## 5 Results of Experimental Test
### Configuration B  
Configuration B featured four orifices located at the edges of the piston plate. Cyclic load testing was conducted for Configuration B with orifices of 1 mm and 2 mm diameters, and piston plate movements ranged from 10 mm to 40 mm. Figures 23 and 24 illustrate the time history and hysteresis results for Configuration B. The results show that the load generated by the viscous plane damper increases with both displacement and velocity. As the movement velocity of the piston plate increases, the load produced inside the box barrel also increases. This increase in load is attributed to the fluid movement within the box barrel. Notably, the total cross-sectional open area does not significantly affect the fluid flow through the orifices when it comes to increasing the load produced in the barrel. However, a fixed cross-sectional open area does contribute to an increase in the damping force. The peak values of the damping force for different cyclic test amplitudes are listed in Table 6. The results indicate that the damping force increased with the piston plate movement. For Configuration B, the force generated by the viscous plane damper was higher compared to that for Configuration A. This observation aligns with the findings reported by [PERSON] (2006), which demonstrated that the capacity of a damper to dissipate external energy is influenced by the velocity of the viscous fluid moving inside the damper. When the orifice diameter is larger, the velocity of the fluid tends to decrease due to the lower pressure required to push the fluid through [33]. Similarly, [PERSON], [PERSON], [PERSON], and [PERSON] (2010) tested electro-rheological fluid dampers with a constant orifice diameter [34]. The results Indicate that varying fluid viscosity can enhance the force exerted by the damper to reduce piston plate movement. Table 6 shows the force capacity of the viscous plane damper for Configuration B, where the performance notably improved, especially with the 1 mm diameter orifice, which was 50% higher than that of the 2 mm diameter orifice. The same type of fluid was used across tests to ensure consistency in the results. Reducing the cross-sectional area of the orifices increased the fluid pressure, thus generating higher drop pressure inside the box barrel, which, in turn, led to a greater damping force. This observation aligns with the experimental study by [PERSON] (2008), which demonstrated that increased liquid compression within the barrel could generate more force. On average, the load produced by Configuration B with the 1 mm diameter orifice was 90% higher than that with the 2 mm diameter orifice across piston plate movements ranging from 10 mm to 40 mm [35]. \begin{table}
\begin{tabular}{c c c} \hline \multicolumn{3}{c}{**Experimental Results for Configuration A**} \\ \hline \multirow{3}{*}{Movement of Piston Plate (mm)} & \multicolumn{2}{c}{Diameter (mm)} \\ \cline{2-3}  & 10 & 5 \\ \cline{2-3}  & \multicolumn{2}{c}{Force (kN)} \\ \hline
10 & 1.14 & 0.58 \\ \hline
20 & 2.54 & 8.56 \\ \hline
30 & 2.69 & 8.37 \\ \hline
40 & 2.83 & 9.17 \\ \hline \end{tabular}
\end{table} 
Table 5: Damping force produced for Configuration A.  
Figure 23: Cyclic load for 2 mm diameter for Configuration B. (**a**) Load generated by 10 mm movement; (**b**) load generated by 20 mm movement; (**c**) load generated by 30 mm movement; (**d**) load generated by 40 mm movement. Figure 24: Cyclic load for 1 mm diameter for configuration B. (**a**) Load generated by 10 mm movement; (**b**) load generated by 20 mm movement; (**c**) load generated by 30 mm movement; (**d**) load generated by 40 mm movement. \begin{table}
\begin{tabular}{c c c c} \hline \multirow{2}{*}{**Movement of Piston Plate (mm)**} & \multicolumn{2}{c}{**Diameter (mm)**} \\ \cline{2-4}  & **2** & **1** & **Difference (\%)** \\ \cline{2-4}  & \multicolumn{4}{c}{**Force (kN)**} \\ \hline
10 & 21.96 & 24.56 & 11.84 \\
20 & 37.57 & 100.73 & 168.11 \\
30 & 79.82 & 127.83 & 60.15 \\
40 & 71.12 & 184.00 & 158.72 \\ \hline \end{tabular}
\end{table}