1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2017 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/J3074_201702 SURFACE VEHICLE RECOMMENDED PRACTICE J3074 FEB2017 Issued 2017-02 Lumbar Flexion T
5、est Procedure for the Hybrid III 50thMale Dummy RATIONALE A bend test was designed to provide a force vs. angle requirement to accompany the existing durometer specification of the Hybrid III 50thrubber lumbar. TABLE OF CONTENTS 1. SCOPE 2 1.1 Purpose . 2 2. REFERENCES 2 2.1 Applicable Documents 2 2
6、.1.1 SAE Publications . 2 2.2 Related Publication . 2 2.2.1 Federal Publication . 2 3. CERTIFICATION PROCEDURES 2 3.1 Equipment Required . 2 3.2 Instrumentation Specifications 6 3.3 Test Preparation 7 3.4 Test Procedure 7 3.5 Performance Specifications 8 4. NOTES 8 4.1 Revision Indicator 8 FIGURE 1
7、NECK BRACKET REPLACEMENT 3 FIGURE 2 78051-179 SPINE BOX. 4 FIGURE 3 78051-362 SPINE BOX MOUNTING PLATE . 4 FIGURE 4 ANGLE REFERENCE PLANE 5 FIGURE 5 LUMBAR FLEXION TEST EQUIPMENT 5 FIGURE 6 HOLD POSITION FOR 30 MINUTES . 6 FIGURE 7 PULL DOWN ANGLE 52.5 WHEN SPINE IS 45 . 6 FIGURE 8 LUMBAR FLEXION TE
8、ST DEFINITION . 8 TABLE 1 PERFORMANCE CRITERIA 8 SAE INTERNATIONAL J3074 FEB2017 Page 2 of 8 1. SCOPE This procedure establishes a recommended practice for performing a Lumbar Flexion test to the Hybrid III 50th Male Anthropomorphic Test Device (ATD or crash dummy). This test was created to satisfy
9、the demand from industry to have a certification test which characterizes the lumbar without interaction of other dummy components. In the past, there have not been any tests to evaluate the performance of Hybrid III 50thlumbar. 1.1 Purpose The intent of this recommended practice is to develop a lum
10、bar flexion test procedure for the H-III50M dummy with test corridors for initial angle and force at 22.1, 32.1, and 42.1 angles. The test will utilize standard H-III family torso flexion test equipment. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this specificat
11、ion to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), ww
12、w.sae.org. SAE J211/1 Instrumentation for Impact Test - Part 1 - Electronic Instrumentation SAE J2856 Users Manual for the 50th Percentile Male Hybrid III Dummy 2.2 Related Publication The following publication is provided for information purposes only and are not a required part of this SAE Technic
13、al Report. 2.2.1 Federal Publication Copies of these documents are available online at http:/www.ecfr.gov. Motor Vehicle Regulation No. 572 Test Dummies SpecificationsAnthropomorphic Test Dummy for Applicable Test Procedures 3. CERTIFICATION PROCEDURES 3.1 Equipment Required a. Lower Torso Assembly
14、78051-070 (Without abdomen). b. Lumbar Spine 78051-66. c. Neck Bracket Replacement Figure 1 describes the generic shape, mass, and the pull point dimensions. SAE INTERNATIONAL J3074 FEB2017 Page 3 of 8 LUMBAR FLEXION PULL POINT Figure 1 - Neck bracket replacement SAE INTERNATIONAL J3074 FEB2017 Page
15、 4 of 8 d. Spine Box Assembly 78051-179 - Shown in Figure 2 without ballast mass insert. Figure 2 - 78051-179 Spine box e. Spine Box Mounting Plate Adapter 78051-362 - Shown in Figure 3 mounted between spine box and lumbar. Figure 3 - 78051-362 Spine box mounting plate f. Leg Assemblies 86-5001-001
16、(left); 86-5001-002 (right); lower legs and feet may be used, but not required. g. Pelvic Adapter The type of pelvic adapter is not critical, as long as it securely fastens to the pelvic instrumentation cover mounting holes and holds the entire assembly firmly with the back of the instrumentation co
17、ver mounting surface vertical (1) and maintains the pull relationships found in Figure 7. h. Angle Measurement Device To measure the back of the spine box angle at the instrument cavity. The design of this bracket is not critical, as long as it references the back of the instrumentation cavity. This
18、 is the reference plane for all angular measurements (Figure 4). SAE INTERNATIONAL J3074 FEB2017 Page 5 of 8 Angular reference plane is plane which the (4) instrument attachment screw holes are located Figure 4 - Angle reference plane i. Force Measurement Device To measure pull force in-line with th
19、e pull-down belt/cable. j. Test Fixture The test fixture consists of a standard torso flexion machine used for certifying the torso assemblies of other Hybrid III family dummies. An example of such device is seen in Figure 5. Figure 5 - Lumbar flexion test equipment SAE INTERNATIONAL J3074 FEB2017 P
20、age 6 of 8 k. Forward Pulling Mechanism The pulling mechanism must be able to pull the spine box forward to 45. The pulling belt/cable angle must be 52.5 (2) when the spine box is at 45. Figure 6 - Hold position for 30 minutes Figure 7 - Pull down angle 52.5 when spine is 45 l. Rearward Pulling Mech
21、anism The pullback mechanism must be able to pull the spine box back to 12.1 (2) forward of vertical and capable of holding this position for the hold time period. The angle of the pullback mechanism should be horizontal when the spine box is 12.1 forward. m. Data Collection System The data acquisit
22、ion system, including transducers, must conform to the specifications of the latest revision of SAE Recommended Practice J211/1 except for sample rate and channel filter class. Test sample rate must exceed 100 Hz and utilize a digital 4 pole butterworth forward filter with a cutoff frequency of 2 Hz
23、. 3.2 Instrumentation Specifications 3.2.1 A force transducer capable of measuring peak force. The peak force for this test will be approximately 500 N at the 45 peak pull angle. SAE INTERNATIONAL J3074 FEB2017 Page 7 of 8 3.2.2 The angle transducer must have a maximum error no greater than 0.25 ove
24、r the angular range being measured. This may be accomplished with linearization equations if needed. The nominal angular range for this test will be from 10 forward of vertical to 45 forward from vertical when measured on the back of instrumentation cavity cover. This test is very sensitive to angul
25、ar errors and care needs to be taken to ensure the accuracy of the angular readings are in accordance with this recommended practice. 3.2.3 Check that all transducers are properly installed, oriented, and calibrated. 3.3 Test Preparation 3.3.1 Soak the lumbar assembly in a controlled environment wit
26、h a temperature between 20.6 to 22.2 C (69 to 72 F) and a relative humidity from 10 to 70% for at least 4 hours prior to a test. The test environment should have the same temperature and humidity requirements as the soak environment. 3.3.2 Remove upper torso of dummy. 3.3.3 Remove lumbar and lumbar
27、cables. 3.3.4 Inspect the lumbar assembly for damage. 3.3.5 Attach neck bracket replacement to top of spine box. 3.3.6 Position the pull down and pull up belt/cable on the test fixture. NOTE: If using the dummys spine box, all attachments (including ballast mass insert) will need to be removed down
28、to the 78051-179 level. 3.3.7 Attach spine box mounting plate adapter to bottom of spine box. 3.3.8 Loosen lumbar cable torque and re-torque to 1.36 Nm 0.23 Nm (12 in-lb 2 in-lb) 3.3.9 Attach spine box to lumbar. 3.3.10 Attach torso assembly to test fixture (refer to Figure 8 for example). 3.3.11 At
29、tach angle sensor to the spine box at the instrument cavity location. 3.4 Test Procedure 3.4.1 Flex the spine box / lumbar assembly forward (3) times to 30 1.0 from vertical at a rate of 0.5 to 1.5 per second, and immediately release. 3.4.2 Bring the spine box/lumbar assembly up to vertical where ba
30、ck of spine box instrument cavity is 12.1 2 forward. 3.4.3 Hold spine box assembly at 12.1 2 for 30 minutes. 3.4.4 Remove the external support. Wait 2 minutes before measuring the spine box orientation angle of the torso reference plane. 3.4.5 Record initial position after 2 minutes. 3.4.6 Flex the
31、spine box assembly forward to a maximum 45, but no less than 43 relative to the torso reference plane, at a rate of 0.5 to 1.5 per second. Record each force when the torso reference plane reaches 22.1, 32.1, and 42.1 from vertical. The spine box must meet the performance criteria shown in Table 1. 3
32、.4.7 Wait at least 30 minutes between successive tests. NOTE: The pre-flex will be performed in each successive test. SAE INTERNATIONAL J3074 FEB2017 Page 8 of 8 3.5 Performance Specifications 3.5.1 When the spine box assembly is flexed, the lumbar spine must meet the performance criteria shown in T
33、able 1. Table 1 - Performance criteria Test Parameter Test Corridor Initial Angle 10.1-15.5 Force at 22.1 135 N 45 N Force at 32.1 225 N 45 N Force at 42.1 330 N 45 N Pelvis Adaptor Back of pelvis instrumentation cavity cover surface is to vertical Pull point (determined in Figure 7) Figure 8 - Lumb
34、ar flexion test definition 4. NOTES 4.1 Revision Indicator A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the docume
35、nt title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE SUBCOMMITTEE DUMMY TESTING AND EQUIPMENT STANDARDS OF THE HUMAN BIOMECHANICS AND SIMULATIONS COMMITTEE
