Ali Nouri
Department of Aerospace Engineering, Shahid Sattari Air University, Tehran, Tehran
[ 1 ] - A comparison between modal damping ratios identified by NExT-ERA and frequency domain impact test
In this research, the modal parameters of a beam in free-free condition are extracted by performing different experiments in laboratory. For this purpose, two different techniques are employed. The first methodology is considered as a time domain method in Operational Modal Analysis. While the other one is frequency domain impact hammer test which is categorized as an Experimental Modal Analysi...
[ 2 ] - بهینه سازی افت تراگسیل صدا در یک ورق مدرج تابعی با طول متناهی با استفاده از الگوریتم ژنتیک چند هدفه
در این مقاله، بهینه‌سازی افت تراگسیل صدای ورق‌های مدرج تابعی با طول متناهی با استفاده از الگوریتم ژنیتک چند هدفه مورد مطالعه قرار گرفته است. هدف اصلی این مقاله، شناسایی و بهینه نمودن پارامترهای مؤثر بر روی تراگسیل توان صوتی این سازه‌ها می‌باشد. در این راستا، ابتدا معادلات دینامیکی ورق، با استفاده از نظریه کلاسیک صفحات نازک به دست آمده؛ سپس، معادلات حاکم بر انتشار موج با توجه به نظریه راسس استخر...
[ 3 ] - تحلیل ارتعاشی و کمانشی پوسته‌های استوانه‌ای تقویت شده طولی با شرایط مرزی مختلف تحت بار محوری استاتیکی
This article has no abstract.
[ 4 ] - Nonlinear Vibration Analysis of Piezoelectric Functionally Graded Porous Timoshenko Beams
In this paper, nonlinear vibration analysis of functionally graded piezoelectric (FGP) beam with porosities material is investigated based on the Timoshenko beam theory. Material properties of FG porous beam are described according to the rule of mixture which modified to approximate material properties with porosity phases. The Ritz method is used to obtain the governing equation which is then...
[ 5 ] - A Comparison Study on Various Finite Element Models of Riveted Lap Joint by the Use of Dynamic Model Updating
Till now, various models have been proposed in literature to simulate the behavior of riveted structures. In order to find the most accurate analytical method in modeling the dynamic behavior of riveted structures, a comparison study is performed on several of these models, in this research. For this purpose, experimental modal analysis tests are conducted on a riveted plate to verify the effic...
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