Abstract
An effective deicing system is needed to be designed to conveniently remove ice from the surfaces of structures. In this paper, an ultrasonic deicing system for different configurations was estimated and verified based on finite element simulations. The research focused on deicing efficiency factor (DEF) discussions, prediction, and validations. Firstly, seven different configurations of Lead zirconate titanate (PZT) disk actuators with the same volume but different radius and thickness were adopted to conduct harmonic analysis. The effects of PZT shape on shear stresses and optimal frequencies were obtained. Simultaneously, the average shear stresses at the ice/substrate interface and total energy density needed for deicing were calculated. Then, a coefficient named deicing efficiency factor (DEF) was proposed to estimate deicing efficiency. Based on these results, the optimized configuration and deicing frequency are given. Furthermore, four different icing cases for the optimize configuration were studied to further verify the rationality of DEF. The effects of shear stress distributions on deicing efficiency were also analyzed. At same time, a cohesive zone model (CZM) was introduced to describe interface behavior of the plate and ice layer. Standard-explicit co-simulation was utilized to model the wave propagation and ice layer delamination process. Finally, the deicing experiments were carried out to validate the feasibility and correctness of the deicing system.
Highlights
Icing on the equipment is one of the problems needed to be solved in a cold region
The results indicated, for equal input power, the multitransient actuation method would increase deicing stresses compared to continuous excitation
Several nodes were selected as reference points to confirm optimal frequencies for each configuration
Summary
Icing on the equipment is one of the problems needed to be solved in a cold region. Ice buildup on the structures may cause many adverse effects, including cracking, stiffness degradation, malfunctions, and low performance on the structural components, which remarkably endangers their reliability.Icing problems are widely existing in aircraft [1,2], wind turbine blades [3,4], marine structures [5,6]etc. Ice buildup on the structures may cause many adverse effects, including cracking, stiffness degradation, malfunctions, and low performance on the structural components, which remarkably endangers their reliability. Icing problems are widely existing in aircraft [1,2], wind turbine blades [3,4], marine structures [5,6]. Based on the theory of wave propagation in a multilayered structure, Lamb waves and shear horizontal (SH) waves can generate stress and displacement at the interface of the structure. These stresses can be utilized to detach the ice layer. The Lamb wave has an advantage in deicing for large structures
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