This paper focuses on resonant ice protection systems and proposes key performance indicators to analyze the performances of such systems with respect to levels of energy, force, and power required for de-icing. The principle of these systems is to apply vibrations or ultrasonic waves onto the structure that create high-level stresses greater than those required to crack and delaminate to remove the ice accumulated on the structure. The computation of the indicators requires two values: the ice adhesion strength and the critical strain energy release rate. Computations are performed assuming three stages of a de-icing mechanism: first, an initiation of cohesive fractures by tensile stress at the top surface of the ice layer; second, a propagation of cohesive fractures within the ice; and, third, a propagation of adhesive fractures at the ice/substrate interface starting from the base of the cohesive fractures previously created. The proposed key performance indicators provide guidance on the use of flexural and extensional modes in resonant ice protection systems and on the frequency range to favor when looking at fractures initiation and propagation. Calculations based on the key performance indicators show a potential power reduction by 10 with resonant electromechanical de-icing systems compared to electrothermal systems.

本文着重讨论防冰保护系统，并提出关键性能指标，以针对除冰所需的能量，力和功率水平分析此类系统的性能。这些系统的原理是将振动或超声波施加到结构上，从而产生高水平应力，该高水平应力大于破裂和分层以去除积聚在结构上的冰所需的应力。指标的计算需要两个值：冰的附着强度和临界应变能释放速率。计算是在除冰机制的三个阶段进行的：首先，由冰层顶面上的拉应力引起的内聚破裂。第二，在冰中传播内聚性裂缝。第三，从先前产生的内聚破裂的底部开始，在冰/底物界面处的内含粘接裂缝的扩散。拟议的关键性能指标为在共振冰保护系统中使用弯曲和伸展模式以及在观察裂缝的形成和扩展时应优先使用的频率范围提供了指导。根据关键性能指标进行的计算表明，与电热系统相比，共振机电除冰系统的潜在功率降低了10％。