Damping method and device for friction induction modal conversion

A friction-inducing and shock-absorbing device technology, applied in earthquake-proofing, bridge parts, bridge construction, etc., and can solve problems such as destructive accidents

Active Publication Date: 2019-03-12
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a friction-induced variable mode shock absorption m

Method used

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  • Damping method and device for friction induction modal conversion
  • Damping method and device for friction induction modal conversion

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Embodiment 1

[0038] For the specific device embodiment 1, reference may be made to the friction-induced variable-mode damping device used in the method embodiment, and details will not be repeated here.

Embodiment 2

[0040] In device embodiment 1, the translation mechanism used to drive the friction unit to move axially along the beam structure is a screw nut structure composed of a ball slider 11 and a screw 10, and the screw 10 is driven to rotate forward by a bidirectional rotating motor 12 Or reverse rotation to realize bidirectional linear motion of the ball slider 11 along the axial direction of the lead screw 10 . In this embodiment, this structure is no longer used, but the existing sliding platform structure is used. The sliding platform structure includes a translation track, and a slide block is guided and assembled on the translation track, and the slide block is connected with a motor. Driven by the motor, the slider is driven to reciprocate along the translation track. At this time, the linear motor can be arranged on the slider to drive the friction unit to move axially along the beam structure.

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Abstract

The invention relates to a damping method and device for friction induction modal conversion. The method comprises the steps of performing pre-modal experimental analysis on a beam structure, obtaining response signals of the beam structure, and determining a main modal forming response, wherein the main modal is the main composition for the beam structure response signal under the current excitation condition; performing damping treatment, wherein normal pressure is applied to the beam structure at any vibration mode extreme value position corresponding to the main modal of the beam structure, transverse friction force along the beam structure is generated, normal pressure is gradually increased, and response to the beam structure is detected; if response is lowered to be not larger thana set threshold value, determining the main modal forming the response again, and repeatedly executing the damping treatment process till the response of the beam structure is lowered to be larger than a set threshold value. Pre-modal experimental analysis is performed on the beam structure, the main modal is determined, damping treatment is performed according to the main modal, the method is simple and reliable, and large movement of the structure caused by mismatching of modals or resonance can be greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of structural vibration suppression, and in particular relates to a friction-induced variable mode vibration reduction method and device. Background technique [0002] Vibration is such a pervasive natural phenomenon that it can be observed and applied in almost every field in every branch of physics and in many interdisciplinary fields. Large vibrations are often caused by resonance, which will cause large mechanical and structural deformation and dynamic stress, and even cause destructive accidents. Therefore, in the design, manufacture and installation of various buildings such as bridges and docks, aircraft, ships, engines and other machinery and equipment, in order to ensure the safe operation of the building structure and the normal operation of the machine, the problem of large vibration caused by resonance must be considered. Contents of the invention [0003] The object of the present invention i...

Claims

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Application Information

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IPC IPC(8): E04B1/98E04H9/02E01D19/00
CPCE01D19/00E04H9/021
Inventor 赵峰罗国富杜文辽张德海李一浩谢欢王良文
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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