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دوره 16، شماره 32 - ( 9-1399 )
جلد 16 شماره 32 صفحات 130-119 |
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Samaei S R, Ghodsi Hassanabad M, Asadian Ghahfarrokhi M, Ketabdari M J. Structural health monitoring of offshore structures using a modified modal strain energy method (Case study: four-leg jacket substructure of an offshore wind turbine). Marine Engineering 2020; 16 (32) :119-130
URL: http://marine-eng.ir/article-1-843-fa.html
URL: http://marine-eng.ir/article-1-843-fa.html
سمائی سیدرضا، قدسی حسن آباد مجید، اسدیان قهفرخی محمد، کتابداری محمدجواد. پایش سلامت سازه های دریایی به روش انرژی کرنشی مودال اصلاح شده (مطالعه موردی: زیرسازه شابلونی چهار پایه توربین بادی فراساحلی). مهندسی دریا. 1399; 16 (32) :119-130
1- گروه مهندسی عمران، دانشگاه علوم و تحقیقات، دانشگاه آزاد اسلامی پردیس بین الملل، قشم
2- گروه صنایع دریایی، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی
3- دانشکده مهندسی دریا، دانشگاه صنعتی امیرکبیر
2- گروه صنایع دریایی، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی
3- دانشکده مهندسی دریا، دانشگاه صنعتی امیرکبیر
چکیده: (3517 مشاهده)
سکوهای شابلونی چهارپایه از پرکاربردترین سازه‌های فراساحلی هستند که در طول عمر بهره‌برداری درمعرض آسیبهای مختلفی قرار می‌گیرند. برخلاف سازه‌های خشکی، این سازه‌ها دائماً در معرض برخورد امواج، خوردگی و آسیب اعضاء به ویژه در ناحیه پاشش آب هستند. در عمق‌های کم تا متوسط استفاده از این سازه توربینهای بادی فراساحلی رایج است. با سپری شدن عمر سرویس بسیاری از توربینهای بادی دریایی، پایش سلامت آنها ضرورت یافته است. در این تحقیق از روش انرژی کرنشی مودال اصلاح شده و در نظر گرفتن فرکانس‌های طبیعی برای تشخیص عیوب احتمالی اعضاء واقع در عرشه و ناحیه پاشش آب که بیش از سایر اعضا در معرض بارهای تناوبی امواج و خوردگی بالای آب دریا هستند، استفاده شده است. نتایج نشان می‌دهند، روش اصلاح شده دقت بالاتری در مکان‌یابی آسیب نسبت به روش اولیه (شاخص استابس) دارد. همچنین، آسیبهای تکی و چندگانه، با شدت کم و زیاد، توسط این روش با دقت مناسبی تعیین گردیدند.
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