关键词: 特种车辆；抗冲击设计；加速度测试

Abstract: Special vehicles impose significantly higher requirements for seismic resistance than ordinary vehicles due to their special structures and harsh operating conditions. Current traditional testing methods cannot meet the seismic assessment needs of special vehicles under extreme temperature differences, complex road conditions and high-acceleration impact scenarios. This experiment adopts high-precision vibration testing technology (with a test frequency range of 1～ 1 000 Hz and a spectral resolution of 1 024 lines), combines amplitude spectrum curve analysis and simultaneous frequency sampling methods, accurately locates the key seismic resistance points of the EQ2050 special vehicle, and verifies whether its impact-resistant design complies with the equipment design national standard specified in Terms of Reliability, Maintainability and Supportability (GJB 451A－2005). The research focuses on three aspects of work: first, clarifying the key seismic resistance points of special vehicles by combining the automobile production process and field working condition investigation; second, completing the acceleration data collection of special vehicles under multiple working conditions by adopting the optimized sampling and testing scheme after installing shock absorbers; third, establishing a standardized process for seismic resistance testing of special vehicles and forming a generalizable seismic assessment system based on suspension acceleration data under different working conditions. The research results show that the suspension system of the EQ2050 special vehicle meets the requirements of national standards, and the established testing process can effectively improve the detection accuracy of vibration characteristics of special vehicles, providing key technical support for the seismic design verification of military and various special vehicles.

Key words: special vehicle; impact resistance design; acceleration test