# Evaluation of Mechanical Performance of a New Disc Spring-Cable Counter Pressure Shock Absorber
## 5 Conclusions  
1. A new vertical disc spring-cable counter pressure (DSCCP) shock absorber was proposed and validated, which has a function such that the disc spring group is always in a compression working state and causes energy dissipation, regardless of whether it is in tension or compression motion.
2. The friction coefficients between disc springs, and between the disc spring and cover plate, are suggested to be 0.005 and 0.3, respectively, to achieve the best agreement between numerical and theoretical results for the mechanical performance of the DSCCP shock absorber. For example, the errors of the flattening force of the DSCCP shock absorber between simulation and theory are only 4.58% under linear static loading, and 4.14% under sin-function static loading.
3. Under static loading, the bearing capacity of the DSCCP shock absorber shows a linear relationship with the loading displacement. The static compression and tensile results show consistent agreement with theory, simulation and experiment. Under the condition of ultimate tensile deformation, the errors between the experimental results and the theoretical and numerical results are only 4.47% and 6.56%, respectively.
4. Under dynamic loading, the bearing capacity of the DSCCP shock absorber first shows a trend of slow growth, then rapid growth with the increase of loading displacement. The energy dissipation capacity of the shock absorber shows an increase with the  
Figure 17: Influence of loading amplitude on equivalent stiffness and damping ratio.  
Figure 18: Force–deformation relationship curves in different loading amplitudes.  
increase of loading displacement. The minimum equivalent damping ratio of all the dynamic test cases is 7% (case 3), and the maximum is up to 15.3% (case 9).
* Under the same pre-compression deformation conditions, the equivalent stiffness and equivalent damping ratio of the shock absorber slowly decrease with the loading frequency, with a maximum decrease of only 2.59%. Under the same loading frequency, the equivalent stiffness and equivalent damping ratio of the shock absorber exhibit a linear and significantly increasing trend with pre-compression deformation. Under the same loading frequency and pre-compression deformation conditions, the equivalent stiffness of the shock absorber decreases continuously with the increase of loading frequency, but the equivalent damping ratio increases continuously with the loading frequency.  
Conceptualization, Y.W.; methodology, X.W.; investigation, S.J.; data curation, X.W. and S.J.; writing--original draft preparation, Y.W. and F.X.; writing--review and editing, D.W.; supervision, X.W.; project administration, F.X. and D.W. All authors have read and agreed to the published version of the manuscript.  
This project is supported by the National Natural Science Foundation of China (52178467), and the Science and Technology Program of Guangzhou (202235058), Technology Project of China Southern Power Grid (037700 KK52220039), which are gratefully acknowledged.  
Not applicable.  
Data Availability Statement: Data are available upon request.  
The authors declare no conflict of interest.