This paper present a new Optimization of Space Framed Rods Based on Genetic Algorithm and fully Stress Method, this method synthesize the orientation search ability of fully stress method and global search ability of Genetic Algorithm.

To obtain the optimal design of membrane structures satisfying the stress constraints, according to the full stress criterion and the assumption of statically determined system, the thickness of membrane structures with stress constraints is optimized.

According to the full stress criterion and the relation between stress and internal force of plate shell structures the iterative formula for the full stress design of plate shell structures was deduced.

A kind of optimal design of transmission tower by full stress principle combining with dynamical programing is praposed.

The paper introduces a three-dimensional elastic continuum topological optimization method with stress constraints: amendatory full stress method,namely,it makes every element of the three-dimensional elastic continuum in a full stress state through amending the element modulus of elasticity repeatedly,then deletes the elements that their modulus of elasticity is small.

Combined with GA,BP neural network is introduced into the optimization analysis of beam string structures and the imitated full-stress method for structures with discrete variables is amended to form a new type of combinational optimization method.

Combined with GA(genetic algorithm),BP neural network is introduced into the optimiza-tion design of beam string structures and the imitated full-stress method for structures with discrete variables is amended to form a new type of combinational optimization method.

In this paper we have integrated optimality criteria and satisfiability criteria of decision\|making into a uniform optimality criteria by using the methods in fuzzy set theory and, discussed in detail the decision\|making criteria when the information is insufficient and the evaluation is fuzzy.