Tuning rotational inertia damping vibration attenuation device

Abstract

The invention relates to a tuning rotational inertia damping vibration attenuation device. The tuning rotational inertia damping vibration attenuation device comprises a rotational inertia mass block, a torsion damper and a rotating restoring force providing mechanism. One end of the rotating restoring force providing mechanism and one end of the tension damper are fixedly connected to a structure, and the other end of the rotating restoring force providing mechanism and the other end of the tension damper are connected to the rotational inertia mass block. The rotational inertia mass block is parallel to the rotating surface of the structure, the rotating restoring force providing mechanism is perpendicularly connected with the rotational inertia mass block, and the torsion damper is perpendicularly connected with the rotational inertia mass block. By the adoption of the structure, because the rotational inertia mass block parallel to the rotating surface of the structure is arranged, when the structure moves in a rotating mode, rotating motion can be transmitted to the rotational inertia mass block through the rotating restoring force providing mechanism, and accordingly the torsion damper is driven, the energy of the rotating motion is absorbed by the torsion damper, and the tuning rotational inertia damping vibration attenuation device has a very good damping effect.

Description

technical field [0001] The invention relates to a control system of a frequency-modulated moment of inertia damping device for structural rotational motion control that works in the form of rotary or rotational motion. The new control system is referred to as the TRID system hereinafter. Background technique [0002] With the development of the economy and society, the country invests more and more in civil engineering and infrastructure construction every year. A large number of landmark major projects such as high-rise buildings, long-span bridges, large stadiums, nuclear power plants, and offshore oil drilling platforms have been built. A large number of civil engineering structures represented by them are inevitably subject to various loads during construction and use, including static loads and dynamic loads, dynamic loads such as earthquakes, wind, etc., for marine engineering The structure is also subject to the joint excitation of ocean wind, wave and current, as wel...

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Problems solved by technology

[0007] However, when the TMD system is used to control the swing problem of the suspended mass system, it is found that when the suspension direction of the structure is consistent with the direction of the shimmy motion, the TMD system can play an effective control role whether it is the initial deflection or the excitation input of the simple harmonic load; When the TMD system is used to control the shimmy vibration in another direction of the structure, that is, when the suspension direction of the structure is perpendicular to the shimmy motion direction, no matter how to adjust the system parameters (such as the structure pendulum length, the position of the control system, etc.), the TMD system will always fail to work

After a lot of theoretical analysis and experimental exploration, the conclusion that the translational TMD control system can only control the translational motion of the structure and is ineffective for the control of the rotary shimmy

[0008] The movement of various structural systems is inevitably affected and affected by the gravity field. For example, the free movement control of a single pendulum suspension structure in the gravity field, such as the hook head structure of the lifting pipe-laying ship hook system, or due to the The forced motion control of the hook head caused by the wave excitation, and the floating motion control of a floating deep-water ocean platform structure similar to an inverted pendulum structure system under the loads of wind, waves, etc., or the flexible bending of a towering structure Vibration control, etc. Therefore, after a lot of theoretical analysis and calculation, it is found that traditional structural vibration control methods, such as applying linear control force in the horizontal plane (X or Y direction) perpendicular to the direction of the gravity field, such as using passive tuned mass dampers (English name Tuned Mass Damper, referred to as TMD) or tuned liquid damper (English name Tuned Liquid Damper, referred to as TLD) control system, or even active mass damper / driver (English name Active Mass Damper / Driver, referred to as AMD) control system It is difficult to achieve effective control or the control effect is poor

The fundamental reason is that the passive control systems such as TMD and TLD are in a centrifugal state and lose their function, the system mass block (or the water in the TLD water tank) does not move at all, and the active control force of the AMD system needs to overcome the gravity component of the mass block to make it Control efficiency is greatly reduced

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