Responses of Cylindrical Shell Loaded by Ezplosive Rods to Simulate X-ray Effects: Numerical Simulation and Fidelity Analysis
Responses of reentry structures subjected to X-ray blow-off impulses in hostile environments are significantly important for weapon design and validation. Without actual radiation environments, some test simulation techniques are used to generate equivalent or similar loads in laboratory. This paper focuses on test simulation using explosive rods and its fidelity. Firstly, the prior fast method for continuously distributed loads was modified to calculate responses to naturally discretized loads generated by explosive rods. Then the proposed method is validated using a simple example. Finally, a number of numerical simulations were performed. The influences of three factors on the fidelity of test simulation were investigated, including the number of explosive rods, non-simultaneity of loading-rod initiation and detonation failure of a single rod. The results show that, for Φ300mm cylindrical shell, the relative errors of peak stress keep less than 20％ if the number of explosive rods reaches 15, less than 8％ under 14μs non-simultaneity and less than 12％ when a single rod fails to be initiated.
impact dynamics structural response cylindrical shell X-ray blow-off impulse
Y.J.Mao Y.L.Li H.J.Deng H.J.Huang
School of Aeronautics,Northwestern Polytechnical University,Xian 710072,Shaanxi,China;Institute of School of Aeronautics,Northwestern Polytechnical University,Xian 710072,Shaanxi,China Institute of Structural Mechanics,China Academy of Engineering Physics,Mianyang 621900,China
国际会议
南京
英文
1-8
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）