## 3 Results and Discussion  
### Verification for Experiment and FE Models  
The FE model was created with the Abaqus(r) education version. Extensive testing was done on different models to determine the best element size as shown in Table 3. The selected element size was 2 mm with 150,000 elements for stable outcomes. The FEA result in mode one and mode two was shown as a monotonic result when the element of the model was close to 150,000 elements and had an element size of 2 mm. The FEA results compared determinations with the research conducted by [PERSON] [43], [PERSON] et al. [37], and [PERSON] et al. [41] explicitly concerning the number of nodes and element size. The results were deemed unacceptable if the Figure 5 was too rough to show the structural system. Natural frequency was explained by vibrating uniformly sized elements with node distribution. FEA results were a vibrating convergence curve and could be effectively used for vibration analysis [44; 45]. This approach is consistent with studies providing insight into optimal element size for FE models. Figure 4: Signal analysis using frequency and time spectrum with FFT. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & \multicolumn{4}{c}{**Mode 1**} & \multicolumn{4}{c}{**Mode 2**} \\ \cline{2-7}
**Number of** & \multirow{2}{*}{**FEM**} & \multirow{2}{*}{**Exp.**} & **Research** & \multirow{2}{*}{**FEM**} & \multirow{2}{*}{**Exp.**} & **Research Article** \\
**Element** & & & & [36; 42] & & & [36; 42] \\ \hline
**16** & 5.1988 & \multirow{4}{*}{} & \multirow{4}{*}{} & 32.908 & \multirow{4}{*}{} & \multirow{4}{*}{} \\
**21** & 5.2578 & & & & 32.973 & \\
**907** & 5.2848 & & & & 33.106 & \\
**6045** & 5.286 & & & 34.415 & \\
**23,022** & 12.163 & & & 36.146 & \\
**28,523** & 12.457 & & & 36.868 & \\
**198,367** & 49.176 & & & 120.78 & \\
**267,062** & 50.1 & & & 121.26 & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: The national frequency in modes 1 and 2 of virgin steel for C3D8 type. The tetrahedral elements with mid-side nodes (C3D10M) were used to predict vibration elements in the modeling design. This design contained ten nodes per element and produced a consistent number of 16-267,062 elements compared to the previous case study. Research conducted by [PERSON] et al. [46] and [PERSON] et al. [29] found that the modeling design was comparable when using 23,022 elements with a 4 mm size element. The study results showed a 2.69% difference in mode 1 and mode 2, compared to the natural frequency value generated from the FE model. The virgin steel plate test results aligned with other research results in Table 4.  
The test results with the virgin steel workpiece and the frequency value from the FE model were similar when the number of elements was equal to 23,022. Figure 6 shows that the discourse value decreased with increased elements when adding the number of nodes, indicating a tracking behavior. To accurately predict the test piece's behavior, this research study employed tetrahedral elements with mid-side nodes (C3D10M) consisting of 198,367 elements. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \multicolumn{3}{c}{**Mode 1**} & \multicolumn{3}{c}{**Mode 2**} \\ \cline{2-7}
**Number of** **Element** & **FEM** & **Exp.** & **Research Article** & **FEM** & **Exp.** & **Research Article** [36,42] \\ \hline
**16** & 54.107 & & & 138.69 & & \\
**21** & 53.227 & & & 142.91 & & \\
**907** & 52.573 & & & 130.16 & & \\
**6045** & 52.298 & & & 128.48 & & \\
**23,022** & 52.163 & & & 128.04 & & \\
**28,523** & 52.156 & & & 128.02 & & \\
**198,367** & 52.149 & & & 127.98 & & \\
**267,062** & 52.144 & & & 127.95 & & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: The national frequency in modes 1 and 2 of virgin steel for C3D10M type. Figure 5: The convergence test on the finite element model for cubic element types: C3D8. The model used tetrahedral elements with mid-side nodes (C3D10M) for complex illustrations. They have ten nodes per element and are ideal for testing tracks. A recent study was found in [PERSON] et al.