Study on the Parameter Sensitivity of RHT Concrete Model by Orthogonal Test Technique

Based on theoretical analysis, analytical parameters A, N, B, M, B_Q, f_s/f_c, T_ten,D₁ and E_f,min were analyzed by orthogonal test to assess the sensitivity of parameters in the RHT concrete model. The Autodyn program was used to simulate the penetration depth of the projectile with different parameters and different values. The sensitivity of the parameters was quantitatively analyzed, and the nine parameters were ranked as:B > E_f,min > T_ten > f_s/f_c > N>M > D₁ > B_Q > A. The comparative analysis of damage nephogram and penetration depth derived from three typical numerical tests indicate that the parameters B, E_f,min and T_ten have a significant influence on the numerical simulation results, which should be accurately determined by reliable technical means.