Improvement of roof strength of truck cab based on new regulations

doi:10.3969/j.issn.1674-8484.2024.02.003

Abstract

Abstract:

The survival space and top bearing capacity of a heavy truck cab in the crash test cannot meet the roof strength requirements in Protection of the Occupants of the Cab of Commercial Vehicl (GB 26512-2021). In order to improve the top bearing capacity and increase the survival space of the passengers, the finite element analysis (FEA) model of the side-top pressure impact of the cab was established, and the effectiveness of the model was verified by simulation and test benchmarking. According to the energy transmission characteristics of the body frame structure and the closed cavity, the weak parts such as A-pillar, rear wall and roof were locked accurately, and the effective optimization plan was formulated. The result shows that dredging the key force transmission paths such as the A-pillar, roof and rear wall, and forming a closed cavity section can effectively improve the roof strength, so that the top bearing capacity of the cab can be increased from 70 kN to 102 kN under the premise of satisfying survival space, the carrying capacity has increased by 31.3%. The structural optimization idea can provide theoretical guidance for the design and development of body structure.

Key words: commercial vehicle cab, roof strength, structure optimization, finite element analysis model (FEA)

CLC Number:

U463.83

ZHU Haiyun, LIU Qingyun, LI Qi, SONG Huibin, GUO Ruiwu, ZHAO Yang. Improvement of roof strength of truck cab based on new regulations[J]. Journal of Automotive Safety and Energy, 2024, 15(2): 161-168.

Figures/Tables 20

References 22

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