Analysis Method of Assembly Deviation for Motion Mechanism of Movable Airfoil Based on Duplex Monte Carlo Methods
Sliding rails act as connecting components for relative motion of the movable airfoil,and the assembly quality directly affects the aerodynamic performance of the airfoil which is required to be under control with assembly deviation analyzed during the design process.The assembly clearances between the sliding rail and its track make the sliding rail float in the plane normal to the wing span direction.As a result,it is unable to determine the constraints of the assembly and directly solve for the assembly deviation.In this paper,an assembly deviation analysis method for the motion mechanism of the movable airfoil is proposed based on the duplex Monte Carlo method.Considering the manufacturing and assembling errors,the paper builds the geometric model of limit space and sliding rail.Deterministic assembly deviation distribution results can be obtained by solving the assembly schemes with non-deterministic constraints through statistical methods.Applying this analytical method,the assembly deviation calculation model of the leading-edge slat connecting mechanism is proposed and is calculated by Python simulation with the distribution normality and convergence of the results verified.The average value of floating assembly deviation is between two specific extreme deterministic locating schemes,so the constraining non-determinism of floating assembly and the validity of this analysis method are proved.The research could provide a technical support for movable airfoil assembly quality.
movable airfoilmotion mechanismassembly deviationnon-deterministic constraintsduplex Monte Carlo method
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