کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6769815 1431681 2018 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Can a discrete dynamic model ever perfectly simulate a continuum?
ترجمه فارسی عنوان
آیا یک مدل پویا گسسته میتواند یک پیوسته را شبیه سازی کند؟
کلمات کلیدی
عناصر بی نهایت، عناصر محدود روش لایه نازک، مرزهای ارسال لایه های کاملا سازگار، الاستودینامیک، معادلات موج یک طرفه، اشتباهات معیوب پراکندگی عددی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
This article elaborates on the seemingly impossible notion that a continuous elastic body subjected to dynamic sources on its outer surface could ever be substituted in all of its essential qualities by a discrete model accomplished with finite elements. This topic is taken up herein and discussed in the context of a very simple two-dimensional model involving the propagation of SH shear waves (or acoustic waves) in a homogeneous elastic half-space. It is shown that there exists at least one discrete solid, referred to here as the Guddati Solid, which from its external surface behaves exactly like the continuum and is able to transmit waves of any frequency and any wavelength. This is a rather surprising finding in that it seems to contradict some well-known elastodynamic representation theorems, not to mention falsify the widespread belief that a discrete system can never behave like the continuum it purports to model. The purpose of this article is thus to present one example which disproves this widely believed postulate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Dynamics and Earthquake Engineering - Volume 112, September 2018, Pages 53-57
نویسندگان
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