GB 17578-2013 PDF EnglishUS$665.00 · In stock · Download in 9 seconds
GB 17578-2013: Requirements and test methods of strength for the superstructure of bus Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB 17578: Historical versions
Similar standardsGB 17578-2013: Requirements and test methods of strength for the superstructure of bus---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB17578-2013NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.020 T 09 Replacing GB/T 17578-1998 Requirements and test methods of strength for the superstructure of bus Issued on. SEPTEMBER 18, 2013 Implemented on. JULY 01, 2014 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of PRC; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 6 2 Normative references... 6 3 Terms and definitions... 6 4 Technical requirements and test methods... 11 5 Judgment of same type... 15 6 Transition requirements for implementation of standard... 16 Appendix A (Informative) Comparison of clause number between this standard and ECE R66... 17 Appendix B (Informative) The technical differences between this standard and ECE R66 and their reasons... 19 Appendix C (Normative) Basic test method -- Vehicle rollover test... 24 Appendix D (Normative) Technical documents required for type approval test... 31 Appendix E (Normative) Equivalent test method 1 -- Body section rollover test... 33 Appendix F (Normative) Equivalent test method 2 -- Quasi-static load test of body section... 37 Appendix G (Normative) Equivalent test method 3 -- Quasi-static calculation based on test components... 43 Appendix H (Normative) Equivalent test method 4 -- Computer simulated vehicle rollover test... 50 Appendix I (Normative) Measurement of the centroid of vehicle... 54 Appendix J (Normative) Basic explanation about the structure of the superstructure 59 References... 651 ScopeThis standard specifies the technical requirements and test methods for the strength of the superstructure of buses. This standard is applicable to grade B, grade II, grade III buses and special school buses of categories M2 and M3.Other buses in categories M2 and M3 can be implemented with reference to this standard.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB 11551 The protection of the occupants in the event of a frontal collision for motor vehicle3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Group of vehicle types A group of current or future vehicle types, that meet or exceed the worst-case test requirements, according to this standard. 3.2 Worst case In a group of vehicle types, the vehicle that is least likely to meet the superstructure strength requirements of this standard. The three parameters to determine the worst state are structural strength, reference energy, residual space. 3.3 Double-deck bus A vehicle, in which at least a part of the passenger space is arranged on two upper and lower floors, meanwhile there is no standing passenger space on the upper floor. 3.4 Passenger compartment Space for passengers, excluding space occupied by fixed facilities, such as bars, kitchens or toilets. Note. Rewrite GB/T 4780-2000, definition 3.22. 3.5 Occupant restraint A device, that secures a passenger, driver or crew member in their seat; AND reduces the degree of injury to the wearer, by restricting the wearer's physical movement, in a rollover accident.4 Technical requirements and test methods4.1 General requirements 4.1.1 The superstructure of the vehicle shall have sufficient strength, to ensure that the residual space is not invaded, during and after the rollover test of the vehicle. 4.1.2 During the test, other parts of the vehicle outside the residual space (such as pillars, handles, luggage racks, fire extinguishers, etc., excluding structural components in the residual space) shall not invade the residual space during the test, nor shall any structural parts be completely disconnected. 4.2 Residual space The outline of the vehicle's residual space is determined, by creating a vertical cross- section in the cabin, the edges of which are shown in Figure 2a) and Figure 2b); this vertical cross-section is moved across the entire length of the vehicle as follows [see Figure 2c)]. 4.3 Vehicle rollover test as the basic test method 4.3.1 Place the whole vehicle on a tiltable tilting platform (see Figure 3). Lock the suspension. Then slowly tilt to an unstable equilibrium position. For the vehicle types without occupant restraint devices, they are tested according to the unladen kerb mass. For the vehicle types equipped with occupant restraint devices, they are tested according to the total effective mass of the vehicle. 4.3.2 The rollover test starts from the unstable position of the vehicle; the initial angular velocity is 0; it turns around the wheel-tilting platform plane's contact point, as the rollover axle. The vehicle characteristics at this time are represented by the reference energy ER (see Appendix D and Figure 3). 4.3.3 The vehicle rolls from the tilting platform and hits the horizontal, dry flat concrete impact plane, which has a drop of 800 mm. 4.3.4 As the basic test method, it uses the whole vehicle to carry out the rollover test; its detailed provisions are as shown in Appendix C. 4.4 Equivalent test method 4.5 Tests on hinged buses Each rigid segment of a hinged bus shall comply with the provisions of 4.1.Each connected rigid segment of the vehicle can be tested individually, or connected for testing, see C.2.3 of Appendix C and I.2.6 g) of Appendix I. 4.6 Orientation of rollover test When carrying out the rollover test, it shall be directed towards the more dangerous side of the vehicle's residual space, which is determined by the testing agency, on the basis of the manufacturer's recommendations, taking into account at least the following factors. 4.7 Alternative requirements for grade-B buses For grade-B buses, it shall meet the requirements in 4.1 ~ 4.4 and 4.6, OR it shall be proved by tests or other appropriate methods, that the vehicle structure is sufficient to withstand the uniformly distributed static load, which is equivalent to the maximum design total mass of the vehicle AND is applied on the roof.5 Judgment of same type5.1 Take the vehicle type, that has passed the test, as the basic model. When making the judgement of same type for other vehicle types, it shall be based on the following triple principle, in the worst case. 5.2 If all three aspects in 5.1 are met, it can be judged as the same type. If not, it needs to be re-tested. If one or two are met, further analysis and confirmation (such as test, calculation, structural analysis, etc.) are required.6 Transition requirements for implementation of standardFor the provisions of 4.3.1 and the provisions on loading according to the total effective mass in Appendix C ~ Appendix H, it shall be implemented, 12 months after the implementation of this standard.Appendix A(Informative) Comparison of clause number between this standard and ECE R66 Table A.1 shows the comparison of clause number between this standard and ECE R66.Appendix B(Informative) The technical differences between this standard and ECE R66 and their reasons Table B.1 gives the technical differences between this standard and ECE R66 as well as their reasons. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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