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1、INTERNATIONAL STANDARD IS0 1496-3 Fourth edition AMENDMENT 1 1995-03-01 2006-02-01 Series I freight containers - Specification and testing - Part 3: Tank containers for liquids, gases and pressurized dry bulk AMENDMENT 1: Testing of the external rest rai n t (long it u d i na I) d ynam ic Conteneurs
2、 de la srie 1 - Spcifications et essais - Partie 3: Conteneurs-citernes pour les liquides, les gaz et les produits solides en vrac pressuriss AMENDEMENT 1: Essais de sollicitation extrieure (longitudinale) dynamique Reference number - E - = IS0 1496-3: 1995/Amd. 1 :2006(E) EISO: - - - - IS0 2006 Ref
3、erence number - E - = IS0 1496-3: 1995/Amd. 1 :2006(E) EISO: - - - - IS0 2006 IS0 1496-3: 1995/Amd. 1 :2006( E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces whi
4、ch are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The IS0 Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems In
5、corporated. Details of the sofiware products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IS0 member bodies. In the unlikely event
6、that a problem relating to it is found, please inform the Central Secretariat at the address given below. O IS02006 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
7、 and microfilm, without permission in writing from either IS0 at the address below or ISOs member body in the country of the requester. IS0 copyright office Case postale 56 CH-I21 1 Geneva 20 Tel. + 41 22 749 O 1 11 Fax +41227490947 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii
8、 O IS0 2006 -All rights reserved IS0 1496-3:1995/Amd.l:2006(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical com
9、mittees. Each member body interested 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. IS0 collaborates closely with the
10、 International Electrotechnical Commission (I EC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft Internati
11、onal Standards adopted by the technical committees are circulated to the member bodies for voting. Publication 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 document may be
12、the subject of patent rights. IS0 shall not be held responsible for identifying any or all such patent rights. Amendment 1 to IS0 1496-3: 1995 was prepared by Technical Committee ISOTC 104, Freight containers, Subcommittee SC 2, Specific purpose containers. O IS0 2006 -All rights reserved iii IS0 14
13、96-3:1995/Amd.l:2006(E) Series I freight containers - Specification and testing - Part 3: Tank containers for liquids, gases and pressurized dry bulk AMENDMENT 1 : Testing of the external restraint (longitudinal) dynamic Page 1, Clause 2 Add the following Normative reference: IS0 6487, Road vehicles
14、 - Measurement techniques in impact tests - Instrumentation Pages 2 and 3 Add the following definitions: 3.14 test platform device, either stationary or moving, used to support the tank container under test and directly receiving the impact 3.15 damping ratio ratio of actual damping coefficient to c
15、ritical damping coefficient 3.16 single degree of freedom system SDOF system system for which only one coordinate is required to completely describe that system at any instant of time 3.17 shock response spectrum SRS plot of the maximum response experienced by a single degree of freedom system, as a
16、 function of its own natural frequency, in response to an applied shock 3.18 minimum shock response spectrum minimum SRS reference curve representing the minimum shock response spectrum for a test to be valid (see Figure D.l) 3.19 octave doubling of frequency O IS0 2006 -All rights reserved 1 -,-,-
17、IS0 1496-3: 1995/Amd. 1 :2006( E) Page 9, subclause 6.6 Amend the title and text to read as follows: 6.6 Tests No. 5 - Internal restraint (longitudinal) (dynamic) 6.6.1 General This test shall be carried out to prove the ability of tank containers to withstand longitudinal internal restraint under d
18、ynamic conditions of railway operation. 6.6.2 Procedure This test shall be conducted in accordance with the procedure specified in Annex D. 6.6.3 Requirements On completion of the test, the tank container shall not show leakage or permanent deformation or abnormality that will render it unsuitable f
19、or use, and the dimensional requirements affecting handling, securing and interchange shall be satisfied. Page 16, Figure A. 7 Replace Figure A.7 by new figure below: A.7 Internal restraint (longitudinal) dynamic Test No. 5 Page 16 Delete Figure A.8. Page 16, 17, and 18 Renumber Figures A.9 to A.23
20、as A.8 to A. 22. 0,97 W 0,97 W . ._ . . . ._ . . : Page 24 Insert new Annex D as follows: 2 O IS0 2006 -All rights reserved IS0 1496-3:1995/Amd.l:2006(E) Annex D (normative) Dynamic longitudinal impact test D.l Test sample Ensure the tank container under test (hereafter referred to as container-unde
21、r-test) is representative of the tank container design for which conformity confirmation is being sought (design type). Permitted design variations: a) a reduction of 10 % or an increase of 20 % in capacity (resulting from variations in diameter and length); b) a decrease in maximum gross mass; c) a
22、n equal or greater thickness, independent of design pressure and temperature; d) a change to the grade of material of construction provided that the permitted yield strength meets or exceeds that of the tested container; e) a change of location or a modification to nozzles and manways. D.2 Test appa
23、ratus D.2.1 Test platform The test platform may be any suitable structure having securing devices in accordance with IS0 1161, which is capable of achieving and sustaining without permanent damage the prescribed shock seventy with the container-under-test mounted securely in place. The test platform
24、 shall be a) configured so as to allow the container-under-test to be mounted as close as possible to the impacting end; b) fitted with four securing devices in good condition; c) equipped with a cushioning device for the purpose of achieving a suitable duration of impact. D.2.2 Impact creation The
25、impact may be created by: a) the test platorm striking a stationary mass, or b) the test platform being struck by a moving mass. When the stationary mass consists of two or more railway vehicles connected together, each railway vehicle shall be equipped with cushioning devices. Free play between the
26、 vehicles shall be eliminated and the brakes on each of the railway vehicles shall be applied. O IS0 2006 -All rights reserved 3 -,-,- IS0 1496-3: 1995/Amd. 1 :2006( E) D .2.3 Measu ri nghecordi ng system D.2.3.1 with IS0 6487. Unless otherwise specified within this International Standard, the measu
27、ring system shall comply D.2.3.2 The following equipment shall be available for the test: a) Two accelerometers with a minimum amplitude range of 200 g, a maximum lower frequency limit of 1 Hz and a minimum upper frequency limit of 3 O00 Hz. Each accelerometer shall be rigidly attached to the outer
28、end or side face of the two adjacent bottom corner fittings closest to the impact source, and aligned so as to measure the acceleration in the longitudinal axis. The preferred method is to attach each accelerometer to a flat mounting plate by means of bolting and to bond the mounting plates to the c
29、orner fittings. b) A method of measuring the impact velocity. c) An analogue-to-digital data acquisition system capable of recording the shock disturbance as an acceleration versus time history at a minimum sampling frequency of 1 O00 Hz and incorporating a low- pass anti-aliasing analogue filter wi
30、th a corner frequency set to a minimum of 200 Hz and a maximum of 20 % of the sampling rate and a minimum roll off rate of 40 dB/octave. d) A method of permanently storing in electronic format the acceleration versus time histories so that they can be subsequently retrieved and analysed. D.2.4 Proce
31、dure a) The container under test shall be filled with a quantity of water or any other non-pressurized product to approximately 97 % volumetric capacity, ensuring that it is not pressurized during the test. However, if for reasons of overload it is not possible to fill to 97 % of the capacity, then
32、the test mass of the container (tare and product) shall be as close as possible to R. Measure and record the as-tested payload mass. NOTE Filling may be undertaken before or after mounting on the test platform. b) The container under test shall be placed on the test platform as close as possible to
33、the impacting end, with the container end considered to be more vulnerable to impact damage facing the point of impact. All four bottom corners of the container shall be locked in position by means of the corner fittings restraining movement in all directions. c) Create an impact (D.2.2) such that f
34、or a single impact the as tested SRS at both corner fittings equals or exceeds the minimum SRS shown in Figure D.l at all frequencies within the range 3 Hz to 100 Hz. NOTE Repeated impacts may be required to achieve this result. d) Examine the container under test for evidence of any faults and reco
35、rd the result. D.2.5 Analysis/processing of data D.2.5.1 Data reduction system Reduce the acceleration time history data from each channel to the shock response spectrum, ensuring that the spectra are presented in the form of equivalent static acceleration plotted as a function of frequency. The max
36、imum absolute value acceleration peak will be recorded for each of the specified frequency break points, thus producing what is commonly referred to as the maximal acceleration shock response spectrum. The data reduction will follow the following criteria: 1) If required, the corrected impact accele
37、ration time history data shall be generated using the procedure outlined in D.2.5.2. 4 O IS0 2006 -All rights reserved IS0 1496-3:1995/Amd.l:2006(E) 2) The time-history data shall comprise the period commencing 0,05 s prior to the start of the impact event and the 2,O s thereafter. 3) The analysis s
38、hall span the frequency range of 2 Hz to 100 Hz with a minimum of 1/30 octave break points. Each break point, or bin in the range shall constitute a natural frequency, and, 4) A damping ratio of 5 % shall be used in the analysis. Calculation of the test shock response curve data points shall be made
39、 as described below. For each frequency bin: a) Calculate a matrix of relative displacement values, ci, using all data points from the shock input acceleration time history using the following equation: where At is the time interval between acceleration values; Ud is the damped natural frequency = w
40、nJ1 - c2 ; i is the integer number, varies from 1 to the number of input acceleration data points; k is the parameter used in summation which varies from O to the current value of i; gk is the Mh value of acceleration input data; 6 is the damping ratio; w, is the undamped natural frequency (in rad/s
41、). b) Calculate a matrix of relative accelerations, ci, using the displacement values obtained in step 1) in the following equation: c) Retain the maximum absolute acceleration value from the matrix generated in step 2) for the frequency bin under consideration. This value becomes the shock response
42、 spectrum (SRS) curve point for this particular frequency bin. Repeat step 1) for each natural frequency until all natural frequency bins have been evaluated. d) Generate the test shock response spectrum curve. O IS0 2006 -All rights reserved 5 -,-,- IS0 1496-3: 1995/Amd. 1 :2006( E) D.2.5.2 Method
43、for scaling measured acceleration versus time history values to compensate for under or over mass containers. Where the sum of the as-tested payload mass plus tare mass of the container under test is not the maximum rated mass of the container under test, apply a scaling factor to the measured accel
44、eration time histories for the container-under-test as follows: Calculate the corrected acceleration-time values, Acc(t) (corrected), from the measured acceleration time values, by use of the following formula: where Acc(t) (measured) is the actual measured-time value; Ml is the mass of the test pla
45、tform, without the container under test; M 2 is the actual test mass (including tare) of the container under test; where R is the maximum rated mass (including tare) of the container under test. The test SRS values shall be generated from the Acc(t) (corrected) values. D.2.6 Defective instrumentatio
46、n D.2.6.1 Defective accelerometer signal In the case where the acquired signal is defective, the test may be validated with the SRS from the functional accelerometer after three consecutive impacts provided that the SRS from each of the three impacts meets the minimum requirements. D.2.7 Optional te
47、st method In the case where the SRS curves obtained have correct features but remain below the minimum SRS curve, the test may be validated if three successive impacts are performed as follows: - first impact at a speed higher than 90 % of the critical speed; - second and third impact at a speed hig
48、her than 95 % of the critical speed. In addition all of the following conditions shall be met: a) A critical speed shall already have been established. The critical speed corresponds to the speed where the cushioning devices reach their maximum travel and energy absorption capacity, beyond which it
49、has been determined that the minimum SRS curve is normally obtained or exceeded. b) The critical speed has been established after at least five documented tests using five different tank containers. Each of the tests shall have been performed using the same equipment, measuring system and procedure. c) The design of the container under test is significantly different from any other 204. tank container having been successfully subjected to the dynamic