The axial fixed position preload is applied to middle ring of the shaft, the axial rigidity of the angular contact ball bearing is obtained by the impulse excitation tests.
对转台中环主轴施加轴向定位预紧力，通过脉冲激励法试验得到角接触球轴承的轴向刚度，试验结果与理论结果吻合较好，为转台研制中各轴系预紧量的控制提供了理论和实验依据。
Due to maglev railway adopts traveling crane technique of non-contact, passengers don't become aware of portrait impulse and shake.
由于高速磁悬浮铁路采用了非接触式的行车技术，舒适性将得到很好的改善。
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