An airplane jig shape design method based on high fidelity aeroelastic simulation

Abstract

This paper develops a jig-shape design method for the elastic wing of the commercial aircraft with high aspect ratio. Two optimization steps are involved in the design method to optimize the jig shape of the elastic wing with the user-desired cruise aerodynamic performance. The real aeroelastic simulation becomes the fundamental of the design procedure. Structural mesh based CFD solver has been applied to simulate the transonic flow with high fidelity. Finite element based structural model of wing with complex configuration is constructed, and the flexibility matrix is evaluated to predict the deflection of the wing. The high-efficient mesh deformation technique and the data exchange interface between CFD and CSD are implemented, which improves the efficiency and accuracy of current approach. The jig shape design of a baseline commercial aircraft is presented, and the numerical simulation shows that the design method is strong enough to obtain the optimized jig shape efficiently.

Static Aeroelasticity Analysis of High Aspect Ratio Wing and the Jig-Shape Design Based on Multi-Block Structural Grid

“…A method of jig-shape design. The method of designing jig-shape calculates the original jig-shape and the deformation of static aeroelastic using the uncoupled method [1] . The method is based on correcting aerodynamic.…”

“…Generally, jig-shape is applied when manufacturing aircrafts. The design of military aircrafts mainly aims at jig-shape, while design of civil transport focuses on cruise shape [1] . With the application of high aspect ratio wings of large aero transports, the influence of structural static aeroelastic deformation must be taken into consideration [2,3,4] .…”

“…The jig-shape design can be considered as an inverse process of the static aeroelasticity analysis, and the accuracy of jig-shape correction has a great effect on the aerodynamic performance of aircraft in real flight condition. Nowadays, many scholars have done researches on this subject and make some progresses [1,3,4] .…”