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Wednesday, July 10 • 17:30 - 17:50
STRUCTURAL OPTIMIZATION OF SEA SUBSYSTEMS BY ARRANGEMENT OF DAMPING MATERIAL

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A structural optimization method of subsystems to realize desired SEA parameters was proposed by the authors in the past studies. This method is based on a combination of SEA and FEM calculation, calculating repeatedly until satisfying the value of objective functions under arbitrary constraints. As a result of applying the proposed method to a simple structure consisting of two flat plates connected in an L shaped configuration, the design variable is taken as the thickness of the FEM element, a subsystem structure with the desired value of the CLF or power flow between subsystems for the one frequency band or multi frequency bands were constructed. However, it is difficult to adjust or process the thickness of the FEM element, so the optimization results is not realistic. In this paper, the method is also validated through numerical analyses, using a finite element method, of a flat plate and an L shaped plate, the subsystem is grouped into a plural elements, and each grouped element is set as a design variable, which should take a discrete value (in the form of either a damping rubber or original thickness), the total mass is taken as a constraint function in order to minimize the subsystem energy or CLF12 at one frequency band under each condition to realize utilization of this optimization method. As a result, in comparison with experimental data, numerical analysis results are qualitatively accurate.

Moderators
KK

kamal Kesour

PhD, Université de Sherbrooke

Authors

Wednesday July 10, 2019 17:30 - 17:50 EDT
St-Laurent 8

Attendees (6)