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<p>Cylindrical shells, widely used in various industries, are frequently subjected to diverse thermal loads that affect their vibrational and acoustic behavior. Consequently, evaluating the acoustic performance of these structures under varying temperatures is crucial. This study investigates the impact of temperature variations on sound transmission through cylindrical shells using a combined approach of experimental testing and numerical analysis. In the experimental phase, a steel cylindrical shell was fabricated and exposed to acoustic waves in an acoustic test chamber, where the transmitted sound pressure levels were measured at different temperatures (e.g., –70&#xa0;°C, 25&#xa0;°C, and 80&#xa0;°C). Concurrently, a finite element model of the cylindrical shell was developed using COMSOL Multiphysics, and vibro-acoustic analyses were conducted across these temperatures. The excellent agreement between experimental and numerical results validated the accuracy of the numerical model and the reliability of the experimental data. Findings indicate that temperature is a critical parameter: as temperature increases, natural frequencies decrease due to reduced stiffness, and the transmitted sound pressure level through the shell significantly rises, particularly observed at higher frequencies and temperatures (e.g., sound pressure levels were notably higher at 80&#xa0;°C compared to 25&#xa0;°C and –70&#xa0;°C). This precise understanding enables the design of optimized structures to mitigate sound and vibration under varying thermal conditions.</p>

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Experimental and numerical study on the effects of temperature variations on sound transmission through cylindrical shells

  • 期刊论文

  • 发表日期：

    2026年5月19日

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

摘要

Cylindrical shells, widely used in various industries, are frequently subjected to diverse thermal loads that affect their vibrational and acoustic behavior. Consequently, evaluating the acoustic performance of these structures under varying temperatures is crucial. This study investigates the impact of temperature variations on sound transmission through cylindrical shells using a combined approach of experimental testing and numerical analysis. In the experimental phase, a steel cylindrical shell was fabricated and exposed to acoustic waves in an acoustic test chamber, where the transmitted sound pressure levels were measured at different temperatures (e.g., –70 °C, 25 °C, and 80 °C). Concurrently, a finite element model of the cylindrical shell was developed using COMSOL Multiphysics, and vibro-acoustic analyses were conducted across these temperatures. The excellent agreement between experimental and numerical results validated the accuracy of the numerical model and the reliability of the experimental data. Findings indicate that temperature is a critical parameter: as temperature increases, natural frequencies decrease due to reduced stiffness, and the transmitted sound pressure level through the shell significantly rises, particularly observed at higher frequencies and temperatures (e.g., sound pressure levels were notably higher at 80 °C compared to 25 °C and –70 °C). This precise understanding enables the design of optimized structures to mitigate sound and vibration under varying thermal conditions.