Probabilistic Design and Random Optimization of Aerofoil Wing by Using Finite Element Method

摘要

This study represents simulatio n of aerofoil composite beam by using Monte Carlo method i.e.direct sampling. A three dimensional transient analysis of large displacement type has been carried out.Finite element analysis of NACA0012 aerofoil composite structure has been carried out and uncertainty in bending stress is analyzed. More over optimization of selected design variables has been carried out by using random optimization method. Bending stress was objective function.Chord length , elastic modulus of epoxy graphite, ply angle of aerofoil section, Beam length , moment of inertia and force are randomly varied within effective range and their effect on bending stress has been analyzed.In order to validate the results, one loop of simulation is benchmarked from results in literature. Ultimately, best set of optimized design variable is proposed to reduce bending stress under different loading condition