Finite element studies of the electro impulse de-icing system

Abstract

In this study, analytically determined impulsive forces of an electro impulse de-icing (EIDI) system are used as input to a finite element model to predict the dynamic response of an airfoil coated with impact ice. By making use of the basic mechanical properties of impact ice and the test results on the EIDI system, a comparison is made between finite element calculations and measured displacements on an airfoil section. Experimental data were provided in the form of time-dependent displacements along both the transverse and lateral directions of the leading edge of an airfoil section. A finite element model of the EIDI system using MSC Nastran was developed with plate elements representing the aluminum skin of the test section and the accreted impact ice. Weightless stiff beam elements provided the shear connection between the ice and aluminum elements. Force-time history was input through eight nodes at the coil location.