مروری بر تحلیل دینامیکی و مدل‌سازی عددی گسل‌ها با استفاده از روش اجزای مرزی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی ژئوتکنیک، گروه مهندسی عمران، دانشگاه رازی، کرمانشاه، ایران

2 استادیار، گروه مهندسی عمران، دانشگاه رازی، کرمانشاه، ایران

3 استاد، گروه مهندسی ژئوتکنیک لرزه‌ای، پژوهشگاه بین‌المللی زلزله‌شناسی و مهندسی زلزله، تهران، ایران

چکیده

یکی از روش ­های عددی در مکانیک محیط­ های پیوسته، روش المان مرزی (BEM) است. در این روش معادلات دیفرانسیلی حاکم به معادلات انتگرالی تبدیل و روی مرز مسئله اعمال خواهند شد. سپس مرز به قطعات مرزی تقسیم می­ شود و انتگرال­گیری عددی بر روی المان­ های مرزی انجام می­ شود که از حل آن می توان به جواب یکتای مسئله رسید. روش المان مرزی را می­ توان به‌راحتی بر روی مرز­های با هندسه پیچیده به کار برد. روش المان مرزی یا معادله انتگرال مرزی (BIEM)  یکی از روش‌های مدل‌سازی عددی است که کاربرد زیادی در شبیه ­سازی عددی دینامیک گسل­ ها دارد؛ نتایج آن دید وسیعی از فیزیک گسیختگی زلزله فراهم می­ کند. در این مقاله به‌مرور مدل‌سازی عددی گسل به روش المان مرزی پرداخته شده، و مطالعات انجام شده در زمینه مدل‌سازی عددی گسل به روش المان مرزی مورد بررسی قرار گرفته­ است. در نهایت نتایج به‌دست‌آمده به این‌گونه است که روش المان مرزی برای مسائل دارای مرزهای پیچیده همانند هندسه گسل و مسائل با مرز­های بی­کران مناسب است. همچنین می ­توان با استفاده از مدل‌سازی عددی به روش المان مرزی، لغزش رخ داده روی گسل و تغییر شکل­ های سطحی را به‌خوبی پیش ­بینی کرد.

کلیدواژه‌ها

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  • تاریخ دریافت: 25 فروردین 1399
  • تاریخ بازنگری: 02 تیر 1399
  • تاریخ پذیرش: 15 بهمن 1399

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