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A vibration-damping sandwich beam and a vibration-damping ship plate frame

A technology of sandwich beams and ship plates, applied in ship construction, ship components, non-rotational vibration suppression, etc., can solve the problems of limited load frequency, load amplitude and proportion of viscoelastic materials in vibration reduction effect.

Active Publication Date: 2022-03-04
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In traditional vibration reduction methods, viscoelastic materials (such as rubber) are introduced into the protected structure (such as hull plate frame) to improve structural damping to achieve vibration reduction, but the vibration reduction effect is limited by the load frequency, load amplitude and viscoelasticity. Proportion of elastic material

Method used

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  • A vibration-damping sandwich beam and a vibration-damping ship plate frame
  • A vibration-damping sandwich beam and a vibration-damping ship plate frame
  • A vibration-damping sandwich beam and a vibration-damping ship plate frame

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Embodiment 1

[0025] Such as figure 1 As shown, this embodiment provides a vibration-damping sandwich beam, which includes a body, an upper beam 1, an elastic layer 2 and a lower beam 3 that are bonded sequentially from top to bottom, wherein the elastic layer 2 is made of viscoelastic material. Such as rubber, etc.; an axial load P is applied in the length direction of the body, the axial load P is less than the critical buckling load of the upper beam and greater than the critical buckling load of the lower beam, and the lower beam 3 is under the axial load P Under the action, it protrudes and deforms in the direction of the upper beam 1.

[0026] The vibration damping effect of the vibration damping sandwich beam provided in Embodiment 1 is analyzed below through theoretical analysis.

[0027] When the axial load P is less than the upper beam but greater than the critical buckling load of the lower beam, considering the geometric nonlinearity caused by the large transverse displacement,...

Embodiment 2

[0046] Such as Figure 6 As shown, this embodiment discloses a vibration-damping ship plate frame, which includes a plate body 4, and a number of vibration-damping sandwich beams disclosed in Embodiment 1 are arranged at the bottom of the plate body 4, and several vibration-damping sandwich beams are arranged in parallel and at intervals . Wherein, the top of the upper beam 1 abuts against the bottom of the plate body 4 , and the upper beam 1 , the elastic layer 2 and the lower beam 3 are arranged in sequence along the direction away from the plate body 4 .

[0047] Specifically, the damping sandwich beam further includes an end plate 5 arranged at the end of the body, one end of the body in the longitudinal direction is fixedly connected to the plate body 4 , and the other end is fixedly connected to the plate body 4 through the end plate 5 . When installing, firstly connect one end of the body in the length direction with the plate body 4, and then install the end plate 5. ...

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Abstract

The invention relates to a vibration-damping sandwich beam and a vibration-damping ship plate frame, wherein the vibration-damping sandwich beam includes a body, and the body is sequentially arranged from top to bottom with an upper beam, an elastic layer and a lower beam; in the body An axial load is applied in the length direction of the upper beam, which is less than the critical buckling load of the upper beam and greater than the critical buckling load of the lower beam; the lower beam moves toward the upper beam under the action of the axial load The direction of the convex deformation. The vibration-damping sandwich beam of the invention can increase the structural vibration-damping effect under the condition that the load frequency, the load amplitude and the proportion of the viscoelastic material remain unchanged.

Description

technical field [0001] The invention relates to the technical field of ship plate vibration damping structures, in particular to a vibration damping sandwich beam and a vibration damping ship plate frame. Background technique [0002] Marine and ship engineering structures may be subjected to dynamic external loads such as waves, and effective vibration reduction has become a major requirement to ensure the safety of marine engineering structures. [0003] In traditional vibration reduction methods, viscoelastic materials (such as rubber) are introduced into the protected structure (such as hull plate frame) to improve structural damping to achieve vibration reduction, but the vibration reduction effect is limited by the load frequency, load amplitude and viscoelasticity. percentage of elastic material. Therefore, it is urgent to design a better vibration-damping structure to increase the vibration-damping effect of the structure when the load frequency, load amplitude, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B17/00F16F15/04
CPCB63B17/0081F16F15/04
Inventor 方辉刘泽段利亚刘勇
Owner OCEAN UNIV OF CHINA