电脉冲除冰系统的结构力学性能分析

电脉冲除冰（EIDI）作为一种电动-机械式除冰系统，具有广阔的应用前景。本文采用线圈和金属平板组成的电脉冲系统作为EIDI结构动力学模型的研究对象，基于有限元分析软件MSC/NASTRAN，建立了一套针对典型平板-线圈结构的EIDI系统结构动力学仿真模型，研究了模型的固有特性（模态与频率）与时域响应分析，并开展了仿真模型的实验验证。研究了基于模型的EIDI系统结构动力学特性，重点关注最大应变和位移在空间的分布规律，并讨论了电容、电压等放电参数的影响。研究表明，电脉冲作用下，平板最大位移分布特性近似“马鞍型”，提升电容和电压可以增大脉冲力峰值和结构变形量，同时减小固定位置处的应变。

Performance analysis on structural dynamics of EIDI system

As an electromechanical de-icing system, electro-impulse de-icing (EIDI) technology has broad application prospect. In the present paper, structural dynamics characteristics of a simplified EIDI system consisting of coil and metal plate were numerically and experimentally studied. A finite element simulation model of an EIDI system was constructed, and the structural dynamics was analyzed by FEM software MSC/NASTRAN. The inherent characteristics (modal and frequency) as well as the transient response of the model were analyzed. The simulation was then validated by the experimental measurement. The structure dynamics characteristics of an EIDI model were studied. The maximum strain and displacement of the skin surface characteristic locations were evaluated with different capacitance, voltage and clearance between the skin and the coils. It is found that under the electro-impulse, the maximum displacement of the metal plate presents a saddle-like distribution. Increasing the capacitance and voltage will increase the impulse peak value and the structural deformation, and meanwhile, the strain of fixed location will be decreased.