永磁式电磁阻尼器具有无接触、无污染、结构简单和可靠性高等优点，将其应用在火炮制退机上具有广阔的发展前景，但火炮在发射后产生的强冲击载荷使得电磁阻尼器的加速度最高可达1200m/s2，因此在强冲击载荷下磁阻尼力的影响亟需分析。为确保电磁阻尼器能够满足火炮制退机的使用要求，引入火炮后坐运动方程得到强冲击载荷下磁阻尼力的变化规律，同时利用解析模型和有限元模型对模型进行相互映证。对电磁阻尼器在后坐过程中产生的寄生效应如端部效应、磁性饱和与涡流去磁效应等进行分析，结果表明，在后坐过程中，端部效应使得端部区域磁场强度降低，从而降低磁阻尼力；磁性饱和使得涡流区域的面积增加，导致涡流去磁效应加强，使磁阻尼力曲线产生“马鞍”型效应。通过对磁阻尼力的影响进行分析，为后续电磁阻尼器的设计和优化研究提供参考。
Abstract
The permanent magnet type electromagnetic damper has the advantages of contact, no pollution, simple structure and high reliability, and it has a broad development prospect to be applied to the artillery recoil mechanism. However, the intensive impact load generated by the artillery after firing makes the acceleration of the electromagnetic damper up to 1200m/s2. Therefore, the influence of the magnetic braking force under the strong impact load needs to be analyzed urgently. To ensure that the electromagnetic damper can meet the requirements of the artillery recoil mechanism, the recoil equation of motion of the artillery is introduced to obtain the variation law of the magnetic braking force under the intensive impact load, and the analytical model and the finite element model are used to cross-validate the model. The results show that during the recoil process, the edge effect decreases the magnetic field strength in the edge area, which reduces the magnetic braking force; the magnetic saturation increases the area of the eddy current area, which strengthens the eddy current demagnetization effect and causes the magnetic damping force curve to have a "saddle" effect. By analyzing the effect of magnetic braking force, it provides reference for the subsequent design and optimization study of electromagnetic dampers.
关键词
电磁阻尼器 /
后坐运动方程 /
磁阻尼力 /
寄生效应
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Key words
Electromagnetic Damper /
recoil equation of motion /
magnetic braking force /
parasitic effect
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参考文献
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