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  4. Vol 11, Issue 2, 2026

Theoretical Analysis on Large-Stroke Dry Friction Vibration and Shock Isolation Composite Structure for Satellite Launch Environment

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DOI: 10.23977/jemm.2026.110203 | Downloads: 0 | Views: 45

Author(s)

Guan Wang 1, Houde Dong 1, Dike Hu 2, Guyue Jiao 1

Affiliation(s)

1 School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, China
2 Shanghai Aerospace System Engineering Institute, Shanghai, China

Corresponding Author

Guyue Jiao

ABSTRACT

This paper focuses on the theoretical research of dry friction vibration isolation suitable for satellite launch dynamic environment, aiming to coordinate vibration isolation and shock buffering performance under large-stroke working conditions. Based on equivalent vibration theory, a dry friction damping model is established, and the inherent resonance-free mechanism of the isolation system is analyzed theoretically. Dry friction exhibits frequency-dependent damping characteristics, which satisfy the broadband and large-stroke dynamic demands of satellite launch equipment. The resonance-free mechanism is explored to address low-frequency resonance amplification of traditional isolators, and a nonlinear composite structure with high–low friction zones is designed to adapt to both micro-vibration and strong impact conditions. For large-stroke impact responses, direct friction calculation rather than equivalent linear damping is adopted, and Duhamel's integral is used to solve transient dynamic responses. Numerical verification shows that the peak response occurs in the residual vibration stage, and dry friction continuously dissipates vibration energy. This study provides theoretical support for the design and application of the proposed composite structure for satellite launch scenarios.

KEYWORDS

Dry friction, vibration isolation, impact load, nonlinear damping, mechanical model

CITE THIS PAPER

Guan Wang, Houde Dong, Dike Hu, Guyue Jiao. Theoretical Analysis on Large-Stroke Dry Friction Vibration and Shock Isolation Composite Structure for Satellite Launch Environment. Journal of Engineering Mechanics and Machinery (2026). Vol. 11, No. 2, 22-33. DOI: http://dx.doi.org/10.23977/jemm.2026.110203.

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