## 5 Conclusions  
In this paper, based on the identification of damping parameters of Fe-12 Cr-3 Al alloy materials, dynamic characteristic calculations and experimental tests have been carried  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Parts**} & \multirow{2}{*}{**Materials**} & \multicolumn{3}{c}{**Excitation Amplitude**} \\ \cline{3-5}  & & **1 g** & **2 g** & **3 g** \\ \hline \multirow{2}{*}{Base} & Carbon steel & 0.9704 & 1.94 & 2.91 \\  & High damping alloy & 0.954 & 1.293 & 2.864 \\ \hline \multirow{2}{*}{Mounting Structure} & Carbon steel & 0.9264 & 1.849 & 2.772 \\  & High damping alloy & 0.9238 & 1.252 & 2.772 \\ \hline \multirow{2}{*}{Mass Block} & Carbon steel & 0.1972 & 0.3994 & 0.6047 \\  & High damping alloy & 0.09775 & 0.1376 & 0.3611 \\ \hline \multirow{2}{*}{Transmission Rate} & Carbon steel & 0.203 & 0.206 & 0.208 \\  & High damping alloy & 0.102 & 0.159 & 0.126 \\ \hline \multicolumn{5}{c}{Reduction Rate} & 49.8\% & 22.8\% & 39.4\% \\ \hline \hline \end{tabular}
\end{table}
Table 7: The fixed frequency test results of the mounting structure.  
Figure 21: The comparison of test results (**a**) Response amplitude at the mass block measurement point, (**b**) Vibration transmission rate.  
out on the high damping alloy mounting structures and carbon steel mounting structures. Comprehensive finite element calculation results and swept frequency test results show that, in the frequency range of 0-1500 Hz, the modal frequency of the high damping alloy material mounting structure is slightly reduced compared to that of the carbon steel material mounting structure. The response amplitude corresponding to the different order is significantly reduced, and the amplitude reduction rate is about 30%. The fixed frequency test results show that the vibration transmission rate of the high damping alloy mounting structure can be reduced by 40% compared with the carbon steel mounting structure. At the same time, the experimental results verify the reasonableness of the finite element calculation, and the selected high damping alloy material applied to the mounting structure has a better vibration reduction effect, which can provide a reference for the application of high damping alloy material to the vibration reduction design of the mounting structure of aero-engines.  
Conceptualization, J.L. and W.L.; Methodology, H.Z. and Q.H.; Software, H.C.; Formal analysis, H.Z. and Q.H.; Resources, J.L. and W.L.; Data curation, H.C.; Writing--original draft, H.Z.; Writing--review & editing, J.L., H.C. and Y.Z.; Supervision, H.M. and Q.H.; Project administration, J.L. and H.M.; Funding acquisition, J.L., W.L. and Q.H. All authors have read and agreed to the published version of the manuscript.  
This research was funded by National Key Research and Development Program of China grant number 2023 YFC2907205, National Science and Technology Major Project of China grant number J2019-1-0008-0008 and J2019-IV-0002-0069, The Fundamental Research Funds for the Central Universities under Grant grant number N2303016, Science and Technology Plan Project of Liaoning Province Grant grant number 2022 JH1/10800057.  
Not applicable.  
The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.  
Author [PERSON] was employed by the Shenyang Academy of Instrumentation Science Co., Ltd. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.