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آشکارسازی خرابی در سازههای صفحهای با استفاده از تحلیل انرژی موجک | ||
| مدل سازی در مهندسی | ||
| مقاله 25، دوره 16، شماره 53، تیر 1397، صفحه 299-313 اصل مقاله (1.83 M) | ||
| نوع مقاله: کاربردی | ||
| شناسه دیجیتال (DOI): 10.22075/jme.2017.5623. | ||
| نویسندگان | ||
| امیر احمدنژاد زرنقی* ؛ امیر طریقت | ||
| دانشگاه تربیت دبیر شهید رجایی | ||
| تاریخ دریافت: 16 مرداد 1394، تاریخ بازنگری: 16 فروردین 1396، تاریخ پذیرش: 20 تیر 1396 | ||
| چکیده | ||
| به طور کلی پایش سلامت سازه ها برای تامین امنیت و یکپارچگی آنها بسیار مهم است. عاملی که این امنیت و یکپارچگی را تحت اثر خود قرار میدهد، شروع فرآیند ایجاد خرابی در سازهها است. لذا یافتن راهی برای آشکارسازی این خرابیها امر مهمی تلقی میگردد. در این مقاله، آشکارسازی خرابی برای سازههای صفحه ای شکل مانند عرشه پلها و دیوارها مورد بررسی قرار گرفته است. 9 شتابسنج برای مطالعه سیگنال های شتاب در نقاط مختلف سازه به کار گرفته شد. نهایتا با استفاده از انجام تحلیل انرژی موجک پیوسته، دو شاخص خرابی معرفی گردید. مهمترین مزیت روش به کار گرفته شده این است که با تعداد محدودی شتابسنج میتوان محدوده محل خرابی را تشخیص داد، در حالیکه نیازی به محاسبه اشکال مودی، اطلاع از مشخصات سازه و استفاده از تغییرمکانسنجهای گران قیمت نیست. | ||
| کلیدواژهها | ||
| پایش سلامت سازهای؛ آشکارسازی خرابی؛ سازههای صفحهای؛ شتابسنج؛ تحلیل انرژی موجک | ||
| عنوان مقاله [English] | ||
| Damage Localization in Plate-Like Structures Using Wavelet Energy Analysis | ||
| نویسندگان [English] | ||
| Amir Ahmadnejad Zarnaghi؛ Amir Tarighat | ||
| چکیده [English] | ||
| As a matter of fact, health monitoring of structures to ensure their safety and Integrity is very important. A factor that can endanger the safety and integrity is the process of occurrence of damage. Therefore, finding a way to identify damages is an essential issue. In this paper, damage localization of plate-like structures such as bridges and walls have been investigated. 9 virtual accelerometers have been placed in different locations of the structure to extract acceleration signals. Ultimately, two damage indices were introduced using continuous wavelet energy analysis. The most important advantage of the proposed method is that one can easily detect the approximate location of damage with a few number of accelerometers although there is no need to calculate mode shapes, obtain structural features of the structure and use expensive linear variable differential transformers (LVDTs). | ||
| کلیدواژهها [English] | ||
| Structural Health Monitoring, Damage Localization, Plate-Like Structures, Accelerometer, Wavelet Energy Analysis | ||
| مراجع | ||
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