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Design and Simulation of Alpha Cabin and Assistant Software Developing of Pass-by Noise Standard Measurement

Author: ChengGong
Tutor: ZhangYuJun
School: Jilin University
Course: Acoustics
Keywords: Alpha cabin Indoor sound field Finite Element By noise testing regulations
CLC: TU112
Type: Master's thesis
Year: 2010
Downloads: 37
Quote: 0
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Abstract


Alpha (Alpha) cabin is a small reverberation chamber , is mainly used for the measurement of sound absorption characteristics of auto parts and other irregular specimen . And very expensive standard reverberation chamber , Alpha cabin cost significantly low number of Alpha cabin portability is better than a large reverberation chamber . The Alpha cabin can measure shape the irregular sample volume , which is especially important for car spare parts ( such as the car 's trim , engine noise enclosures , all kinds of absorbers , etc.) . It is these advantages Alpha-based tanks , automotive engineering industry , commonly Alpha cabin to test the sound absorption characteristics of the various parts of the car , such as sound absorption coefficient of the load , the acoustic impedance . Our through the fluctuations acoustic methods to deal with indoor sound field can inspire more mode wave sound place to have derived geometric conditions and sound source excitation conditions , the Alpha cabin geometry diffuser structure by finite element simulation and optimization . Car accelerates traveling vehicle is being gradually replaced by the noise test method B A method as the automotive industry testing standards . In this paper, the car accelerates traveling through the noise test methods A and B developed a guiding platform . Guiding the implementation of this platform can be complicated test method B , save time and manpower , so that the actual testing process can be more convenient , correct , and this platform friendly interface , easy to grasp and application . The large number of simulation experiments to verify the correctness of this platform .

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CLC: > Industrial Technology > Building Science > Building the basic sciences > Building physics > Architectural acoustics
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