Theoretical analysis and test study on modal sensitivity of flexible strip steel under tension

WANG Xingdong1, HU Zhaoyang1, ZHENG Shuai2, WU Zongwu1, TANG Wei3, LI Xiaobai1, LU Guangtao1

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (17) : 313-323.

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (17) : 313-323.

Theoretical analysis and test study on modal sensitivity of flexible strip steel under tension

  • WANG Xingdong1, HU Zhaoyang1, ZHENG Shuai2, WU Zongwu1, TANG Wei3, LI Xiaobai1, LU Guangtao1#br#
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Abstract

The products of the roll-to-roll process are developing in the direction of thin and wide, and the changes in vibration characteristics caused by their flexible characteristics need to be further studied. For the elastically supported motion strip, the dynamic model of out-of-plane vibration was established, and the influencing factors of modal frequency sensitivity were analyzed. A test platform was built, and a method for selecting a hammer was proposed for the modal test of flexible belts. Modal tests of strip steel with different width-to-thickness ratios considering tension were carried out, and a numerical simulation model was established. The comparison between the finite element and the experimental results illustrates the effectiveness of the finite element model. The effects of width and thickness on the modal sensitivity of strip steel under different tensions, and the influence of tension on the sensitivity of different strip modes were quantitatively analyzed. The results show that the sensitivity of the m=2nd order mode with different width and thickness changes is greatly affected and increases with the increase of width and thickness, while the sensitivity of the other 4th order modes is close to 0. The modal sensitivity of the n=3rd order is twice that of the n=2nd order under different tensions, and both increase with the increase of tension, and the (2,2) and (2,3) order modal frequencies of thinner and wider steels are more sensitive to the change of tension.

Key words

Flexible strip / Modal sensitivity / Elastic support / Surface tension / Experimental study

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WANG Xingdong1, HU Zhaoyang1, ZHENG Shuai2, WU Zongwu1, TANG Wei3, LI Xiaobai1, LU Guangtao1. Theoretical analysis and test study on modal sensitivity of flexible strip steel under tension[J]. Journal of Vibration and Shock, 2024, 43(17): 313-323

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