Structural optimization of thin-walled tubular trusses using a virtual strain energy density approach

摘要: The present paper deals with the weight minimization of tubular trusses subjected to multiple loads under size, stress and buckling constraints. applied optimization procedure is based on a virtual strain energy density approach developed by first two authors, already tested in plane space truss structures. key point method activation at least one imposed displacement In case where such limitations are absent, dummy constraint introduced instead, which iteratively sustains corrections until convergence achieved within desirable tolerance. efficiency practicability proposed was typical cases For reasons comparison, same were also optimized using Sequential Quadratic Programming (SQP), powerful mathematical programming method. results revealed that performs very well terms convergence, required number iterations optimum tracing, while value has insignificant effect procedure.