بررسی ترموالاستیک یک پرتابگر الکترومغناطیس به کمک روش حجم محدود

نویسندگان

1 تربیت دبیر شهید رجایی

2 دانشکده مهندسی مکانیک دانشگاه تربیت دبیر شهید رجایی

چکیده

پرتابگر الکترومغناطیسی از انرژی الکتریکی برای تحریک سامانه و اعمال نیروی الکترومغناطیسی به پرتابه ‌استفاده می‌کند. جهت شبیه­سازی حرکت این نوع پرتابگرها نیاز است تا معادلات ماکسول در ریل و آرمیچر حل شوند. با توجه به شتاب بالا و سرعت کم آرمیچر در شروع حرکت، لازم است تا از یک شبکه غیریکنواخت در ابتدای ریل استفاده شود. تغییرات خواص فیزیکی ریل و آرمیچر با دما لحاظ گردیده‌ است. نتایج سرعت محاسبه شده در توافق خوبی با نتایج تجربی ارایه­شده در مقالات می‌باشد. کانتورهای میدان حکایت از آن دارد که سهم بالایی از جریان از لبه داخلی ریل و آرمیچر عبور می‌کند. نتایج توزیع دما نشان می‌دهد که بیشترین حرارت در بال­های آرمیچر و لبه داخلی ریل تولید می‌شود. اثر توزیع دما و نیروی مغناطیسی بر توزیع تنش حرارتی در ریل و آرمیچر مورد بررسی قرار گرفت و نشان داده شد که زمان وقوع بیشترین تنش حرارتی در ریل و آرمیچر متفاوت است.

کلیدواژه‌ها

عنوان مقاله [English]

Thermoelastic Analysis of an Electromagnetic Launcher Using Finite Volume Method

نویسندگان [English]

  • mostafa varmazyar 1
  • reza hamze loo 2
1 shahid rajaie
2 shahid rajaie
چکیده [English]

Electromagnetic launcher uses electrical energy to launch an armature. In order to simulate the movement of this type of launchers, it is necessary to solve the Maxwell equations in rails and armature. Due to the high acceleration and low speed of the armature at the start of the movement, it is necessary to apply the non-uniform meshes at the beginning of the rails. Changes in the physical properties of the rail and armature must be considered versus the temperature. The calculated results are in the agreement with the experimental velocity results reported in the previous study. The magnetic contours indicate that the high share of electrical current passes through the interior of the rails and the armature. The results of the temperature distribution show that the highest temperature is produced in the armature wings and the inner edge of the rails. The effect of temperature and magnetic force distribution on the thermal stress in rails and armature has been investigated and it has been shown that the moment of occurrence of the highest thermal stress in rails and armature is different.

کلیدواژه‌ها [English]

  • Electromagnetic Launcher
  • Rail and Armature
  • Temperature Distribution
  • Flexible Support
  • Thermoelastic Analysis

مراجع

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فایل ها

سابقه مقاله

  • تاریخ دریافت: 04 بهمن 1395
  • تاریخ بازنگری: 01 اسفند 1397
  • تاریخ پذیرش: 28 شهریور 1397
  • تاریخ انتشار: 01 تیر 1398

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