Patent ID: 9026406
Filing Date: 2015-05-05
Classification: B23P,G01L,G01M,G06F,Y10T

Abstract:
1. A computerized method for determining the strain induced at a selected point in a stiffened panel structure in response to a load, taking into account one or more out of plane (OOP) effects, said computerized method comprising the steps of: defining a model of a stiffened panel structure; determining using a processor an analysis point in said stiffened panel structure; selecting an input load for said stiffened panel; inputting data defining an out of plane (OOP) effect; modelling a plurality of said stiffened panel structures as a continuous beam and calculating the boundary conditions of a selected one of said stiffened panel structures within said continuous beam model in response to said input load and taking into account said OOP effect; modelling a single stiffened panel structure as a local beam model; calculating using the processor the strain at said analysis point in said local beam model taking into account said boundary conditions calculated from said continuous beam model and further taking into account said OOP effect; determining the load at which said calculated strain meets a strain allowable; and, calculating a reserve factor (RF) in respect of said analysis point as the ratio of said determined load to said input load.