Modeling physical uncertainties in dynamic stall induced fluid-structure interaction of turbine blades using arbitrary polynomial chaos

被引：103

作者：

Witteveen, Jeroen A. S. ^{[1
]}

Sarkar, Sunetra ^{[1
]}

Bijl, Hester ^{[1
]}

机构：

[1] Delft Univ Technol, Fac Aerosp Engn, NL-2629 HS Delft, Netherlands

来源：

COMPUTERS & STRUCTURES | 2007年 / 85卷 / 11-14期

关键词：

dynamic stall; stall flutter; structural nonlinearity; uncertainty quantification; polynomial chaos expansion; arbitrary uncertainties;

D O I：

10.1016/j.compstruc.2007.01.004

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

A nonlinear dynamic problem of stall induced flutter oscillation subject to physical uncertainties is analyzed using arbitrary polynomial chaos. A single-degree-of-freedom stall flutter model with torsional oscillation is considered subject to nonlinear aerodynamic loads in the dynamic stall regime and nonlinear structural stiffness. The analysis of the deterministic aeroelastic response demonstrated that the problem is sensitive to variations in structural natural frequency and structural nonlinearity. The effect of uncertainties in these parameters is studied. Arbitrary polynomial chaos is employed in which appropriate expansion polynomials are constructed based on the statistical moments of the uncertain input. The arbitrary polynomial chaos results are compared with Monte Carlo simulations. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：866 / 878

页数：13

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