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首先建立了电脉冲除冰系统的电路模型,求解了有无二极管条件下的理论脉冲电流曲线,通过分析计算电流与实验电流,提出了将正弦半波电流函数用于电磁场分析以简化研究除冰激励的观点,同时求解了不同电流方式下的电磁压力分布,再用结构动力学分析了不同压力载荷下实验铝板的响应位移。其次通过比较铝板中心位移实验值与动力学求解的响应位移值,其有效的吻合程度验证了用正弦半波函数电流简化电脉冲除冰激励分析的可行性。最后,在利用正弦半波电流函数简化分析脉冲激励的基础上,研究了电流大小、电频率、铝板厚度、铝板弹性模量、铝板密度以及铝板长宽比对最大响应位移的影响。研究结果表明,最大响应位移随电流增大而增大,随铝板厚度、弹性模量与密度的增大而减小,且随电频率的改变而改变,但几乎不受铝板长宽比的影响;在研究电频率时得出,可将电频率与系统结构固有频率以1:1的比例设计,此关系式是电脉冲除冰系统电路设计的基础。
First, the circuit model of the electric pulse deicing system is established, and the theoretical impulse current curve with or without diode is solved. By analyzing and calculating the current and the experimental current, a half-sine current function is proposed for the electromagnetic field analysis to simplify the de-icing In the same time, the distribution of electromagnetic pressure under different current modes was solved simultaneously. Then the response displacement of experimental aluminum plate under different pressure loads was analyzed by structural dynamics. Secondly, by comparing the experimental displacement of the displacement center of the aluminum plate and the response value of the kinetic solution, the effective coincidence degree verifies the feasibility of using the sine half-wave function current to simplify the de-icing excitation of the electrical pulse. Finally, the influence of current, frequency, thickness of aluminum sheet, elastic modulus of aluminum sheet, density of aluminum sheet and aspect ratio of aluminum plate on the maximum response displacement was studied based on the simplification of the pulse excitation by half-sine current function. The results show that the maximum response displacement increases with the increase of current and decreases with the increase of the thickness, modulus and density of the aluminum plate, and changes with the change of the electric frequency, but it is almost unaffected by the aspect ratio of the aluminum plate ; When we study the electric frequency, we can design the electric frequency and the natural frequency of the system structure in the ratio of 1: 1, which is the basis of the circuit design of the electric pulse deicing system.