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<p>Cylindrical shells are vital structural components across industries, yet the influence of temperature variations on their dynamic behavior remains underexplored, necessitating combined experimental and numerical studies. This study aims to examine the effect of temperature changes, ranging from − 70&#xa0;°C to 80&#xa0;°C, on the natural frequencies and vibration modes of steel cylindrical shells. Non-contact experimental methods, including acoustic excitation via loudspeaker and modal hammer testing, are employed to measure natural frequencies of a steel cylindrical shell at ambient and extreme temperatures. Finite element modeling in COMSOL is performed concurrently to simulate the dynamic behavior, incorporating temperature-dependent material properties to validate experimental findings. This research confirms that temperature significantly alters the dynamic behavior of cylindrical shells, and accurate finite element models can predict these effects with acceptable precision, providing a cost-effective strategy for designing temperature-resilient structures.</p>

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Experimental and numerical evaluation of temperature-dependent natural frequencies in cylindrical shells using acoustic excitation

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Maisam Parhikhteh,
  • Mahdi Karimi,
  • Reza Ahmadi,
  • Omid Mohammadpour

摘要

Cylindrical shells are vital structural components across industries, yet the influence of temperature variations on their dynamic behavior remains underexplored, necessitating combined experimental and numerical studies. This study aims to examine the effect of temperature changes, ranging from − 70 °C to 80 °C, on the natural frequencies and vibration modes of steel cylindrical shells. Non-contact experimental methods, including acoustic excitation via loudspeaker and modal hammer testing, are employed to measure natural frequencies of a steel cylindrical shell at ambient and extreme temperatures. Finite element modeling in COMSOL is performed concurrently to simulate the dynamic behavior, incorporating temperature-dependent material properties to validate experimental findings. This research confirms that temperature significantly alters the dynamic behavior of cylindrical shells, and accurate finite element models can predict these effects with acceptable precision, providing a cost-effective strategy for designing temperature-resilient structures.