مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

تحلیل تجربی و عددی اثر سرما بر روی انتقال صوت از یک پوسته استوانه‌ای فولادی

نوع مقاله : مقاله پژوهشی

نویسندگان
میثم پرهیخته 1
امید محمدپور 2
رضا احمدی 2
مهدی کریمی 1
1 گروه مهندسی مکانیک، دانشگاه بوعلی سینا، همدان، ایران
2 گروه مهندسی مکانیک، دانشگاه پیام نور، تهران، ایران
10.48311/mme.2025.96877.0
چکیده
در این پژوهش، به بررسی تأثیر سرما بر میزان انتقال صوت در یک پوسته استوانه‌ای فولادی به دو روش تجربی و حل عددی پرداخته شده است. با کاهش دما، خواص مکانیکی پوسته از جمله مدول الاستیسیته تغییر می‌یابد که این امر بر رفتار ارتعاشی و در نتیجه میزان انتقال صوت از طریق پوسته تأثیر می‌گذارد. برای بررسی تجربی این مسأله، با استفاده از اتاق تست آکوستیک و با ارسال امواج آکوستیکی، سازه مذکور تحریک‌شده و میزان فشار صوت عبوری از این پوسته در دو دمای متفاوت 25 و 70- درجه سانتی­گراد اندازه گیری شده است. در بخش تحلیل عددی نیز، مدل‌سازی المان محدود پوسته استوانه‌ای در نرم‌افزار کامسول انجام شده و تحلیل ارتعاشی آکوستیکی بصورت عددی بر روی مدل در دو دمای مذکور صورت گرفته است. نتایج شبیه‌سازی عددی با نتایج آزمایشگاهی تطابق بسیار خوبی داشته و نشان داد که مدل عددی قادر به پیش‌بینی مناسب رفتار ارتعاشی صوتی پوسته در دماهای مختلف است. همچنین نتایج این پژوهش نشان دادند که دما به عنوان یک پارامتر مهم بر مکانیزم انتقال صوت در سازه‌های پوسته‌ استوانه ­ای تأثیرگذار بوده و با کاهش دما، سطح فشار صوت عبوری از پوسته کاهش می‌یابد.، لذا با درک دقیق این موضوع، می‌توان طراحی‌های بهینه‌تری برای کاهش صوت و ارتعاش چنین سازه­ هایی تحت اثر گرادیان دما در محیط ­های حرارتی انجام داد.
کلیدواژه‌ها
انتقال صوت
پوسته‌استوانه‌ای
تغییرات دما
کامسول
اتاق آکوستیک

موضوعات

عنوان مقاله English

Experimental and Numerical Analysis of the Effect of Cold on Sound Transmission from a Steel Cylindrical Shell

نویسندگان English

maisam parhikhteh 1
Omid Mohammadpour 2
Reza Ahmadi 2
Mahdi Karimi 1
1 Department of Mechanical Engineering, Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran
2 Mechanical Engineering Department, Payame Noor University ،Tehran, Iran
چکیده English

In this research, the effect of cold on the sound transmission rate in a steel cylindrical shell is examined through both experimental and numerical methods. As the temperature decreases, the mechanical properties of the shell, including the elastic modulus, change, which impacts the vibrational behavior and consequently the sound transmission through the shell. To investigate this issue experimentally, the structure was excited using an acoustic testing chamber where acoustic waves were sent, and the sound pressure level passing through the shell was measured at two different temperatures: 25°C and -70°C. In the numerical analysis section, finite element modeling of the cylindrical shell was conducted using COMSOL software, and the acoustic vibrational analysis was performed numerically on the model at the two specified temperatures. The results of the numerical simulation matched very well with the experimental results, indicating that the numerical model is capable of adequately predicting the acoustic vibrational behavior of the shell at different temperatures. Furthermore, the findings of this research demonstrated that temperature significantly influences the sound transmission mechanism in cylindrical shell structures, and as the temperature decreases, the sound pressure level passing through the shell decreases. Therefore, with a thorough understanding of this matter, it is possible to design more optimized solutions for reducing noise and vibrations in such structures under the effects of temperature gradients in thermal environments

کلیدواژه‌ها English

Sound Transmission, Cylindrical Shell, Temperature Variations, COMSOL, Acoustic Chamber
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مهندسی مکانیک مدرس
دوره 26، شماره 1
دی 1404
صفحه 53-63