ISO INTERNATIONAL STANDARD 18312-2 First edition 2012-01-15 Mechanical vibration and shock Measurement of vibration power flow from machines into connected support structures Part 2: Indirect method Vibrations et chocs mécaniques Mesurage du flux de puissance vibratoire transmis par des machines aux structures de support dont elles sont solidaires - Partie2:Méthode indirecte Reference number ISO 18312-2:2012(E) ISO @ISO2012 No reproduction or networking permitted without license from IHS Not for Resale ISO 18312-2:2012(E) COPYRiGHTPROTECTEDDOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2012 - All rights reserved or networking permited withoutlicense from IHS Not for Resale ISO 18312-2:2012(E) Contents Page Foreword ..iv 1 Scope 2 Normative references 3 Terms and definitions. 4 Fundamentals.. 4.1 General material for determination of emitted vibration power 4.2 Expression of vibration power in different forms.. 5 Measurement.. 8 5.1 Vibration transducers arrangement 8 5.2 Typicalsignalprocessingforevaluationofaccelerationcross-spectrum .11 5.3 Metrological specifications. 11 6 Test procedures.. .12 6.1 Choice of number of vibration isolators to measure from 12 6.2 Transducer placement and determination of maximum frequency .12 7 Measurement uncertainty .13 8 Data presentation and test report. .13 Annex A (informative) Construction of dynamic stiffness matrix of vibration isolators. .15 Annex B (informative) Examples of simple geometries and linear components of dynamic stiffness matrix for massless isolators. 16 Bibliography 18 ili license from IHS Not for Resale