Multiobjective optimization of constrained layer damping treatments in composite plate structures

ABSTRACT

The optimal design of laminated composite panels with constrained layer damping (CLD) treatments is addressed in this article. The objectives are simultaneously to minimize weight and maximize modal damping. The design variables are the number and position of CLD patch treatments on the surface of the laminated plate. The problem is solved using Direct MultiSearch solver, which does not use any derivatives of the objective functions. A finite element model for sandwich plates with viscoelastic core and laminated face layers is used. Trade-off Pareto optimal fronts and the respective treatment configurations are obtained and the results are analyzed and discussed.

KEYWORDS:

• Constrained layer damping
• finite element method
• laminated composites
• multiobjective optimization
• viscoelastic material

Acknowledgments

This work is dedicated in honor of Professor Carlos Alberto Mota Soares on his 70th birthday and for his contribution and impact to research and education on Structural and Computational Mechanics. The authors also express their gratitude for his friendship and scientific advice.

Funding

The financial support of FCT, Fundação para a Ciência e Tecnologia, Portugal, through IDMEC, under LAETA project UID/EMS/50022/2013, is acknowledged.