Mechanics in Engineering ›› 2004, Vol. 26 ›› Issue (3): 0-0.doi: 10.6052/1000-0992-2003-358

• Education Study •    


Jianhua & strXing &   

  • Received:2003-08-22 Revised:2003-12-08 Online:2004-06-10 Published:2004-06-10

Abstract: The evolutionary structural optimization method has been under continuous development since 1992. Recently a bi-direction evolutionary structural optimization method is developed whereby material can be added and removed. In order to consider the effects of element removing or adding on structural stress constraints, in this paper, a new bi-direction evolutionary structural optimization method is proposed for structures under multiple loads. First, based on an idea that artificial material is added around optimal structural cavities and boundaries, a structural optimization model and a set of stress sensitivity formula are built. Then combining structural stresses and its sensitivities, a set of criteria, for adding and removing finite elements for the topology optimization problem of structures under multiple loads, is established, and a kind of new topology optimization procedure is obtained. Several simulation examples show that the proposed method is valid and effective for structural topology optimization.

Key words: mechanics, solid mechanics, structural optimization, topology optimization, man-made material