A harmonic balance method for nonlinear fluid structure interaction problems. (May 2018)

• Record Type: Journal Article
• Authors: Yao, W.; Marques, S.
• Is Part Of: Computers & structures. Volume 201(2018)
• Page Start: 26
• Page End: 36
• Publication Date: 2018-05
• Subjects: Limit cycle oscillations -- Vortex-induced vibrations -- Aeroelasticity -- CFD -- Harmonic balance -- Nonlinear; Structural engineering -- Data processing -- Periodicals; Electronic data processing -- Structures, Theory of -- Periodicals; 624.171
• DOI: 10.1016/j.compstruc.2018.02.003
• Languages: English
• ISSNs: 0045-7949

Abstract

Highlights: The article reports an improved time-integrator for the Harmonic-Balance approach. The solver exploits an approximate time integrator. The method is demonstrated for limit-cycle oscillations and vortex-induced vibrations. Abstract: Over the past decade the Harmonic-Balance technique has been established as a viable alternative to direct time integration methods to predict periodic aeroelastic instabilities. This article reports the progress made in using a frequency updating procedure, based on a coupled fluid-structural solver using the Harmonic-Balance formulation. In particular, this paper presents an efficient implicit time-integrator that accelerates the convergence of the structural equations of motion to the final solution. To demonstrate the proposed approached, the paper includes a detailed investigation of the impact of input parameters and exercises the method for two types of fluid-structural nonlinear instabilities: transonic limit-cycle oscillations and vortex-induced vibrations.