Finite Element Analysis Of Bird Impact On Aircraft Shieldwindow

Along with aircraft getting higher and higher in the low-altitude flight speed, aircraft bird strike has become a serious threat to flight safety factors for instability; windshield is a very important part of the aircraft windshield bird impact study has beenan essential process of every country in the aircraft design process, so each country windshield bird strike study put considerable effort windshield bird impact design originally from the test method,However, by virtue of the traditional, the actual size of the experimental method, caused by the high cost of human consumption and consumption of financial problems; accompanied by the emergence and development of the computer, as well as the finite element theory put forward over the years and finite element technology maturity and perfection, as well asthe emergence of large-scale finite element software engineering practice, and gradually the experiment and numerical simulation method based on the finite element grid technology want to merge to deal with windshield bird impact design method; with the further improvement of the technology,than the finite element method is more suitable for processing windshield bird impact theory of numerical calculation, which is sph theory.The full text of more comprehensive summary of aircraft bird strike incidents, windshield bird strike problem characteristics are summarized and suitable bird impact analysis of the problem of the research methods, simple to fit the windshield bird strike analysis of theoretical issues are introduced, analyzed the different assumptions load windshield bird strike problem, the departure from the the rigid target load and a flexible target load, the response curves of these two types of load windshield; sph theory and implementation process; next, from the windshield and constitutive relation equation of the body of a bird, the summed windshield model of elastoplastic constitutive model equation of state and the body of a bird constitutive; finite element simulation model, and the model is solved.Finally, through comparative analysis, SPH in the state of deformation of the simulation birds tear is very much in line with the actual situation in the deformation of the fluid and therefore concludes SPH method than the Lagrangian method and arbitrary Euler Lagrange method appropriate to study the windshield bird strike such a large deformation theory.