کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
794550 902495 2007 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Identification of limit cycles for piecewise nonlinear aeroelastic systems
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Identification of limit cycles for piecewise nonlinear aeroelastic systems
چکیده انگلیسی

This paper describes two methods for the analysis of aeroelastic systems with complex piecewise nonlinear structural stiffness. These methods are tested and compared for low speed incompressible and transonic flows. The first technique employed in this paper uses a new application of the analytical solution of linear algebraic systems, the second technique utilises logarithmic and tanh functions to both represent discrete nonlinearities and to act as a switch between different nonlinear areas. The transonic aerodynamic models used are generated using an eigenvalue realisation algorithm (ERA) which produces reduced order models (ROMs) from the pulse responses of time linearised Euler simulations. It is shown that such aerodynamic models are well suited to use with continuation methods. Flutter boundaries and limit cycle oscillations can then be rapidly identified with good accuracy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 23, Issue 7, October 2007, Pages 1012–1028
نویسندگان
, , ,