A new method was presented to inhibit bulging deformation and fluctuation of free surface by magnetic pressure. A research combined with numerical and experimental methods was conducted to investigate the feasibility and inhibition efficiency. The parameters including magnetic flux density, frequency and action area of magnetic pressure were analyzed. The results show that the method is feasible, and the bulged free surface is fully inhibited by the proper magnetic pressure. The inhibition efficiency increases as the increase in magnetic flux density and frequency, which shows a linear relationship with the magnetic flux density. The frequency has a great influence on the inhibition efficiency when the frequency is changed from 0.15 to 5.00 kHz. However, the frequency more than 5.00 kHz has little influence on the inhibition efficiency and is recommended in application process. When the ratio of the action area to the area of bulged free surface is 0.8, the best inhibition is achieved. However, when the ratio is more than 1.2, a distinct W-shaped free surface is observed. The surficial and internal flow is strengthened with proper magnetic pressure imposed. Moreover, under the action of magnetic pressure, the fluctuation amplitude of free surface decreases from 4.0 to 1.2 mm and the main fluctuation with frequency of 2.34 Hz is dispersed into several minor fluctuations with frequency of 0.4–4.3 Hz.

提出了一种新的抑制磁鼓胀变形和自由表面波动的方法。结合数值和实验方法进行了研究，以探讨其可行性和抑制效果。分析了磁通密度，频率和磁压作用面积等参数。结果表明，该方法是可行的，适当的磁压力可以完全抑制凸起的自由表面。抑制效率随着磁通密度和频率的增加而增加，这与磁通密度呈线性关系。当频率从0.15 kHz更改为5.00 kHz时，频率对抑制效率有很大影响。但是，频率超过5。00 kHz对抑制效率影响很小，建议在应用过程中使用。当作用面积与凸起的自由表面面积之比为0.8时，可获得最佳抑制效果。但是，当该比率大于1.2时，观察到明显的W形自由表面。通过施加适当的磁力，可以增强表面和内部的流动。此外，在磁力的作用下，自由表面的波动幅度从4.0减小到1.2 mm，频率为2.34 Hz的主要波动分散为频率为0.4-4.3 Hz的几个较小波动。通过施加适当的磁力，可以增强表面和内部的流动。此外，在磁力的作用下，自由表面的波动幅度从4.0减小到1.2 mm，频率为2.34 Hz的主要波动分散为频率为0.4-4.3 Hz的几个较小波动。通过施加适当的磁力，可以增强表面和内部的流动。而且，在电磁压力的作用下，自由表面的波动幅度从4.0减小到1.2 mm，频率为2.34 Hz的主要波动被分散为频率为0.4-4.3 Hz的几个微小波动。