ASA-S2.61-1989-R2005.pdf
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1、ANSI S2.61-1989 (ASA 78-1 989) by ANSI on 24-May2005 Reaffirmed by ANSI on IO-Jl-2001 AMERICAN NATIONAL STANDARD Guide to the Mechanical Mounting of Accelerometers Accredited Standards Committee S2, Mechanical Shock and Vibration ABSTRACT This standard specifies methods for mounting contact accelero
2、meters and delineates the limitations of the recommended methods such as frequency range of interest, amplitude, and phase measurement accuracy. Characteristics of the mounting ar- rangements used by specific accelerometers which should be specified by the manu- facturer are established and guidance
3、 is provided to the user to optimize perfor- mance of a recommended mounting method. Copyright Acoustical Society of America Provided by IHS under license with ASA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:22:54 MDTNo reproduction or networking permitted with
4、out license from IHS -,-,- AMERICAN NATIONAL STANDARDS ON ACOUSTICS The Acoustical Society of America provides the Secretariat for Accredited Standards Committees 51 on Acoustics, S2 on Mechanical Shock and Vibration, S3 on Bio- acoustics, and 51 2 on Noise. These committees have wide representation
5、 from the technical community (manufacturers, consumers, and general-interest representa- tives). The standards are published by the Acoustical Society of America through the American Institute of Physics as American National Standards after approval by their respective standards committees and the
6、American National Standards Institute. These standards are developed and published as a public service to provide stan- dards useful to the public, industry, and consumers, and to Federal, State, and local governments. This standard was approved by the American National Standards Institute as ANSI S
7、2.61-1989 on 7 February 1989. An American National Standard implies a consensus of those substantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence o an American National Sta
8、ndard does not in any respect preclude anyone, whether he has approved the standard or not, from manufacturing, market- ing, purchasing, or using products, processes, or procedures not conforming to the standard. Ameri- can National Standards are subject to periodic review and users are cautioned to
9、 obtain the latest editions. Caution Notice: An American National Standard may be revised or withdrawn at any time. The proce- dures of the American National Standards Institute require that action be taken to reaffirm, revise, or withdraw thk standard no later than five years from the date of publi
10、cation. The American National Standards Institute, Inc. (ANSI) is the national coordinator of voluntary standards development and the clearing house in the U .S. for information on national and international standards. The Acoustical Society of America (ASA) is an organization of scientists and engi
11、neers formed in 1929 to increase and diffuse the knowledge of acoustics and to promote its practical applications. Published by the Acoustical Society of America through the American Institute of Physics Copyright 1989 by the Acoustical Society of America. No portion of this publication may be quote
12、d or reproduced in any form without permission of the Acoustical Society of America. Any request to reproduce this standard in whole or in part should be addressed to the Standards Secretariat, in care of the Acoustical Society of America, 335 East 45th Street, New York, New York 1001 7-3483 Copyrig
13、ht Acoustical Society of America Provided by IHS under license with ASA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:22:54 MDTNo reproduction or networking permitted without license from IHS -,-,- FOREWORD (This Foreword is not a part of American National Standa
14、rd Cuide to the Mechanical Mounting of Acceler- ometers, ANSI S2.61-1989 (ASA Catalog No. 78-1 989). This standard is the counterpart of I S 0 5348-1987 Mechanical Vibration and Shock-Mechanical Mounting of Accelerometers, developed by iSO/TC 108/SC3 Use and Calibration of Vibration and Shock Measur
15、ing Instruments, under the Inter- national Organization for Standardization (ISO). This standard was developed under the jurisdiction of Accredited Standards Commit- tee 52, Mechanical Shock and Vibration, using the American National Standards In- stitute (ANSI) Accredited Standards Committee Proced
16、ure. The Acoustical Society of America provides the Secretariat for Accredited Standards Committee S2, Mechani- cal Shock and Vibration. Accredited Standards Committee 52, Mechanical Shock and Vibration, under whose jurisdication this standard was developed, has the following scope: Standards, speci
17、fications, methods of measurement and test, and terminology, in the fields of me- chanical shock and vibration, hut excluding those aspects which pertain to biological safety, toler- ance, and comfort. At the time this standard was submitted to Accredited Standards Committee S2, Me- chanical Shock a
18、nd Vibration, for final approval, the membership was as follows: S. I. Hayek, Chairman M. R. Serbyn, Vice-chairman A. Brenig, Secretary Acoustical Society of America o S. I. Hayek, M. R. Serhyn N r ) Institute of Environmental Sciences o R. Brown, I. Ehmann Ak National Bureau of Standards o M. R. Se
19、rhyn, D. C Robinson (Alt) National Electrical Manufacturers Association o D. V. Wright, E. LaBrush (Alt) Naval Ship Research (b) the mounting shall not introduce significant distorting motions of its own (note: This can best be achieved using simple symmetrical mountings); and (c) the mass of the ac
20、celerometer and mounting shall be small in comparison with the structure under test (see IS0 2954). 4.2 Areas of Application The selection of a mounting method is strongly de- pendent on the requirements of the measurement (Le., frequency range of interest, phase accuracy, measure- ment, environment
21、, etc.). Screw or stud mounting and cementing methods are the preferred methods in that the mounted resonance frequency is high and associat- 1 0 1989 Acoustical Society of America Copyright Acoustical Society of America Provided by IHS under license with ASA Licensee=IHS Employees/1111111001, User=
22、Wing, Bernie Not for Resale, 04/18/2007 11:22:54 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 AMERICAN NATIONAL STANDARD ed damping is very low. As a result, these methods are best suited for modal analysis studies, vibration inten- sity measurements, and transfer func
23、tion measure- ments, where phase measurement accuracy is critical as well as the more traditional measurements such as low-frequency machinery monitoring. Use of a magnet to mount accelerometers shall be restricted to low-fre- quency measurements on high-mass structures where the mating surface is s
24、uitable. The use of double-sided adhesive tape or beeswax to mount accelerometers shall be avoided where phase accuracy is important or high-frequency data are to be acquired. 5 MOUNTING METHODS 5.1 General The mounting surface shall be examined for cleanli- ness and smoothness and, if necessary, ma
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