Research on Parameterization Design Method of the Lug Structure for Civil Aircraft

Abstract

The lug/bolt type structure is widely used in modern civil aircraft structure design. The conventional forward design idea is that the structure design comes first and the strength analysis comes second,which has the problems of tedious iterations,long time consumption and error-prone human calculations. Taking reversal design as the guiding thought and aluminum alloy(7075-T6)lug as an example,a correlation equation among the classical load-bearing capacity,lug performance parameter and structure parameter of lug is established. By means of the design variables method,a set of parameterization design method is given.The visual program developed by MATLAB is used to solve the example. The results show that the parameterization design method can realize the automatic lug design guided by the demand and result mode,and the satisfied design results are obtained. The method can quickly solve the relevant parameters of the lug and greatly improve the design efficiency under the given load conditions and target requirements of lug.

Keywords

• lug structure
• aluminium alloy
• design variables
• parameterization
• automation design