Vibro Acoustic Sources In Lightweight Buildings

Author : Andreas Mayr
Publisher : Logos Verlag Berlin GmbH
Page : 321 pages
File Size : 50,9 Mb
Release : 2010
Category : Architecture
ISBN : 9783832526986

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Vibro-Acoustic Sources in Lightweight Buildings by Andreas Mayr Pdf

The work reported in this thesis addresses the problem of structure-borne sound transmission in buildings. Vibrating sources, such as services plant and domestic appliances, transmit vibro-acoustic power, causing noise complaints by occupants in rooms removed from the source room. There is not yet an accepted practical method of predicting the installed power into floors or supporting walls, and thence the resultant sound pressure in rooms. This study concentrates on the prediction of the installed power from mechanical installations in lightweight buildings composed of framed and ribbed plates. To identify the characteristics of such receiver elements, a field survey has been undertaken, which involved measurement of the point and transfer mobilities of common wall and floor structures. It is shown that the range of measured values of receiver point mobility is surprisingly small and that the constructions investigated often displayed thin plate-like characteristics, with relatively small spatial variations in point mobility. These field measurements give support to the notion of averaging over contacts. This single equivalent receiver mobility has been assembled both from measured data and from the approximate method and then used in combination with single equivalent source data, to yield an approximate prediction of the installed power. The agreement obtained between the exact and approximate values allowed consideration of a practical implementation of the approximate prediction method, based on a reception plate method which yields the activity and mobility of the tested machine as single equivalent values.

Author : Osama A B Hassan
Publisher : World Scientific Publishing Company
Page : 972 pages
File Size : 51,6 Mb
Release : 2009-06-24
Category : Architecture
ISBN : 9789813107410

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Building Acoustics and Vibration by Osama A B Hassan Pdf

As a comprehensive reference dedicated to sound and vibration in buildings, Building Acoustics and Vibration addresses the basic and advanced principles that can be used to solve practical and theoretical problems typically encountered in building and architectural acoustic practices. In addition, physical and mathematical concepts are introduced and developed sufficiently to make this publication a self-contained and up-to-date source of information for readers. Building Acoustics and Vibration is a must-have textbook for engineering students, engineers, and consultants involved in the sound, vibrations and building environment. With comprehensibility and versatility in the presentation of knowledge, this highly anticipated publication will easily fill the gap in the literature of building engineering and sciences, which presently lacks an authoritative guide on the theoretical and practical aspects of building acoustics and vibration.

Author : Matthias Lievens
Publisher : Logos Verlag Berlin GmbH
Page : 114 pages
File Size : 44,7 Mb
Release : 2013
Category : Architecture
ISBN : 9783832534646

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Structure-borne Sound Sources in Buildings by Matthias Lievens Pdf

Structure-borne sound sources are vibrational sources connected in some way to the building structure. The mechanical excitation of the building structure leads to sound radiation. This is an important source of annoyance in modern light-weight buildings. The prediction of the sound pressure level from structure-borne sound sources is highly complicated because of the complexity involved in the coupling between source and receiver structure. The current standard on characterisation of service equipment in buildings EN 12354-5, can deal with sources on heavy structures (high-mobility source) but to date, there is no engineering method available for the case of coupling between source and receiver. A case study of a washing machine on a wooden joist floor is investigated in this thesis. In the first part, measurements in the coupled state are conducted. It is shown that the normal components are sufficient to predict the sound pressure level. However, this only applies to the coupled state. In the second part, a true prediction is calculated from independently measured source and receiver quantities. The difference between predicted and directly measured sound pressure level leads to considerable errors of up to 20 dB at low frequencies. This shows that the normal components are not sufficient to predict the coupling between a washing machine and a wooden floor.

Author : Tianjian Lu,Fengxian Xin
Publisher : Springer
Page : 350 pages
File Size : 55,9 Mb
Release : 2014-07-08
Category : Science
ISBN : 9783642553585

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Vibro-Acoustics of Lightweight Sandwich Structures by Tianjian Lu,Fengxian Xin Pdf

Vibro-Acoustics of Lightweight Sandwich Structures introduces the study of the coupled vibration and acoustic behavior of lightweight sandwich structures in response to harmonic force and sound pressure. This book focuses on the theoretical modeling and experimental investigation of lightweight sandwich structures in order to provide a predictive framework for vibro-acoustic characteristics of typical engineering structures. Furthermore, by developing solution tools, it concentrates on the influence of key systematic parameters leading to effective guidance for optimal structure design toward lightweight, high-stiffness and superior sound insulation capability. This book is intended for researchers, scientists, engineers and graduate students in mechanical engineering especially in structural mechanics, mechanics and acoustics. Fengxian Xin and Tianjian Lu both work at the School of Aerospace, Xi’an Jiaotong University.

Author : Anders Nilsson,Bilong Liu
Publisher : Springer
Page : 452 pages
File Size : 50,5 Mb
Release : 2015-09-15
Category : Science
ISBN : 9783662479346

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Vibro-Acoustics, Volume 2 by Anders Nilsson,Bilong Liu Pdf

Author : Fengxian Xin,Tianjian Lu
Publisher : Unknown
Page : 300 pages
File Size : 54,5 Mb
Release : 2014
Category : Electronic
ISBN : 7030413229

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Vibro-Acoustics of Lightweight Sandwich Structures by Fengxian Xin,Tianjian Lu Pdf

Author : Alphose Zingoni
Publisher : CRC Press
Page : 4438 pages
File Size : 50,9 Mb
Release : 2022-09-02
Category : Technology & Engineering
ISBN : 9781000824360

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Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems by Alphose Zingoni Pdf

Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems comprises 330 papers that were presented at the Eighth International Conference on Structural Engineering, Mechanics and Computation (SEMC 2022, Cape Town, South Africa, 5-7 September 2022). The topics featured may be clustered into six broad categories that span the themes of mechanics, modelling and engineering design: (i) mechanics of materials (elasticity, plasticity, porous media, fracture, fatigue, damage, delamination, viscosity, creep, shrinkage, etc); (ii) mechanics of structures (dynamics, vibration, seismic response, soil-structure interaction, fluid-structure interaction, response to blast and impact, response to fire, structural stability, buckling, collapse behaviour); (iii) numerical modelling and experimental testing (numerical methods, simulation techniques, multi-scale modelling, computational modelling, laboratory testing, field testing, experimental measurements); (iv) design in traditional engineering materials (steel, concrete, steel-concrete composite, aluminium, masonry, timber); (v) innovative concepts, sustainable engineering and special structures (nanostructures, adaptive structures, smart structures, composite structures, glass structures, bio-inspired structures, shells, membranes, space structures, lightweight structures, etc); (vi) the engineering process and life-cycle considerations (conceptualisation, planning, analysis, design, optimization, construction, assembly, manufacture, maintenance, monitoring, assessment, repair, strengthening, retrofitting, decommissioning). Two versions of the papers are available: full papers of length 6 pages are included in the e-book, while short papers of length 2 pages, intended to be concise but self-contained summaries of the full papers, are in the printed book. This work will be of interest to civil, structural, mechanical, marine and aerospace engineers, as well as planners and architects.

Author : Tor Erik Vigran
Publisher : CRC Press
Page : 383 pages
File Size : 51,5 Mb
Release : 2014-04-21
Category : Technology & Engineering
ISBN : 9781482266016

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Building Acoustics by Tor Erik Vigran Pdf

Building or architectural acoustics is taken in this book to cover all aspects of sound and vibration in buildings. The book covers room acoustics but the main emphasis is on sound insulation and sound absorption and the basic aspects of noise and vibration problems connected to service equipment and external sources. Covering all aspects of sound and vibration in buildings, this book explores room acoustics, sound insulation, and noise and vibration problems connected to service equipment and external sources.

Author : Barry Gibbs
Publisher : Multi-Science Publishing Company
Page : 452 pages
File Size : 50,7 Mb
Release : 2009-01-01
Category : Acoustics
ISBN : 1907132104

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Collected Papers in Building Acoustics by Barry Gibbs Pdf

This book contains a collection of papers on the measurement, prediction and control of sound transmission. It is in five sections: sound transmission in buildings; measurement methods, sources of sound and vibration, vibration isolation, lightweight building structures. The range of topics included cannot be exhaustive, because of the book page limit, but the editors believe the papers reflect important interests and concerns of contributors and readers. The relationship between the subjective and objective assessment of noise and of building performance remains an important topic. The requirement for acceptable sound insulation in lightweight buildings is even more urgent, with increasing use of timber-frame and timber composites. More sophisticated methods are required for the specification and design of vibration isolation for control of noise and vibration from external sources (rail, underground) and also internal sources in modern mechanically serviced spaces. There is a requirement for estimates of the uncertainty of measurement and prediction of sound insulation. This book brings together, for the first time in one set of covers, twenty five papers on the subject, a convenient corpus of knowledge. The book will be of interest to practising civil and construction engineers, as well as to researchers working in the specific area of building acoustics and related disciplines. The editors are members of the Acoustics Research Unit at the University of Liverpool.

Author : Dhanesh N. Manik
Publisher : CRC Press
Page : 493 pages
File Size : 42,7 Mb
Release : 2017-04-07
Category : Technology & Engineering
ISBN : 9781466581012

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Vibro-Acoustics by Dhanesh N. Manik Pdf

The subject of vibro-acoustics is important for the design of machine elements and structures, to minimize sound generated by them. For better machine designing, it is necessary for machine designers (mechanical engineers) to have a thorough knowledge of vibro-acoustics. Furthermore, since the design cycles of machines have become shorter, designers will have to design quiet machines at the drawing-board stage rather than applying "band-aid" techniques after the machine has been built. Although there is common ground in the treatment of acoustics, the subject of vibration is not very fortunate. Those interested in low-frequency vibration are generally concerned with the modal approach of using natural frequencies and mode shapes, whereas those interested in vibro-acoustics in medium and high frequencies are generally concerned with the wave approach. Since both modal and wave approaches have their advantages, it is a good idea to study both together to get the best out of them. This is useful for a better understanding the physics of vibro-acoustics. Written for students and professionals interested in gaining knowledge, this book systematically integrates the relevant aspects of vibro-acoustics from various viewpoints.

Author : Colin Hansen,Scott Snyder,Xiaojun Qiu,Laura Brooks,Danielle Moreau
Publisher : CRC Press
Page : 1564 pages
File Size : 53,9 Mb
Release : 2012-11-02
Category : Technology & Engineering
ISBN : 9781482234008

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Active Control of Noise and Vibration by Colin Hansen,Scott Snyder,Xiaojun Qiu,Laura Brooks,Danielle Moreau Pdf

Since the publication of the first edition, considerable progress has been made in the development and application of active noise control (ANC) systems, particularly in the propeller aircraft and automotive industries. Treating the active control of both sound and vibration in a unified way, this second edition of Active Control of Noise and Vibra

Author : Anonim
Publisher : ScholarlyEditions
Page : 993 pages
File Size : 53,7 Mb
Release : 2013-05-01
Category : Technology & Engineering
ISBN : 9781490105741

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Issues in Acoustic and Ultrasound Technology: 2013 Edition by Anonim Pdf

Issues in Acoustic and Ultrasound Technology: 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Applied Acoustics. The editors have built Issues in Acoustic and Ultrasound Technology: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Applied Acoustics in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Acoustic and Ultrasound Technology: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Author : Harijono Djojodihardjo
Publisher : Springer Nature
Page : 1080 pages
File Size : 53,8 Mb
Release : 2023-09-03
Category : Technology & Engineering
ISBN : 9789811680786

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Introduction to Aeroelasticity by Harijono Djojodihardjo Pdf

This textbook is intended as a core text for courses on aeroelasticity or aero-elasto-mechanics for senior undergraduate/graduate programs in aerospace and mechanical engineering. The book focuses on the basic understanding of the concepts required in learning about aeroelasticity, from observation, reasoning, and understanding fundamental physical principles. Fundamental and simple mathematics will be introduced to describe the features of aeroelastic problems, and to devise simple concurrent physical and mathematical modeling. It will be accompanied by the introduction and understandings of the mechanisms that create the interactions that generate the aeroelastic phenomena considered. The students will also be led to the relation between observed phenomena, assumptions that may have to be adopted to arrive at physical and mathematical modelling, interpreting and verifying the results, and the accompanied limitations, uncertainties and inaccuracies. The students will also be introduced to combine engineering problem solving attitude and determination with simple mechanics problem-solving skills that coexist harmoniously with a useful mechanical intuition.

Author : Anonim
Publisher : ScholarlyEditions
Page : 212 pages
File Size : 54,9 Mb
Release : 2013-01-10
Category : Technology & Engineering
ISBN : 9781481646772

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Issues in Acoustic and Ultrasound Technology: 2012 Edition by Anonim Pdf

Issues in Acoustic and Ultrasound Technology: 2012 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Ultrasound Technology. The editors have built Issues in Acoustic and Ultrasound Technology: 2012 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Ultrasound Technology in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Acoustic and Ultrasound Technology: 2012 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Author : Malcolm J. Crocker,Jorge P. Arenas
Publisher : John Wiley & Sons
Page : 784 pages
File Size : 47,8 Mb
Release : 2021-01-11
Category : Technology & Engineering
ISBN : 9781118496428

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Engineering Acoustics by Malcolm J. Crocker,Jorge P. Arenas Pdf

ENGINEERING ACOUSTICS NOISE AND VIBRATION CONTROL A masterful introduction to the theory of acoustics along with methods for the control of noise and vibration In Engineering Acoustics: Noise and Vibration Control, two experts in the field review the fundamentals of acoustics, noise, and vibration. The authors show how this theoretical work can be applied to real-world problems such as the control of noise and vibration in aircraft, automobiles and trucks, machinery, and road and rail vehicles. Engineering Acoustics: Noise and Vibration Control covers a wide range of topics. The sixteen chapters include the following: Human hearing and individual and community response to noise and vibration Noise and vibration instrumentation and measurements Interior and exterior noise of aircraft as well as road and rail vehicles Methods for the control of noise and vibration in industrial equipment and machinery Use of theoretical models in absorptive and reactive muffler and silencer designs Practical applications of finite element, boundary element and statistical energy analysis Sound intensity theory, measurements, and applications Noise and vibration control in buildings How to design air-conditioning systems to minimize noise and vibration Readers, whether students, professional engineers, or community planners, will find numerous worked examples throughout the book, and useful references at the end of each chapter to support supplemental reading on specific topics. There is a detailed index and a glossary of terms in acoustics, noise, and vibration.