Asymmetric Gripper-induced Vibration Responses Analysis for a Cracked Cantilever Beam

MA Hui1,2, ZHANG Wensheng1, ZENG Jin1, WU Shuang1

Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (12) : 37-42.

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (12) : 37-42.

Asymmetric Gripper-induced Vibration Responses Analysis for a Cracked Cantilever Beam

  • MA Hui1,2, ZHANG Wensheng1, ZENG Jin1, WU Shuang1
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Abstract

In this paper, it mainly took cantilever beam as a research object, the beam model with single-sided crack and asymmetric gripper was established by ANSYS software, and the offset boundary and crack-induced vibration responses were analyzed, and the corresponding relationship between the system vibration and offset boundary of cantilever beam and crack location were revealed. The results show that double frequency amplitude of system vibration responses firstly decreases and then increases with the increase of offset boundary when the crack is on the bottom of the beam, and the vibration effects are similar to single-sided up-crack because cantilever beam stiffness can be changed by the offset boundary. At the moment double frequency component of the system disappears due to offset boundary-caused analogous up-crack and down-crack have reached to symmetry on the structure when it locates at the specific point and the more distant the offset boundary is, the more intense system nonlinear becomes; double frequency amplitude of system vibration responses increases with the increasing offset boundary when the crack is on the top of the beam , it is also because the offset boundary-caused analogous up-crack and up-crack at the same side increase the system nonlinear under the premise of the given depth, location of a crack and the offset boundary.
 

 

Key words

cracked cantilever beam / asymmetric gripper / finite element / offset boundary / vibration responses

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MA Hui1,2, ZHANG Wensheng1, ZENG Jin1, WU Shuang1 . Asymmetric Gripper-induced Vibration Responses Analysis for a Cracked Cantilever Beam[J]. Journal of Vibration and Shock, 2017, 36(12): 37-42

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