# Mechanical Behaviors and Numerical Simulation Analysis of a New Isolation System
## 4 Conclusions  
This article introduces a new type of isolation system that takes into account the potential impact of parameters, such as the number of spheres, on the friction coefficient. Based on this, numerical simulations were conducted for both the base isolation structure and traditional seismic-resistant structures under earthquake excitation to determine their dynamic characteristics.  
Firstly, in the experimental test data, we found that the number of spheres and pads has a certain influence on the friction coefficient. Without spheres, the minimum friction coefficient occurs when the horizontal velocity is 5 mm/s and the vertical pressure is 204 KN. With the involvement of spheres, there is little difference in the friction coefficient range between five and four spheres. In addition, the minimum friction coefficient appears in the bearing ratio of 25-50%, indicating that the number of spheres and pads can reduce the friction coefficient within a certain range. These results indicate that the number of spheres and pads is an important factor affecting the friction coefficient of the isolation system.  
Secondly, after conducting numerical simulations for the base isolation structure and traditional seismic-resistant structures under earthquake excitation, we found that the new composite isolation system can effectively reduce the dynamic response of the model compared to traditional seismic-resistant structures. This indicates that the new isolation system has good seismic performance.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Friction Coefficient**} & \multirow{2}{*}{**X Acceleration/gal**} & \multirow{2}{*}{**Floor**} & \multicolumn{4}{c}{**Inter-Story/mm**} \\ \cline{3-6}  & & & **El Centro** & **Kobe** & **Shanghai Wave** \\ \hline \multirow{6}{*}{0.04} & & isolated & 27.4 & 34.1 & 56.4 \\  & & 1 & 15.1 & 18.4 & 33.9 \\  & 200 & 2 & 12.4 & 15.3 & 26.9 \\  & & 3 & 10.4 & 13.2 & 21.5 \\  & & 4 & 9.1 & 11 & 16.8 \\ \cline{2-6}  & & isolated & 98.1 & 118.1 & 153.7 \\  & & 1 & 50.2 & 55.6 & 63.8 \\  & 400 & 2 & 32.8 & 42 & 49.6 \\  & & 3 & 25.4 & 31.8 & 39.2 \\  & & 4 & 16.2 & 18.3 & 21.8 \\ \hline \multirow{6}{*}{0.05} & & isolated & 25.3 & 31.4 & 57.2 \\  & & 1 & 16.1 & 20.2 & 35.4 \\ \cline{1-1}  & 200 & 2 & 11.8 & 15.9 & 28.6 \\ \cline{1-1}  & & 3 & 10.4 & 14.1 & 23.7 \\ \cline{1-1}  & & 4 & 9.3 & 12.8 & 17.2 \\ \cline{1-1} \cline{2-6}  & & isolated & 90.2 & 109.4 & 149.5 \\ \cline{1-1}  & & 1 & 45.6 & 57.9 & 68.6 \\ \cline{1-1}  & 400 & 2 & 36.2 & 42.3 & 48.4 \\ \cline{1-1}  & & 3 & 27.5 & 34.5 & 36.2 \\ \cline{1-1}  & & 4 & 18.4 & 20.6 & 21.8 \\ \hline \hline \end{tabular}
\end{table}
Table 2: Comparison of displacement of seismically isolated structures under different seismic waves.  
Finally, it should be pointed out that this experiment mainly studied the influence of parameters such as the number of balls on the friction coefficient of the isolation support. However, in order to better apply the new isolation support in practical engineering, we still need to further study the shear performance of the isolation support using ABAQUS finite element software and explore its applicability under different parameter conditions. These research results will help provide a theoretical basis for the practical application of the new isolation support.  
Conceptualization, B.L. and D.P.; validation, B.L.; formal analysis, B.L.; investigation, B.L.; resources, B.L.; data curation, W.Z.; writing--original draft preparation and writing, W.Z.; review and editing, D.P.; visualization, Y.L.; supervision, G.N.; project administration, G.N.; funding acquisition, B.L. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
The data can be obtained from the author by contacting them at [EMAIL_ADDRESS].  
We extend our appreciation to all individuals who participated in this study and provided us with their time and cooperation.  
The authors declare no conflict of interest.