结霜影响航空、风电、热交换等装备的正常运行，轻则增加能耗，重则引发事故。针对热除霜方法能耗高、效率低、影响换热过程等问题，本课题以超声振动除霜技术为目标展开研究，在前期研究验证了超声除霜的技术可行基础上，根据超声除霜中存在的间歇运行优于连续运行、超声振动呈现驻波效应等现象，探索超声振动强化除霜技术。以大功率空气源热泵作为验证对象，首先通过理论分析、有限元仿真与试验测试，从超声振动的力学作用角度研究霜晶共振与超声间歇运行高效除霜的关系，探索超声波共振强化除霜机理；其次，基于波动理论研究超声在翅管式蒸发器中的传播特性，揭示超声导波类型及导波模态转换规律；在此基础上，利用驻波效应，提出超声驻波相控运动技术，实现驻波振峰行走强化除霜。通过研究，实现超声高效节能除霜理论和应用技术方面的突破，为创建高效节能的空气源热泵等产品提供理论支持和技术储备，同时对飞机、风电等运行过程除霜具有良好的借鉴意义。

Frosting influences the normal operation of aircraft, wind power generation equipment and heat exchanger equipment and leads to additional energy consumption. In severe cases frosting may lead to machine accidents even disasters. To solve the problems of high energy consumption, low efficiency and heat transfer process affection in heat defrosting method, we propose an ultrasonic vibration defrosting technology. Based on our previous study, which has proved that the ultrasonic defrost technology is feasible, the ultrasonic vibration strengthening defrosting technology will be further explored including the phenomenon that the intermittent ultrasonic vibration defrosting effect is superior than continuous ultrasonic vibration and the standing wave effect of ultrasonic vibration..The study will be focused on high-powered air source heat pumps. From the point of mechanical effect, the relationship between the frost crystal resonance and the ultrasonic intermittent operation high-efficiency defrosting will be examined through theoretical analysis, finite element simulation and experimental test to study the enhanced mechanism of ultrasonic resonance defrosting..In addition, the ultrasonic transmission characteristics in the finned-tube evaporator will be investigated based on the wave theory to reveal the guided wave type and the regularities of wave mode conversion. Based on this, the ultrasonic standing wave phased movement method will be established and the ultrasonic strengthen defrosting by standing wave resonance peak＂moving＂will be realized by using standing wave effect..This study can produce breakthroughs for the theories and applications of ultrasonic defrosting technology. The proposed method in this project can provide theoretical support and technology accumulations for developing high efficient, reliable ASHPs. Furthermore, it can be extended to other defrosting/de-icing fields such as blades of air-planes and blades of wind driven generators.