کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
785809 1465371 2010 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The non-linear dynamic response of the Euler–Bernoulli beam with an arbitrary number of switching cracks
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
The non-linear dynamic response of the Euler–Bernoulli beam with an arbitrary number of switching cracks
چکیده انگلیسی

In this study the non-linear dynamic response of the Euler–Bernoulli beam in presence of multiple concentrated switching cracks (i.e. cracks that are either fully open or fully closed) is addressed. The overall behaviour of such a beam is non-linear due to the opening and closing of the cracks during the dynamic response; however, it can be regarded as a sequence of linear phases each of them characterised by different number and positions of the cracks in open state. In the paper the non-linear response of the beam with switching cracks is evaluated by determining the exact modal properties of the beam in each linear phase and evaluating the corresponding time history linear response through modal superposition analysis. Appropriate initial conditions at the instant of transition between two successive linear phases have been considered and an energy control has been enforced with the aim of establishing the minimum number of linear modes that must be taken into account in order to obtain accurate results. Some numerical applications are presented in order to illustrate the efficiency of the proposed approach for the evaluation of the non-linear dynamic response of beams with multiple switching cracks. In particular, the behaviour under different boundary conditions both for harmonic loading and free vibrations has been investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Non-Linear Mechanics - Volume 45, Issue 7, September 2010, Pages 714–726
نویسندگان
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