Optimum Design Of Handing Composite Chimney Based On The Genetic Algorithm

The characters of composite material, including corrosion and fatigue resistant no more than high strength-to-weight and stiffness-to-weight ratios in turn entailing a high thrust-to-weight ratio for aircraft built predominantly of such materials, uniform in design and materials has lead to its application in the chimney liner, the cost of which can be reduced based on optimum design. The design optimization using a computer program that combines the finite element method and the genetic algorithm is aim to attain the best fiber orientation angles and stacking sequence. At present, there does not exit software including the program. The purpose of this paper is and the main works are as follows:1,The emphasis of the thesis is the finite element analysis using software ANSYS and optimum design with software MATLAB.2,Determining the analysis model with design variables objective function and constraint condition. The failure criterion in this thesis is maximum stress and maximum strain criterion. In the final, the objective function is transformed into fitness function with the penalty parameter.3,The fitness function is solved with ANSYS that can be transmitted to MATLAB producer of genetic algorithm.4,The genetic algorithm producer widely involved in design optimization of composite materials is coded in MATLAB. The optimization problem can be formulated as finding fiber orientation angles and stacking sequence to maximize the fitness function that compose of failure criterion and the critical bucking load factorλ.