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CSME 2024/02
Volume 45 No.1
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33-40
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Modal Analysis and Optimal Design of Spirally Corrugated Tubes
Chuang Pana, Yuan-De Daia and Qing-Qing Tanga
aSchool of Advanced Manufacturing, Nanchang University, Nanchang 330031, China
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Abstract:
Spirally corrugated tube is a cost-effective option for efficient heat exchange due to its simple manufacturing and two-way heat transfer enhancement. To ensure the tube bundle structure can withstand vibrations, spirally corrugated tubes with equal inner diameters were chosen for analysis. Numerical simulations were conducted for modal analysis, studying the impact of start value, pitch, and corrugated depth on vibration characteristics. Results show that as the number of starts increases, the natural frequency initially decreases then increases, and the first-order maximum amplitude decreases. As pitch increases, the natural frequency decreases and the first-order maximum amplitude increases, while increasing corrugated depth decreases both. In low-frequency environments, heat exchange tubes are prone to resonance, causing fatigue failure. Therefore, the first-order natural frequency is used as the target parameter to optimize the design of the multi-start spirally corrugated tubes, and the structural parameters with the best vibration resistance are obtained.
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Keywords: spirally corrugated tube, modal analysis, natural frequency, amplitude, orthogonal test.
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©
2024
CSME , ISSN 0257-9731
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