Finite Element Analysis And Experimental Study For A Folding Wing Of Aircraft Missiles

Folding wing can meet the requirement of aircraft missiles' intelligent deformation. The structural parameters and expand characteristics directly impact the aerodynamic characteristics and ballistic trajectories of cruise missiles. Thus the analysis of folding wing structure and motion process is particularly important. Taking folding wings as the research object, the parts of structure and working principle were studied in this paper. The three-dimensional finite element model of wing was established. The static character, modal character and motion character of expand sector were analyzed. The static and expand tests were carried. The accuracy of model establishment and rationality of analysis method was testified.Firstly, the composition of the folding wing and the principle of different parts were studied. On the basis of its finite element model, the loading position was simulated and the static analysis was carried out, and then the stress field, displacement field and the strength of the wing was calculated; the natural frequency and modal shape were obtained by modal analysis of the folding wing.Using virtual prototyping technology on ADAMS platforms, motion character of the wing folding process was analysis and its movement was simulated, and the angular velocity, angular acceleration, opening time and other performance parameters of the active wing were calculated.The stress distribution, deformation patterns and the maximum carrying capacity were obtained under apply load and design load by carrying out the static test of the folding wing. Through the expending test of the folding wing, the opening time, the maximum cylinder pressure, angular velocity, acceleration velocity and other performance parameters were gotten.Finally, the improvement of folding wing structure and materials was proposed. The more reasonable option was determined, after analysis of the peak pressure and peak time of three different throttle aperture size of energy component actuating cylinder. On finite element static analysis of two composite material wings, the carbon fiber was used to design and manufac manufacture folding wings.The research of paper provided a reference for the organization and improvement of the folding wing design and manufacturing.