Dynamic response of reinforced soft tubes: A numerical and experimental investigation.

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Bibliographic Details
Title:	Dynamic response of reinforced soft tubes: A numerical and experimental investigation.
Authors:	Fu, Chen¹ (AUTHOR), Quan, Lingxiao¹ (AUTHOR), Geng, Yuheng¹ (AUTHOR), Gao, Jing¹ (AUTHOR), Guo, Changhong¹ (AUTHOR) guochanghong@ysu.edu.cn
Source:	Journal of Mechanical Science & Technology. Jul2025, Vol. 39 Issue 7, p3883-3896. 14p.
Subjects:	Civil engineering, Random vibration, Engineering models, Finite element method, Steel wire
Abstract:	Steel wire braiding reinforced polytetrafluoroethylene (PTFE) soft tubes are critical in aircraft piping systems, where their vibration and dynamic responses are essential for ensuring system reliability and safety. To investigate their dynamic performance, a high-precision finite element model was established combining material parameters from stress relaxation experiments. Modal and random vibration analyses were performed to determine the natural frequencies, stress, and velocity responses of the reinforced soft tubes. Thermal-mechanical coupling was also incorporated to simulate real operational conditions by considering ambient temperature effects. The results indicate that structural response is dominated by fundamental frequency resonance. As temperature increases, the natural frequency rises while the peak velocity response at the fundamental frequency decreases. The error between constrained mode frequencies and experimental values is below 5.44 %, validating the accuracy of model. These findings provide valuable insights for the design and analysis of reinforced soft tubes under dynamic loads. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Steel wire braiding reinforced polytetrafluoroethylene (PTFE) soft tubes are critical in aircraft piping systems, where their vibration and dynamic responses are essential for ensuring system reliability and safety. To investigate their dynamic performance, a high-precision finite element model was established combining material parameters from stress relaxation experiments. Modal and random vibration analyses were performed to determine the natural frequencies, stress, and velocity responses of the reinforced soft tubes. Thermal-mechanical coupling was also incorporated to simulate real operational conditions by considering ambient temperature effects. The results indicate that structural response is dominated by fundamental frequency resonance. As temperature increases, the natural frequency rises while the peak velocity response at the fundamental frequency decreases. The error between constrained mode frequencies and experimental values is below 5.44 %, validating the accuracy of model. These findings provide valuable insights for the design and analysis of reinforced soft tubes under dynamic loads. [ABSTRACT FROM AUTHOR]
ISSN:	1738494X
DOI:	10.1007/s12206-025-0612-8