New exploration on type-selection optimal design for the truss structures

Considering the complication in type-selection optimal design for truss structures, a practical method based on topology group concept is presented. Number of possible topology groups are determined firstly via a binary algorithm. In order to decrease re-analysis, the analysis of statical determination as well as node examination and rigid body movement examination is executed for obtaining the so-called meaningful topology groups. Finally, the process of sectional area optimization acquires the best structural type. Numerical examples show that our method is practical, simple and reliable.