Parameter-adjustable inertia mass damper for model stay cable vibration absorption testing
A technology of inertial mass and damper, applied in inertial mass damper with adjustable damping coefficient, model cable vibration reduction test research, inertial mass field
Pending Publication Date: 2018-10-16
ZHEJIANG UNIV
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[0004] In the public document "Lu L, Duan Y-F, Spencer BF Jr, Lu X, Zhou Y. Inertial mass damper for mitigating cable vibration. Struct Control Health Monit. 2017; e1986", it is theoretically calculated and proved that this type of damper can obtain The energy dissipation capacity of the traditional viscous damper is twice that of the traditional viscous damper, but there is no public literature report on the test situation
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[0023] An inertial mass damper with adjustable inertial mass and damping coefficient, comprising: a connecting piece (1), a ball screw (2), a thrust ball bearing (3), a cylindrical mass (4), a ball nut (5 ), damper shell (6), viscous damping liquid (7), insert plate (8), angle adjustment device (9), base (10), the damper is divided into the upper part of the inertial component and the lower part of the viscous The damper component; the inertial component includes: a ball screw (2), a ball nut (5), a thrust ball bearing (3), and a cylindrical mass block (4). The components of the viscous damper include: viscous damping liquid (7) and insert plate (8); when the ball screw (2) moves up and down in translation, the ball nut (5) is restricted by the thrust ball bearings (3) at both ends. The high-speed rotation drives the fixed cylindrical mass (4) to rotate, generating negative stiffness; meanwhile, the insert plate reciprocates in the viscous damping liquid (7), generating viscou...
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The invention provides a parameter-adjustable inertia mass damper applicable to model stay cable vibration absorption testing and belongs to the field of vibration suppression. The parameter-adjustable inertia mass damper comprises a ball screw pair, a thrust ball bearing, a cylindrical mass block, a sticky damper component, a damper shell, a base, an angle adjusting device and a connecting piece.The whole inertia mass damper is connected with a model stay cable and a screw rod through the connecting piece, when the model stay cable vibrates, a screw rod is driven to move vertically, the vertical movement of the screw rod is converted into rotation of a ball nut and the cylindrical mass block on the ball nut, and the negative rigidity characteristic is generated. The sticky damper component is a shear-type sticky damper, and an insertion plate moves back and forth vertically in a damping solution to generate sticking force to dissipate energy. During model stay cable vibration absorption testing, the working conditions are designed by conveniently loading and unloading the cylindrical mass block and changing the type of the sticky damping liquid so as to verify the influence of the parameters of the inertia mass damper on vibration absorption testing.
Description
technical field [0001] The invention belongs to the field of vibration suppression, in particular to an inertial mass damper with adjustable inertial mass and damping coefficient, which is applied to the vibration reduction test research of model cables. Background technique [0002] The external damper is a method widely used in cable-stayed vibration control engineering, but for long cable-stayed cables, the installation height of the external damper is too high, which is not conducive to installation and maintenance, and has a great impact on the landscape. Can't provide enough damping. [0003] In the research process of semi-active control, some scholars have pointed out that the negative stiffness characteristics are beneficial to the control effect. The invention converts the up and down translation of the screw into the high-speed rotation of the cylindrical mass through the mechanical structure, that is, the ball screw pair, so as to generate a large inertial mass ...
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Login to View More IPC IPC(8): F16F15/023F16F15/22
CPCF16F15/023F16F15/22
Inventor 段元锋莫凯程章红梅
Owner ZHEJIANG UNIV