An Analytical Model for The Capacitance of Stainless Steel Braided Reinforced Teflon Aviation Hoses

Abstract

Stainless Steel Braided Reinforced Teflon Hose（SSBRTH), as an extensively used component in the aviation hydraulic system, has a huge impact on system performance. Because of its elasticity, the calculation of hose deformation and capacitance is difficult, and inappropriate hose parameters likely degrade the system and even affect the aircraft’s normal operation. In this study, the theory of corrugated plate is introduced for deformation prediction of fluctuant steel wire, then a new analytical model is established to describe the deformation condition of each regular braided SSBRTH layer with its capacitance calculation. In addition, the immediate establishment of SSBRTH 3D models by Rhino & Grasshopper parametric modeling for FEA is proposed and compared with the analytical model of capacitance, whose accuracies are all verified by experiments. The results emphasize that the actual deformation of the hose was in accordance with the prediction, and steel wire diameter, braided angle and the number of steel wires are negatively correlated with the capacitance value.