کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
754255 1462415 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimisation of the structural modes of automotive-type panels using line stiffeners and point masses to achieve weak acoustic radiation
ترجمه فارسی عنوان
بهینه سازی حالت های ساختاری پانل های خودرو با استفاده از سفت کننده های خط و توده های نقطه برای رسیدن به ضریب آکوستیک ضعیف
کلمات کلیدی
بهینه سازی سازه-آکوستیک، صفحات پانل های نوع خودرو، سفت کننده ها الگوریتم ژنتیک
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی

In this paper, an optimisation method is presented that turns the structural modes of an automotive-type panel into weak acoustic radiators. The advantage of the proposed method is that the optimum design does not depend upon a specific excitation mechanism. Hence, the optimised panel can be used in the early stages of vehicle product design when specific knowledge about the excitation forces is not available. In the proposed method the boundary conditions of the panel are specified such that the panel can be considered in isolation from the rest of the structure. The optimisation of the structural modes of the panel is then achieved by placing a number of constraint masses and stiffeners of optimum size and weight at optimum locations on the plate. Firstly, a theoretical model of a simply-supported plate is developed that takes into account the constraints at arbitrary positions and orientations. Then a genetic algorithm is used to minimise the sound power radiated by different modes on the plate by finding the optimum design for the constraints. Secondly, the use of added masses and stiffeners is then applied to a floor panel of a simplified model of a vehicle body structure in order to reduce the radiated sound. Predicted and experimental results of the radiated sound power from a reference flat panel and from various optimised panel designs are presented to illustrate the effectiveness of the optimised designs in reducing radiated sound from the structure. A combination of masses and stiffeners is shown to be an effective way of constructing weakly radiating structural modes on the panel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Acoustics - Volume 93, June 2015, Pages 23–37
نویسندگان
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