Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Sizing optimization of truss structures under time-dependent constraints using the equivalent static loads method
Submission Author:
Rodrigo Bianchi Santos , RJ
Co-Authors:
Rodrigo Bianchi Santos, Anderson Pereira
Presenter: Rodrigo Bianchi Santos
doi://10.26678/ABCM.COBEM2017.COB17-2465
Abstract
It is well known that structural optimization problems subjected to transient loads is challenging in many aspects. First, because of the number of time-dependent constraints involved in the dynamic response optimization. Second, the evaluation of the sensitivities of these constraints is very expensive to store. In the literature, it is shown a lot of effort on the treatment of such several constraints. In most of cases a single equivalent functional constraint or the worst case is considered on computing the constraints. In this paper the Equivalent Static Load method (ESL) is considered to solve the dynamic structural response optimization problem. The ESL method transforms the original dynamic problem in a sequence of linear static optimization sub–problems. The use of such method is very interesting because it can be applied also in nonlinear dynamic optimization problems, avoiding the calculations of expensive sensitivities. The classical ten-member planar truss problem subjected to a transient load is solved in order to compare the responses in both traditional and ESL approach.
Keywords
equivalent static load, structural optimization, dynamic analysis
