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Two-freedom nonlinear vibration absorption device

A non-linear, degree-of-freedom technology, applied in the direction of non-rotational vibration suppression, etc., can solve the problem that vibration cannot be effectively absorbed, and achieve the effect of simple structure, easy maintenance and replacement, and reduction of vibration peaks

Inactive Publication Date: 2014-01-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the traditional linear stiffness vibration absorber is only effective at its natural frequency and cannot effectively absorb vibrations not at its natural frequency, the present invention further proposes a two-degree-of-freedom nonlinear vibration-absorbing device

Method used

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  • Two-freedom nonlinear vibration absorption device
  • Two-freedom nonlinear vibration absorption device
  • Two-freedom nonlinear vibration absorption device

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Experimental program
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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 2 with image 3 To illustrate this embodiment, a two-degree-of-freedom nonlinear vibration-absorbing device described in this embodiment includes a first mass block 3, a second mass block 4, a first elastic string 5, a second elastic string 6, a rubber damping layer 7, two A first support frame 1 and two second support frames 2, the two first support frames 1 are arranged side by side in parallel from top to bottom, the two ends of the first elastic string 5 are respectively connected with a first support frame 1, the first The middle part of the elastic chord 5 is fixedly connected to one end of the first mass block 3, and two second support frames 2 are arranged side by side on the end face of the other end of the first mass block 3 from top to bottom, and each second support frame 2 The axis along the length direction is perpendicular to the other end face of the first mass block 3, the two ends of the second elastic...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination image 3 To illustrate this embodiment, the length of the connection between the first mass block 3 and the first elastic string 5 of a two-degree-of-freedom nonlinear vibration-absorbing device described in this embodiment does not exceed one tenth of the length of the first elastic string 5 . The length of the joint between the second mass block 4 and the second elastic string 6 is no more than one tenth of the string length of the second elastic string 6 . Other components and connections are the same as those in the first embodiment.

[0010] working principle

[0011] combine figure 1 Illustrate that the principle that the present invention utilizes realizes cube rigidity is as follows:

[0012] x is the displacement caused by the elastic string under the force f, then the relationship between force and displacement is as follows:

[0013] f=kx[1-L(L 2 +x 2 ) -0.5 ]

[0014] k is the linear stiffness, and L is o...

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Abstract

The invention relates to a vibration absorption device, in particular to a two-freedom nonlinear vibration absorption device, aiming at solving the problem that the traditional linear rigidity vibration absorber is only effective at the part with natural frequency, and can not effectively absorb the vibration which is not at the part with natural frequency. The two-freedom nonlinear vibration absorption device comprises two first support frames which are arranged in parallel from top to bottom; the two ends of a first elastic string are respectively connected with the two first support frames; the middle part of the first elastic string is fixedly connected with one end of a first mass block; two second support frames are arranged on the end surface of the other end of the first mass block in parallel from top to bottom; the two ends of a second elastic string are respectively connected with the two second support frames; the end surface of one end of a second mass block is connected with the middle part of the end surface of the other end of the first mass block; and the other end of the second mass block is fixedly connected with the middle part of the second elastic string. The two-freedom nonlinear vibration absorption device is used for shock absorption and noise control in the fields such as machinery, construction, electrical equipment and the like.

Description

technical field [0001] The invention relates to a vibration-absorbing device, in particular to a two-degree-of-freedom nonlinear vibration-absorbing device. Background technique [0002] Linear stiffness vibration absorbers are mainly used in vibration reduction and noise control in the fields of machinery and electrical equipment. Traditional linear stiffness vibration absorbers are only effective at their natural frequencies, and cannot effectively absorb vibrations that are not at their natural frequencies. Contents of the invention [0003] In order to solve the problem that the traditional linear stiffness vibration absorber is only effective at its natural frequency and cannot effectively absorb vibrations not at its natural frequency, the invention further proposes a two-degree-of-freedom nonlinear vibration-absorbing device. [0004] The technical solution adopted by the present invention to solve the above problems is: the present invention includes a first mass b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/02F16F15/08
Inventor 孔宪仁曹喜滨孙兆伟叶水池张也弛
Owner HARBIN INST OF TECH
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