Software Development,TU476.4
  17. Computer Aided Design of Biological Aerated Filter(BAF),X703
  18. Development and Application of the Calculated Software of Geochemical Processes of Magma,P595
  19. Based on ANSYS transformer internal fault calculation software research,TM407
  20. Study on the Analysis and Calculation of the Stress in the Stabilizing Pile,P642.22
  21. Occlusion Partition Design Software Research and Implementation,TP311.52

CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > The occurrence of vibration and noise
© 2012 www.DissertationTopic.Net  Mobile