GB 17578-2013Requirements and test methods of strength for the superstructure of bus (English PDF)

Foreword

Clauses 4.1 and 4.2 in this standard are mandatory. The rest are recommended.

This standard was drafted in accordance with the rules, which are given in GB/T 1.1- 2009.

This standard replaces GB/T 17578-1998 "Provisions of strength for the superstructure of bus".

Compared with GB/T 17578-1998, the main changes of this standard are as follows:

- CHANGE the standard attributes from recommended to mandatory;

of bus" to "Requirements and test methods of strength for the superstructure of bus";

- ADD and MODIFY the terms and definitions (Chapter 3 of the 1998 edition; Chapter 3 of this edition);

- ADD the loading mass of the rollover test. The original test mass is the kerb mass of the whole vehicle, which is now changed to the unladen kerb mass or the total effective mass (5.1.1 of the 1998 edition; 4.3.1 of this edition);

- ADD the four equivalent test methods, including body section rollover test, body section quasi-static load test, quasi-static calculation based on test components, computersimulated vehicle rollover test (see 4.4 and Appendix E ~ Appendix H) ;

- ADD the provisions for the test method of articulated buses (see 4.5);

- ADD the provisions for the direction of the rollover test (see 4.6);

- ADD the judgment principle on the same type (see Chapter 5);

edition; Appendix C of this edition);

- ADD that the rollover test bench shall have sufficient rigidity and sufficiently controllable rotational speed, to ensure the synchronization of the lifting axle (see C.1.1);

- ADD the error of 800 mm height difference, between the initial horizontal plane of the tilting platform and the impact surface (see C.1.2);

- ADD a description of the detailed dimensions of the wheel guards [see C.1.4a)];

- ADD the description of the counterweight on the seat, which is equipped with restraint device [see C.2.1e)];

- ADD the provisions that the vehicle suspension system shall be locked, during the test [see C.2.2b)];

- ADD test instructions for articulated buses (see C.2.3);

- ADD the provisions for the location of high-speed cameras (see C.3.4);

- ADD the descriptions on the rollover test documentation (see C.4);

- ADD the technical documents, which are required for the type approval test (see Appendix D);

- ADD the measurement of the centroid of the vehicle (see Appendix I);

- ADD structural basic description about superstructure (see Appendix J).

This standard was complied, using the redrafting method, with reference to the technical contents of the 01 edition of ECE R66 Uniform technical prescriptions concerning the approval of large passenger vehicles with regard to the strength of their superstructure, which was promulgated by the United Nations Economic Commission for Europe on February 22, 2006, as well as its amendments and errata sheets.

This standard provides a comparison list of the chapter number, between this standard and the ECE R66, in Appendix A. Appendix B provides list of technical differences with ECE R66 and their reasons, for reference.

For ease of use, this standard has also made the following editorial changes to ECE R66:

a) CHANGE the word "this Regulation" into "this standard";

b) ADD the foreword of Chinese standard.

This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.

This standard shall be under the jurisdiction of the National Automotive Standardization Technical Committee (SAC/TC 114).

Machinery Co., Ltd., Xiamen Jinlong United Automobile Industry Co., Ltd.

The participated drafting organizations of this standard: Highway Science Research Institute of the Ministry of Transport, Zhengzhou Yutong Bus Co., Ltd., Hunan University, National Bus Quality Supervision and Inspection Center, National Automobile Quality Supervision and Inspection Center (Xiangfan), Dongfeng Commercial Vehicle Technology Center, National Motor Vehicle Quality Supervision and Inspection Center (Chongqing), King Long United Automobile Industry (Suzhou) Co., Ltd., Dandong Huanghai Automobile Co., Ltd., Beiqi Foton Motor Co., Ltd. Beijing New Energy Bus Branch, Nanjing Iveco Automobile Co., Ltd., Jinhua Youth Automobile Manufacturing Co., Ltd., Anhui Ankai Automobile Co., Ltd., Xi'an Xiwo Bus Co., Ltd., China Automotive Engineering Research Institute Co., Ltd.

The main drafters of this standard: Sun Ying, Zhao Dongxu, Pei Zhihao, Duan Yong, Nie Yuming, Liu Jiannong, Dong Xiaokun, Zhang Weigang, Wang Xin, Wang Zuozu, Liu Xueqiong, Ruan Tingyong, Zhao Wei, Guo Yingchun, Zhao Tianhong, Deng Yulin, Li Dongmei, Zhao ideal, Chen Yanfu, Wu Jianhua, Wu Changfeng, Zhang Chengang, Xie Qingxi, Cui Haitao, Tan Zhenyuan, Zhang Hongquan, Wang Wanyu.

1 Scope

This 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 references

The 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.

3 Terms and definitions

The following terms and definitions apply to this document. A group of current or future vehicle types, that meet or exceed the worst-case test requirements, according to this standard. 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. 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. Space for passengers, excluding space occupied by fixed facilities, such as bars, kitchens or toilets. 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. A vertical plane, which passes through the midpoint of the front axle and the midpoint of the rear axle. During the rollover test, the remaining space, which is provided in the passenger compartment, the driving area, the compartment, for the passengers, driver, crew to survive. The mass of vehicles in operable condition, which does not carry passengers, cargo, but includes the mass of the driver (and carry-on luggage) of 75 kg, the mass of 90% The sum of the masses of passengers and crew members, that are seated in restrained seats. The sum of the vehicle's unladen kerb mass (Mk) and a portion of the total restricted occupant mass (Mm) (see Appendix C). […]

4 Technical requirements and test methods

5 Judgment of same type

5.1 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:

a) Structural strength: Compared with the basic vehicle type, the superstructure is not changed or the new structure has better strength;

b) Reference energy: The reference energy is the same as or smaller than that of the basic vehicle type;

c) Residual space: Every contour line of the residual space is within the residual space of the basic vehicle type.

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 standard

For 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 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 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. There are corresponding terms and definitions in Chinese standard, AND the defined content is basically the same, so this standard does not repeat the definition into "total restricted occupant mass" In order to avoid "Total occupant mass" being misunderstood as the sum of the mass of "all occupants". This expression is more precise and easier to understand Adopt the occupant mass, which is specified in GB/T 12428 and special school bus standards vehicle (such as pillars, handles, luggage racks, etc.) shall not invade the residual space during the test", add that fire extinguishers are not allowed to In order to increase the manufacturer's attention to the firm installation of fire extinguishers, in the rollover test, fire extinguishers once fell and invaded the residual space, which seriously affected the safety of passengers residual space (such as vertical handles, bays, small kitchens, toilets, etc.) shall not protrude beyond the contour of the deformed structure.", add that the seats shall not protrude beyond the contour of the deformed structure Reason: During the rollover test, some seats were not firmly installed and fell down and invaded the residual space, which seriously affected the safety of passengers. In order to increase the manufacturer's attention to the firmness of the seat installation, it is recommended to add the seat in brackets. handles, bays, small kitchens, toilets, etc.) shall not have the potential to cause occupant injury, meanwhile it shall not protrude structure. […]

Appendix C Basic test method -- Vehicle rollover test