BS ISO 13332-2001 Reciprocating internal combustion engines - Test code for the measurement of structure-borne noise emitted from high-speed and medium-speed reciprocating internal往.pdf

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1、BRITISH STANDARD BS ISO 13332:2000 Reciprocating internal combustion engines Test code for the measurement of structure-borne noise emitted from high- speed and medium- speed reciprocating internal combustion engines measured at the engine feet ICS 17.140.20: 27.020 NO COPYING WITHOUT BSI PERMISSION

2、 EXCEPT AS PERMITTED BY COPYRIGHT LAWBS ISO 13332:2000 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Committee and comes into effect on 15 April 2001 BSI 04-2001 ISBN 0 580 29429 3 National foreword

3、 This British Standard reproduces verbatim ISO 13332:2000 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MCE/14, RIC engines, which has the responsibility to: A list of organizations represented on this committee can be obt

4、ained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find”

5、facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal ob

6、ligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summar

7、y of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 13 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date C

8、ommentsReference number ISO 13332:2000(E) INTERNATIONAL STANDARD ISO 13332 First edition 2000-11-15 Reciprocating internal combustion engines Test code for the measurement of structure-borne noise emitted from high-speed and medium-speed reciprocating internal combustion engines measured at the engi

9、ne feet Moteurs alternatifs combustion interne Code dessai pour le mesurage du bruit solidien mis par les moteurs alternatifs combustion interne vitesse leve et moyenne, mesur aux pieds du moteurISO13332:2000(E) ii ISO 13332:2000(E)iii Contents Page Foreword.iv Introduction.v 1 Scope 1 2 Normative r

10、eferences 1 3 Terms and definitions .2 4 Symbols 2 5 Technical background.3 6 Test conditions 3 7 Frequency range4 8 Principle of measurement.5 9 Mount selection7 10 Measurement positions.7 11 Measurement and assessment.10 Annex A (informative) Engines Structure-borne noise characterization Test rep

11、ort form 11ISO 13332:2000(E) iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body inter

12、ested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical

13、 Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publicatio

14、n as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such

15、 patent rights. International Standard ISO 13332 was prepared by Technical Committee ISO/TC 70, Internal combustion engines. Annex A of this International Standard is for information only.ISO 13332:2000(E)v Introduction Noise in buildings, structures, ships, aircraft and land vehicles often arises f

16、rom the use of internal combustion engines, particularly reciprocating engines, and there may be situations where these are the dominant noise source. Even where it is not dominant, it may form an unwelcome background noise. These noises, arising within the building, etc., can be transmitted in at l

17、east two ways as given below. a) Directly into the surrounding air. This is called airborne sound and ISO 6798 specifies methods for determining the airborne noise output of internal combustion engines. b) Through excitation or vibration in the supporting structure, pipes and shafts. These vibration

18、s then pass through the structure as structural vibration, exciting in turn the walls and panels of the structure, resulting in the radiation of so-called secondary sound or structure-borne noise. The ability of the source of vibration (the engine) to generate vibration in the structure in which it

19、is mounted depends on the amount of motion of the engine at its mounting points, the properties of the engine mounting system and the mobility of the receiving structure. Vibration from the engine feet may be in the vertical sense, which is the one most easily visualised, but may also be longitudina

20、l or transverse with respect to the crankshaft axis. The vibration source may also cause rotational input, resolved about each of the three orthogonal axes. The passage through the structure of any vibration which has been caused in it can be very difficult to control, particularly at low frequencie

21、s. There are many possible modes of vibration of the structure which could be responsible for the transmission (compression, torsional or flexural modes). Only breaks in the continuity of the structure are likely to be completely effective, and this is not usually possible. Damping of the structure

22、may be effective for some propagation modes, particularly at high frequencies/short wavelengths, but will not be sufficiently effective at low frequencies. In spite of the difficulties in controlling the propagation of vibration within the structure, there are obvious benefits in knowing the charact

23、eristics of the engine as a potential vibration source so that a choice may be made amongst various competing mounting engines, or the structure and engine mounts can be designed to comply with the properties of the engine selected.INTERNATIONAL STANDARD ISO 13332:2000(E)1 Reciprocating internal com

24、bustion engines Test code for the measurement of structure-borne noise emitted from high-speed and medium-speed reciprocating internal combustion engines measured at the engine feet 1 Scope This International Standard defines the procedure for measuring the capacity of a high-speed or medium-speed e

25、ngine to generate vibration and the determination of the frequency limits of validity of the information quoted. The method described in this International Standard is not suitable for low-speed engines. This International Standard describes an engineering and not a precision method. Whether the tes

26、ts are carried out on the test bed or on site shall be agreed between the user and the manufacturer. This International Standard applies to high-speed and medium-speed reciprocating internal combustion engines for land, rail traction and marine use, excluding engines used to propel agricultural trac

27、tors, road vehicles and aircraft. This International Standard may be applied to engines used to propel road-construction and earth-moving machines, industrial trucks and for other applications where no suitable International Standard for these engines exists. 2 Normative references The following nor

28、mative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standar

29、d are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standa

30、rds. ISO 1503:1977, Geometrical orientation and direction of movements. ISO 2954:1975, Mechanical vibration of rotating and reciprocating machinery Requirements for instruments for measuring vibration severity. ISO 3046-1: 1) , Reciprocating internal combustion engines Performance Part 1: Declaratio

31、ns of power, fuel and lubricating oil consumptions, and test methods Additional requirements. ISO 3046-3:1989, Reciprocating internal combustion engines Performance Part 3: Test measurements. ISO 3046-7:1995, Reciprocating internal combustion engines Performance Part 7: Codes for engine power. ISO 9

32、611:1996, Acoustics Characterization of sources of structure-borne sound with respect to sound radiation from connected structures Measurement of velocity at the contact points of machinery when resiliently mounted. 1) To be published. (Revision of ISO 3046-1:1995)ISO 13332:2000(E) 2 3 Terms and def

33、initions For the purposes of this International Standard, the following terms and definition apply. 3.1 structure-borne noise vibration transmitted through solid structures in the frequency range of audible sound 3.2 contact area area of engine supports in contact with the surrounding structure, in

34、particular rubber mounts Figures 3 and 4 4 Symbols Symbols and units used in this International Standard are listed in Table1. Table 1 Symbols with their designations and units Symbol Designation Unit d thickness of the engine foot plate mm d y1 distance of the accelerometer from position 1 in the t

35、ransverse direction mm D x dimension of the isolator in longitudinal direction mm D y dimension of the isolator in transverse direction mm f 0 the highest rigid-body natural frequency of the engine on its mounts Hz f 1 lower frequency limit Hz f 2 upper frequency limit Hz L vxi velocity level in lon

36、gitudinal direction at position i dB L vyi velocity level in transverse direction at position i dB L vzi velocity level in vertical direction at position i dB vx L mean velocity level in longitudinal direction dB vy L mean velocity level in transverse direction dB vz L mean velocity level in vertica

37、l direction dB n number of engine mounts 1 z v arithmetic mean of velocities v 1z and v 2z m/s v 1z velocity at position 1z m/s v 2z velocity at position 2z m/s X longitudinal direction Y transverse direction Z vertical direction ISO 13332:2000(E)3 5 Technical background On the basis of information

38、currently available, the requirement of this International Standard is for translation measurements of mount vibration only 2) , in three orthogonal directions. This requirement is based partly on the results of recent calculations and early measurements which suggest that rotational input is a seco

39、ndary effect. The essence of the method is to determine the amount of vibration (in three orthogonal directions) which would occur at the mounting feet of an engine, where they have to be supported by a flexible mounting system which provides negligible restriction to their motion. The vibration mea

40、surements will be in the three orthogonal axes with respect to the engine defined in clause 4 of ISO 1503:1977. NOTE In addition, the knowledge of structure-borne noise levels of a reciprocating internal combustion engine enables comparison and calculation of the vibration input into a mounting syst

41、em, provided that the source (engine), mounting system and load (receiving structure) impedances are known. In practice, the vibration generated will be a function of frequency, and it will not be possible to provide a mounting system which will be suitable, or which will allow the engines vibration

42、 performance to be assessed, over the whole range of frequencies. 6 Test conditions 6.1 Mounting During the taking of measurements, the engine under investigation shall be supported on appropriate mounts, be provided with the required services (air, fuel, exhaust, coolant, lubricant, electrical supp

43、ly) and also be equipped with a load system to absorb the power developed. The provision of these services shall be by means of flexible connectors which do not significantly influence the vibration of the engine. The engine shall be tested with its standard flywheel, and with a sufficient bend and

44、torsional coupling to the load. The type and characteristics of the flexible coupling arrangement shall be declared in the test report. 6.2 Mounting conditions Mounting systems for diesel engines can vary widely, depending on weight, power and application. Whilst the supports for the engine feet are

45、 commonly resilient for high-speed and medium-speed engines, these mountings may not always be suitable for effective assessment of the structure-borne noise emission from the particular engine being measured. NOTE In order that the assessment be carried out to a frequency (f 1 ) as low as is necess

46、ary, the following characteristics of the mounting system should be observed if at all possible: 1) the resilient elements should be mounted on a massive, rigid foundation; 2) f 0 should be as low as practically possible. Practical limits can be set for f 0 however, both by the known characteristics

47、 of the human ear, and the fundamental properties of the engine firing cycle (2-/4-stroke cycle). 2) There may be, nevertheless, a requirement for rotational vibration input to be assessed in particular instances to be agreed between customer and manufacturer. This is recognized to be a particularly

48、 difficult measurement. Rotational measurements are not covered in this International Standard. Rotational-vibration measurement should be carried out in accordance with ISO 9611.ISO 13332:2000(E) 4 6.3 Engine operating conditions The operating conditions for measurement of structure-borne noise, ra

49、ted speed and 100 % load, in accordance with ISO 3046-1 and ISO 3046-7, shall be defined by the manufacturer. Other operating points may be agreed upon between the customer and the manufacturer. During the course of the measurements, the engine output shall not deviate more than 10 % from the declared or other agreed engine output. The engine shall run under steady-state conditions. The measurement of engine speed and power shall be in accordance with ISO 3046-1 and ISO 3046-3 and shall be documented in the test report. 7 Frequency