There are many various types of performances choosing to use indoor venues in recent years, but most of the arenas' acoustics in the early design is based on events, speeches and orchestra[1][2][3]. Now, due to th...
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Sink mark degrades the surface quality of the thick-walled injection molded components. An effective method for quantifying sink marks, and predicting the occurrence of such defects as a function of the injection mold...
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The stuffing box with pedestal (SBP) is a major component in centrifugal pumps (CPs). It is responsible for the transfer of load generated in the CP to the baseplate of the pump and finally to the ground. SBPs are usu...
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Silencers have widespread applications. In industrial settings they are used at large-scale combustion, gas turbine, blower and compressor system junction points to control noise. The most common methods of noise elim...
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ISBN:
(纸本)9781510885455
Silencers have widespread applications. In industrial settings they are used at large-scale combustion, gas turbine, blower and compressor system junction points to control noise. The most common methods of noise elimination via silencer are varying of the size and cross-sectional area of the transmission pipe such that during sound wave transmission, non-uniform impedance is produced. Partial sound wave reflection is an echo source or consumes the energy of transmitted sound waves to achieve noise elimination. In this study, COMSOL Multiphysics, commercial finite element analysis and simulation software, was the main analytical tool. The aim of this study was to investigate the effects of variations in silencer structure on acoustic attenuation. Based on finite element method simulation, the optimal silencer geometry for noise cancellation was determined.
The growth of consumer electronic products is encouraged by innovations and has stimulated the persistent development of earphones for high-quality sound reproduction. Earbud earphone is located in the concha of the h...
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Filling-to-packing switchover (also called as V/P switchover) is critical for assuring injection molding quality. An improper filling-to-packing switchover setting may result in various defects of injection-molded par...
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Quality control is a crucial issue in the injection molding process with target of obtaining a high yield rate and reducing production cost. However, conventional injection molding acts like a black-box in which the f...
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This article develops a robust simulation procedure to predict the electromagnetic and acoustic properties of loudspeaker with commercial finite element software. The performance of loudspeaker is essentially difficul...
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Quantum tunneling phenomenon allows a high-barrier reaction to occur even though thermal energy is not sufficient to surmount the barrier. The phenomenon has been suggested to exist in the isomerization of methylhydro...
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Injection molding is one of the most common methods for the mass production of plastic products with complex geometries. However, while injection molding is a highly convenient and cost-effective method, some problems...
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