## 2 Shock Tube Experimental Setup
### Shock Tube Experimental Cases
The experimental setup for case 1-2 involved detuning TNT on the left side of the driver section while the driver section was sealed, the expansion section was not used, and the target was in contact with the shock tube. Tables 12-14 show the peak incident pressure measured. The COV values ranged from 0.01 to 0.15. \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Case**} & \multirow{2}{*}{**Round**} & \multirow{2}{*}{**TNT (kg)**} & \multirow{2}{*}{**Sealing Status**} & \multicolumn{6}{c}{**Peak Incident Pressure (MPa)**} \\ \cline{5-10}  & & & **Pso 1** & & **Pso 2** & & **Pso 3** & & **Pso 4** & **Pso 5** & **Pso 6** & **Pso 7** \\ \hline \multirow{3}{*}{1-2} & 12 & 8.8 & Sealed & 3.61 & 2.14 & 2.04 & 1.59 & 2.16 & 1.90 & 1.89 \\ \cline{2-10}  & 13 & 8.8 & Sealed & 2.76 & 2.60 & 2.19 & 1.63 & 2.22 & 2.06 & 1.90 \\ \hline \multicolumn{10}{c}{COV} & 0.13 & 0.1 & 0.04 & 0.01 & 0.01 & 0.04 & 0.003 \\ \hline \hline \end{tabular}
\end{table} 
Table 13: Measured peak incident pressure in case 1-2 (TNT of 8.8 kg). \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Case**} & \multirow{2}{*}{**Round**} & \multirow{2}{*}{**TNT (kg)**} & \multirow{2}{*}{**Sealing Status**} & \multicolumn{6}{c}{**Peak Reflected Pressure (MPa)**} & \multirow{2}{*}{**COV**} \\ \cline{5-10}  & & & & **Pr 1** & & **Pr 2** & & **Pr 3** & & **Pr 4** & **Pr 5** & \\ \hline \multirow{3}{*}{1-1} & 7 & 13.5 & Sealed & 12.01 & 13.64 & 10.72 & 5.7 & 7.67 & 0.29 \\  & 8 & 18 & Sealed & 12.87 & 13.49 & 11.52 & 7.59 & 18.09 & 0.27 \\ \hline \hline \end{tabular}
\end{table} 
Table 11: Measured peak reflected pressures in case 1-1 (TNT of 13.5 kg and 18 kg). Figure 6: Reflected pressure histories in round 2. Figure 7 shows the incident pressure history at Pso 2, Pso 5, and Pso 7 during round 12, where two peaks were observed. Table 15 shows the arrival times of first and second peak pressures. The secondary peak arrival sequence was observed in the order of Pso 7, Pso 5, and Pso 2, which is likely due to the pressure reflected from the target. Therefore, when the TNT was positioned on the left side in a sealed driver section, two peak incident pressures were observed, but only one peak pressure affected the target. In this configuration, wave propagation occurred, while superposition also took place simultaneously, increasing the pressure and resulting in a single peak. Tables 16 and 17 present the peak reflected pressure for case 1-2. The COV values for the uniform pressure measurements ranged from 0.067 to 0.15. This was lower compared to the COV values of case 1-1 (0.2 to 0.29). Therefore, it can be concluded that case 1-2 exhibited a load profile that was more similar to a uniform pressure than case 1-1. The COV values for reproducibility in this experiment ranged from 0.068 to 0.14, indicating higher reproducibility compared to the results obtained in open-field experiments (COV 0.23 to 0.3). \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Case**} & \multirow{2}{*}{**Round**} & \multicolumn{2}{c}{**TNT**} & \multirow{2}{*}{**Sealing**} & \multicolumn{4}{c}{**Peak Reflected Pressure (MPa)**} & \multirow{2}{*}{**COV**} \\ \cline{3-3} \cline{5-10}  & & **(kg)** & & & & **P 1** & **Pr 2** & **Pr 3** & **Pr 4** \\ \hline \multirow{3}{*}{1-2} & 9 & 4.4 & Sealed & 6.17 & 4.99 & 6.13 & 5.66 & 0.083 \\  & 10 & 4.4 & Sealed & 5.37 & 5.02 & 5.46 & 6.04 & 0.067 \\  & 11 & 4.4 & Sealed & 6.67 & 5.87 & 6.43 & 7.25 & 0.076 \\ \hline \multicolumn{3}{c}{COV} & \multicolumn{4}{c}{0.088} & 0.077 & 0.068 & 0.11 & \\ \hline \hline \end{tabular}
\end{table} 
Table 16: Measured peak reflected pressure in case 1-2 (TNT of 4.4 kg).