Modal Analysis of a Compressor Shell and Cavity for Emitted Noise Reduction
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چکیده
منابع مشابه
Numerical Prediction of the Radiated Noise of Hermetic Compressors Under the Simultaneous Presence of Different Noise Sources
The prediction of the acoustic radiation of the compressor shell is resulting from a numerical vibro-acoustic model, involving the description of the compressor pump structure, compressor gas cavity and compressor shell structure, through the use of the FEM and BEM techniques. The presence of refrigerant and lubricating oil in the compressor cavity were taken into account, as well as the presen...
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A number of compressor design modifications to reduce the noise which are based on the modal characteristics of the compressor shell are discussed and special problems are pointed out. Most design changes exhibit effects across broad frequency regions and while reducing the noise in some frequency bands can cause noise increases in other bands. Shell damping was found to be a generally consiste...
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Hermetic reciprocating compressor with elliptical shell radiates noise whose frequency spectrum has a peak level at about 200 Hz and about 300 Hz. The 200 Hz and 300 Hz noise is mainly radiated from the top and the side of the compressor shell, respectively. For clarifying the noise radiation mechanism, experimental and theoretical analyses were performed. A noise source simulation test was set...
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The complexity arising from the interactions between the pulsating flow, gas cavity and shell structure has been the major obstacle in realizing the prediction of the radiated sound level of heiiDetic compressors by a numerical simulation. In this work, a numerical procedure combining a computer simulation program of the compressor process and the Finite Element Method (FEM)/Boundary Element Me...
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