Abstract
Some equipment have low efficiencies and safety when their surfaces are covered with ice, such as wind turbine and airplane, so de-bonding ice on such kind of equipment surface is necessary. In this article, the ultrasonic de-icing method based on icing aluminum plate is researched by finite element method. First, the natural frequency of icing aluminum plate changing with thickness of ice is simulated by modal analysis. Then, the distributions of shear stresses at the interface between aluminum plate and ice layer changing with excitation frequencies are simulated by harmonic analysis. Second, the shear stress and de-icing area influenced by the size of piezoelectric ceramic and excitation voltage are analyzed. The simulation results show that there is lowest natural frequency with optimum thickness of ice layer used to de-bond ice for ultrasonic de-icing system. The optimum distribution law of shear stress at the interface between ice layer and aluminum is decided. In this condition, the shear stress and de-icing area increase along with the excitation voltage. However, the de-icing area increases slowly. All the simulation results lay a theoretical foundation for future experiments and application of ultrasonic de-icing.
Highlights
Icing on equipment, such as wind turbine and airplane, may cause low efficiencies and economic losses, sometimes even endanger people’s lives.[1,2,3,4] some scholars carried out a lot of researches on icing
The distribution law and the values of shear stress at the interface between aluminum plate and ice layer changing with the frequency, size of piezoelectric ceramic, and excitation voltage are researched by ANSYS
The results show that the size of piezoelectric ceramics decreases by 36%, but the maximum shear stress decreases by 77.2%
Summary
Icing on equipment, such as wind turbine and airplane, may cause low efficiencies and economic losses, sometimes even endanger people’s lives.[1,2,3,4] some scholars carried out a lot of researches on icing. The distribution law and the values of shear stress at the interface between aluminum plate and ice layer changing with the frequency, size of piezoelectric ceramic, and excitation voltage are researched by ANSYS. The change in the shear stress at interface and de-icing area ratio along with excitation voltage are researched based on above two icing aluminum plate models. With the increase in the excitation voltage, the de-icing area ratio begins to increase, and first grows fast and slowly
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