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1、BRITISH STANDARD BS EN 13087-2:2000 Incorporating Amendment No. 1 Protective helmets Test methods Part 2: Shock absorption The European Standard EN 13087-2:2000, with the incorporation of amendment A1:2001, has the status of a British Standard ICS 13.340.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT A
2、S PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:23:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 13087-2:2000 This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of
3、 the Standards Committee and comes into effect on 15 July 2000 BSI 22 March 2002 ISBN 0 580 34245 X National foreword This British Standard is the official English language version of EN 13087-2:2000, including amendment A1:2001. The UK participation in its preparation was entrusted to Technical Com
4、mittee PH/6, Head protection, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments
5、 and promulgate them in the UK. A list of organizations represented on this committee can be obtained 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 un
6、der the section entitled “International Standards Correspondence Index”, or by using the “Find” 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
7、application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed throughout this document indi
8、cates when the document was last issued. Amendments issued since publication Amd. No.DateComments 1359822 March 2002Addition of Annex ZA Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:23:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPSICHE NORM EN 130
9、87-2 March 2000 + A1 December 2001 ICS 13.340.20 English version Protective helmets Test methods Part 2: Shock absorption (includes amendment A1:2001) Casques de protection Mthodes dessai Partie 2: Absorption des chocs (inclut lamendement A1:2001) Schutzhelme Prfverfahren Teil 2: Stodmpfung (enthlt
10、nderung A1:2001) This European Standard was approved by CEN on 14 January 2000. Amendment A1:2001 was approved by CEN on October 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national s
11、tandard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any othe
12、r language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Gr
13、eece, Iceland, Ireland, Italy, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 2000 CEN All rights of exploi
14、tation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13087-2:2000 + A1:2001 E Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:23:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13087-2:2000 BSI 22 March 2002 2 Foreword This European Standard has bee
15、n prepared by Technical Committee CEN/TC 158, Head protection, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2000, and conflicting national sta
16、ndards shall be withdrawn at the latest by September 2000. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). According to the CEN/CENELEC Internal Regulatio
17、ns, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the Unite
18、d Kingdom. This European Standard is the second part of EN 13087, which supports essential requirements of EU Directive(s), and consists of ten parts as follows: Part 1: Conditions and conditioning; Part 2: Shock absorption; Part 3: Resistance to penetration; Part 4: Retention system effectiveness;
19、Part 5: Retention system strength; Part 6: Field of vision; Part 7: Flame resistance; Part 8: Electrical properties; Part 9: Mechanical rigidity; Part 10: Resistance to radiant heat. Foreword to amendment A1 This amendment EN 13087-2:2000/A1:2001 to EN 13087-2:2000 has been prepared by Technical Com
20、mittee CEN/TC 158, Heat protection, the Secretariat of which is held by BSI. This amendment to the European Standard EN 13087-2:2000 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2002, and conflicting national st
21、andards shall be withdrawn at the latest by June 2002. This amendment to the European Standard EN 13087-2:2000 has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship w
22、ith EU Directive(s), see informative Annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finl
23、and, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Terms and definitions3 4Prerequisites3 5Test methods4 5.1General4 5.2Falling mass
24、 method4 5.3 Falling headform method5 Annex A (normative) Test results Uncertainty of measurement7 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives7 Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:23:14 GMT+00:0
25、0 2006, Uncontrolled Copy, (c) BSI EN 13087-2:2000 BSI 22 March 2002 3 Introduction This standard is intended as a supplement to the specific product standards for protective helmets (helmet standards). This method or other test methods may be applicable to complete helmets or parts thereof, and may
26、 be referenced in the appropriate helmet standards. Performance requirements are given in the appropriate helmet standard, as are such prerequisites as the number of samples, preconditioning, preparation of samples for the tests, sequence and duration of testing and assessment of test results. If de
27、viations from the test method given in this standard are necessary, these deviations will be specified in the appropriate helmet standard. 1 Scope The European Standard describes methods of test for protective helmets. The purpose of these tests is to enable assessment of the performance of the helm
28、et as specified in the appropriate helmet standard. This European Standard specifies the method for determination of shock absorption. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited a
29、t the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition o
30、f the publication referred to applies (including amendments). EN 960:1994, Headforms for use in the testing of protective helmets. EN 13087-1, Protective helmets Test methods Part 1: Conditions and conditioning. ISO 6487, Road vehicles Measurement techniques in impact tests Instrumentation. 3 Terms
31、and definitions For the purposes of this European Standard, the terms and definitions used in this standard may be found in the appropriate helmet standard. 4 Prerequisites In order to implement this European Standard, at least the following parameters need to be specified in the appropriate helmet
32、standard: a) performance requirements; b) number of samples; c) preparation of samples; d) sequence of conditioning; e) sequence of tests; f) method of test 5.2 or 5.3; g) sizes of headforms; h) type of striker or anvil; i) fitting instructions; j) number and location of impact points on helmets; k)
33、 for each impact, the impact energy, including tolerance, of the falling mass for the falling mass method, or the impact speed, including tolerance, of the helmet/headform assembly for the falling headform method. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:23:14 GMT+00:00 2006, Uncont
34、rolled Copy, (c) BSI EN 13087-2:2000 4 BSI 22 March 2002 5 Test methods 5.1 General Testing shall be performed in the ambient conditions specified in EN 13087-1. When the test method specifies that the helmet shall be fitted to a headform, this shall be done in accordance with the appropriate helmet
35、 standard. Two tests methods are specified. The appropriate helmet standard will state which of these methods is applicable. Annex A refers to the uncertainty of measurement. 5.2 Falling mass method 5.2.1 Principle A specified striker is allowed to fall with specified energy on to a helmet which is
36、fitted to a rigidly mounted headform. The transmitted force is measured by means of a force transducer located beneath the headform. 5.2.2 Apparatus 5.2.2.1 Base The base shall be solid, made of steel or a combination of steel and concrete and have a mass of not less than 500 kg. At least the upperm
37、ost 25 mm shall consist of steel, which shall be firmly attached to the concrete if present. No part of the base and headform mounting assembly shall have a resonant frequency liable to affect the measurements. NOTE 1See 5.2.2.6.2 regarding frequency response. 5.2.2.2 Test headforms The headforms sh
38、all comply with EN 960:1994, 2.2, 4.1, 4.2, 4.3.1. The sizes to be used are specified in the helmet standard, but shall be selected from sizes A, E, J, M and O. When in the upright position, the headform shall be positioned so that its central vertical axis coincides with those of the force transduc
39、er and striker. 5.2.2.3 Striker Two types of striker are specified, a flat one and a hemispherical one. The type of striker to be used is specified in the appropriate helmet standard. The striker shall be made of steel and have a mass of (50 0,05) kg. The flat striker shall have a flat striking face
40、 of diameter (100 2) mm, with the edge of its circumference radiused to nominally 2 mm. The hemispherical striker shall have a hemispherical striking face of radius (50 1) mm. 5.2.2.4 Guidance system Means shall be provided for the striker to be dropped in free or guided fall. The guidance system sh
41、all be such as to ensure that the striker: shall be positioned above the headform so that its central axis coincides with the central vertical axis of the force transducer; and falls on to the required impact point with an impact speed of not less than 95 % of that which would theoretically obtain f
42、or a free fall. 5.2.2.5 Means to measure impact speed Unless free fall is employed, means shall be provided to measure the striker speed at a distance of not more than 60 mm prior to impact, to within an accuracy of 1 %. The impact speed shall be measured during the commissioning of the apparatus. I
43、t need not be done for each impact, but has to be sufficiently regular to comply with 5.2.2.4. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:23:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13087-2:2000 BSI 22 March 2002 5 5.2.2.6 Instrumentation to record and analyse the data 5.2.2.6
44、.1 Force transducer The non-inertial force transducer shall be firmly attached to the base and arranged so that its sensitive axis coincides with the vertical axis passing through the centre of gravity of the headform and the centre of the striker. The transducer shall be capable of withstanding a c
45、ompressive force of 40 kN without damage. 5.2.2.6.2 Signal conditioning instrumentation The instrumentation shall provide for the complete measuring channel to have a frequency response in accordance with channel frequency class (CFC) 600 of ISO 6487. If digital sampling is employed, a sample rate o
46、f at least 6 kHz shall be used. The required low pass filter may be included within the computer software. Means shall be provided to record the maximum force transmitted during impact, to the nearest 10 N. 5.2.3 Procedure Within 1 minute of its removal from conditioning (this time applies to temper
47、ature conditioning only), fit the helmet to the appropriate headform in the manner in which it is intended to be worn on the head and allow the striker to fall on to the specified impact point. The impact energy shall be specified in the appropriate helmet standard. If the design of the helmet permi
48、ts direct contact between the striker and the headform, the test shall not be performed and the result shall be declared a failure. 5.2.4 Test report Record and report the maximum force transmitted during the impact to the nearest 10 N. 5.3 Falling headform method 5.3.1 Principle The helmet to be te
49、sted is fitted to a headform and the assembly is allowed to fall with specified speed on to a rigidly mounted anvil. The deceleration of the headform is measured by means of a tri-axial accelerometer located within the headform. 5.3.2 Apparatus 5.3.2.1 Base The base shall be solid, made of steel or a combination of steel and concrete and have a mass of not less than 500 kg. At least the uppermost 25 mm shall consist of steel, which shall be firmly attached to the concrete if present. No part of t
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