simulation of the noise transmission through automotive door seals

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Annual Index Abstracts Of Sae Technical Papers 1999

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ISBN : 0768006988
Genre :
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Technical Literature Abstracts

Author : Society of Automotive Engineers
ISBN : UOM:39015047750644
Genre : Technical literature
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Aeroacoustic Measurements

Author : T. J. Mueller
ISBN : 3540417575
Genre : Science
File Size : 40. 31 MB
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During the past three decades, there has been a growing concern over the in crease in noise pollution that comes as a direct result of the increased volume of automobile traffic, high-speed trains, and larger aircraft. Additional sources of noise are commonly found in air handling equipment (such as fans and pro pellers) and a variety of machinery used in construction and manufacturing. A vast majority of these noise sources are the result of a given system's aero acoustic response, or sound generated by the interaction of a flow field with the given structure. While barriers are commonly used to shield communities from highway and train noise, and absorption materials are used to shield machinery noise, there is no way to shield communities near major airports from the noise gen erated by low-flying aircraft. Tens of millions of people worldwide are affected by this airport noise problem. In densely populated Europe, up to 15 % of the total population is strongly influenced by airport noise. Since the volume of air traffic will continue to grow, so too will the problem and the number of people involved. It is not surprising that many countries and communities have taken legal action to preserve the quality of life in these areas. As a result, the airlines, airports, manufacturers and governments are working together to set new standards for aircraft noise reduction. In order to establish realistic goals, the generation and propagation of acoustic sources must be better understood.

Aero And Vibroacoustics Of Automotive Turbochargers

Author : Hung Nguyen-Schäfer
ISBN : 9783642350702
Genre : Technology & Engineering
File Size : 20. 25 MB
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Aero and Vibroacoustics of Automotive Turbochargers is a topic involving aspects from the working fields of thermodynamics of turbomachinery, aerodynamics, rotordynamics, and noise propagation computation. In this broadly interdisciplinary subject, thermodynamics of turbomachinery is used to design the turbocharger and to determine its operating conditions. Aerodynamics is needed to study the compressor flow dynamics and flow instabilities of rotating stall and surge, which can produce growling and whining-type noises. Rotordynamics is necessary to study rotor unbalance and self-excited oil-whirl instabilities, which lead to whistling and constant tone-type noises in rotating floating oil-film type bearings. For the special case of turbochargers using ball bearings, some high-order harmonic and wear noises also manifest in the rotor operating range. Lastly, noise propagation computation, based on Lighthill’s analogy, is required to investigate airborne noises produced by turbochargers in passenger vehicles. The content of this book is intended for advanced undergraduates, graduates in mechanical engineering, research scientists and practicing engineers who want to better understand the interactions between these working fields and the resulting impact on the interesting topic of Aero and Vibroacoustics of Automotive Turbochargers.

Topics In Wind Noise

Author : John Richard Callister
ISBN : CORNELL:31924104641422
Genre : Transportation
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Automotive Buzz Squeak And Rattle

Author : Martin Trapp
ISBN : 9780750684965
Genre : Technology & Engineering
File Size : 50. 10 MB
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Buzz, squeak, and rattle (BSR) is the automotive industry term for the audible engineering challenges faced by all vehicle and component engineers. Minimizing BSR is of paramount importance when designing vehicle components and whole vehicle assemblies. This is the only book dedicated to the subject. It provides a self-contained reference to the background theory, testing, analysis, and elimination of BSR. Written for practicing engineers and industry researchers, the book has a strong focus on real-world applications making it an ideal handbook for those working in this important area. Chapters from leading experts from across the motor industry-with input from the design and research labs of Ford, Toyota, Daimler-Chrysler and GM-review the techniques available and provide readers with the appropriate physics, structural dynamics and materials science to address their own BSR issues. The only book available on automotive BSR (buzz, squeak and rattle)-the number one cause of complaint on new cars Comprehensive and authoritative, with contributions from leading figures in the field and companies such as Ford, Toyota and Daimler-Chrysler Enables readers to understand and utilize the complex tools used to assess, identify and rectify BSR in vehicle design and testing

Automotive Engineering

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ISBN : UCSD:31822022726517
Genre : Automobiles
File Size : 27. 41 MB
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