پایان نامه شناسایی ضرایب سختی و میرایی تکیه گاه تیر طره ای

فهرست:

1- فصل اول: مقدمه. 2

1-1- اهمیت موضوع. 2

1-2- هدف از انجام این پایان‌نامه و مراحل انجام آن.. 5

2- فصل دوم: مروری بر مطالعات پیشین.. 8

2-1- مقدمه. 8

2-2-تاریخچه ارتعاشات تیرها 8

2-3-تاریخچه تحلیل معکوس.... 9

2-3-1-شناسایی معکوس بارهای ضربهای.. 10

2-3-2-شناسایی معکوس ثابتهای مواد. 11

2-3-3-مسائل شناسایی ترک و عیوب... 11

2-4-تاریخچه کاربرد فنرها و دمپرها 12

3- فصل سوم: مبانی تئوری.. 17

3-1- مقدمه. 17

3-2-روند کلی حل یک مسأله معکوس.... 18

3-2-1-تعریف مسأله. 20

3-2-2-ارائه مدل مستقیم.. 20

3-2-3-محاسبه حساسیت بین خروجیها و پارامترها 20

3-2-4-طراحی آزمایش.... 21

3-2-5-کمینه کردن خطای اندازهگیری.. 21

3-2-6-بکارگیری فرمولبندی معکوس.... 21

3-2-7-بازبینی پاسخ.. 22

3-3-مفاهیم اساسی مسائل معکوس.... 22

3-4-فرمولبندی معکوس.... 28

3-5-انتخاب خروجیها 30

3-6-هموارسازی برای مسائل بدنهاده 31

3-7- روشهای بهینهسازی.. 33

3-7-1- روشهای جستجوی مستقیم.. 36

3-7-2- روشهای جستجو بر پایه گرادیان.. 37

3-7-3-روش غیرخطی حداقل مربعات... 37

3-7-4-روشهای پیدا کردن ریشه. 38

3-7-5-الگوریتمهای ژنتیک.... 38

3-7-6-نکاتی در خصوص روشهای بهینهسازی.. 39

4- فصل چهارم: نحوه انجام تحقیق.. Error! Bookmark not defined.

4-1-مقدمه. Error! Bookmark not defined.

4-2-تشریح مدل پیشنهادی.. Error! Bookmark not defined.

4-3- فرمولبندی تحلیل معکوس.... Error! Bookmark not defined.

4-3-1-محاسبه ماتریس حساسیت... Error! Bookmark not defined.

4-3-2-شبیهسازی دادههای اندازهگیری.. Error! Bookmark not defined.

4-3-3-انجام محاسبات در نرم افزار Error! Bookmark not defined.

4-5- بررسی تأثیر پارامترهای مختلف بر پاسخ زمانمند تیرطرهای.. Error! Bookmark not defined.

4-5-1-بررسی تأثیر بازه اعمال نیرو بر پاسخ تیر طرهای.. Error! Bookmark not defined.

4-5-2-بررسی تأثیر ضریب سفتی بر پاسخ تیر طرهای.. Error! Bookmark not defined.

4-5-3-بررسی تأثیر ضریب میرایی بر پاسخ تیر طرهای.. Error! Bookmark not defined.

5- فصل پنجم: مثالهای عددی.. Error! Bookmark not defined.

5-1-مقدمه. Error! Bookmark not defined.

5-2-بررسی تیر یک سر درگیر (تیر طرهای) Error! Bookmark not defined.

5-2-1-بررسی تأثیر خطای اندازهگیری بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-2-بررسی روند همگرایی پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-3-بررسی تأثیر محل قرارگیری حسگر بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-4-بررسی تأثیر تعداد دادههای اندازهگیری بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-5-بررسی تأثیر تعداد حسگر بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-6-بررسی تأثیر مقدار حدس اولیه بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-7-بررسی تأثیر زمان اعمال نیرو بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-8-بررسی تأثیر اختلاف زمانی بر پاسخ تیر طرهای.. Error! Bookmark not defined.

5-2-9-بررسی تأثیر زمان دادهبرداری بر پاسخ معکوس در تیر طرهای بدون در نظر گرفتن اختلاف زمانی  Error! Bookmark not defined.

5-2-10-بررسی تأثیر زمان دادهبرداری بر پاسخ معکوس در تیر طرهای با در نظر گرفتن اختلاف زمانی  Error! Bookmark not defined.

5-2-11-بررسی تأثیر محل اعمال نیرو بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-12-بررسی تأثیر مقدار ضریب میرایی بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-2-13-بررسی تأثیر مقدار ضریب سفتی بر پاسخ معکوس در تیر طرهای.. Error! Bookmark not defined.

5-3-بررسی تیر دو سر درگیر. Error! Bookmark not defined.

5-3-1-بررسی تأثیر خطای اندازهگیری بر پاسخ معکوس در تیر دو سر درگیر. Error! Bookmark not defined.

5-3-2-بررسی تأثیر تعداد دادههای اندازهگیری بر پاسخ معکوس در تیر دو سر درگیر. Error! Bookmark not defined.

5-3-3-بررسی تأثیر تعداد حسگرها بر پاسخ معکوس در تیر دو سر درگیر. Error! Bookmark not defined.

6- فصل ششم: نتیجه گیری و پیشنهادات... Error! Bookmark not defined.

6-1-مقدمه. Error! Bookmark not defined.

6-2-نتیجهگیری.. Error! Bookmark not defined.

6-3-پیشنهادات... Error! Bookmark not defined.

مراجع و منابع.. 42

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