unsteady motion
2.Many factors were considered in the algorithm such as the helicopter nonlinear flight dynamic model, the time delay of rotor wake, the air compressibility at advancing blade, the stall of retreating blade, the unsteady flapping motion of rotor blades and the aerodynamic interaction among rotor, fuselage, tail rotor and empennage.
4.The wing is modeled structurally by vibrational modes, which are used as amplitude of motion by a finite element analysis. Conservative full - potential equation and three dimensional unsteady Euler equation are used to compute the unsteady transonic flows around airfoil and wings under simple harmonic motion.
6.For obtaining the numeral solutions of round elastic plates in axisymmetrical deformation with varying-thickness in nonlinear deformation in the unsteady electromagnetic field and mechanical field, by establishing the equations of motion, the equations of distortion, the equations of Lorentz force, the equations of electronic dynamic mechenical, and adopting iterative method, we gained the nonlinear magneto-elastic calculation method and outcome of current-carrying shell, and gained the influencing degree toward mechanical parameter of varying thickness round ferreous plates in the electromagnetic field and mechanical field.
