Single mass damper device for hull overall vibration control

Abstract

The invention relates to the field of mass damper devices, in particular to a single mass damper device for hull overall vibration control. The single mass damper device for hull overall vibration control comprises a single TMD device for controlling horizontal overall vibration of a hull and a single TMD device for controlling vertical overall vibration of the hull. During working, a first TMD mass block in the TMD device for controlling the horizontal overall vibration of the hull is pulled by a first spring to move to and fro between two baffles on a guide rail; a second TMD mass block in the TMD device for controlling the vertical overall vibration of the hull is pulled by a second spring to vertically move on an upright; and therefore, shock is absorbed by using inertia force resistance and antiresonance provided by assistant mass. The single mass damper device for hull overall vibration control is suitable for horizontal and vertical low frequency overall vibration control designof a large-sized surface ship, and has an obvious vibration control effect on the horizontal and vertical bending vibrations of the hull; and the overall response generated by the ship under the action of external load can be reduced, and the overall resistance of the ship to the horizontal and vertical bending vibrations is enhanced.

Description

technical field [0001] The invention relates to the field of mass damper devices, in particular to the field of a single mass damper device for total vibration control of the hull. Background technique [0002] Regardless of military ships such as destroyers and cruisers, or civilian ships such as transport ships, fishing ships, and engineering ships, structural robustness is the most basic and important performance, which determines the survivability and combat effectiveness of ships. For structural robustness, in addition to considering the impact of strength on it, hull structural vibration is also a major form of ship failure. The vibration of the hull structure not only has a significant impact on the work and life of the crew and the normal operation of mechanical equipment, but also directly affects the fatigue fracture strength of the structure itself. The local vibration of the ship structure, such as engine room vibration and hull stern vibration, requires that th...

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Problems solved by technology

For the excitation force of the propeller and the main engine, people can already use more effective methods to control the magnitude and spread of the excitation force, and the operating frequency must avoid the natural frequency value of the total vibration of the hull, but the propeller and the main engine equipment are in a static or standby state. Reaching the working state is a gradual time-domain process, which will definitely cause a certain degree of ship-wide resonance; wave load is an inevitable problem in ship navigation. However, the workload is large, and the wave load has a large randomness, and problems such as damping value need to be solved, so the vibration prediction caused by wave excitation is not accurate.

It can be seen from this that the total vibration of the whole ship caused by various excitations is unavoidable. Once the total vibration of the hull structure occurs, a large vibration response will be generated in the horizontal or vertical direction, which will seriously affect the firmness and vitality of the ship.

In addition, the overall vibration of the ship is a low-frequency vibration (down to a few Hz), and includes complex vibration forms such as horizontal and vertical, and the traditional vibration control methods are very ineffective

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