Swing device for suppressing large-amplitude vibration of large floating ocean structure

Abstract

The invention belongs to the technical field of floating type ocean structure vibration control research, and provides a swing device for restraining large-scale floating type ocean structure large-amplitude vibration. A flexible, light and high-strength cloth is laid and connected to a large-area frame composed of longitudinal and transverse ropes and steel pipe beams; and the single-layer or multi-layer frame is suspended at a plurality of specified positions below the ocean structure by utilizing a plurality of high-strength ropes with enough tensile rigidity. When the floating structure drives the device to vibrate in water, the gravity of the device and the water body generate huge additional inertia force and additional damping force to do negative work, the vibration energy of the structure is consumed, and therefore the large-amplitude vibration of the device is restrained. In addition, the device and the structure are flexibly connected, so that vibration in multiple directions can be inhibited, and particularly, the vertical effect is optimal. The dead weight of the swing device and rope length are convenient to adjust, and control of different amplitudes is facilitated. Moreover, the device is simple in structure, easy in parameter adjustment, capable of controlling various vibrations, wide in application, practical, economical and excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of vibration control research on large-scale floating marine structures (such as marine platforms, wind turbines, storage and transportation platforms, etc.), and relates to an oscillation device for suppressing large-scale vibrations of large-scale floating marine structures. Background technique [0002] Large floating marine structures (such as offshore platforms, wind turbines, storage and transportation platforms, etc.) are usually flexible and complex structural systems. Under the single or coupled action of dynamic loads such as wind, waves, and currents, these structures may produce large-scale vibration responses in different degrees of freedom, such as vertical, horizontal, torsion, and swing, and have strong randomness, which is very comfortable for workers. Performance, even safety and normal service of the structure are adversely affected. Extreme conditions may cause structural failure and cas...

AI Technical Summary

Problems solved by technology

[0005] (1) In order to ensure that the water body can provide sufficient resistance, the size of the heave slab should be as large as possible, but in order to ensure that the heave slab has sufficient stiffness, it is necessary to increase the thickness of the slab or set up a stiffener or truss system, which will undoubtedly increase The cost of materials will greatly increase the project cost;

[0006] (2) In order to ensure sufficient rigidity, the heave plate is generally made of light rigid anti-rust metal materials. Due to the large area and mass, the cost of materials, construction, disassembly and maintenance is high;

[0007] (3) Due to the large area of ​​the heave plate, the distance between the heave plate and the structure needs to be as large as possible to ensure greater resistance. The rigid column connectors (generally using metal components) are required to have sufficient strength and rigidity and length, and therefore expensive;

[0008] (4) If upper and lower layers of heave plates are installed, in order to ensure the control efficiency of each layer of heave plates, the spacing between the heave plates should not be too small, and a larger spacing will undoubtedly increase the size of the connectors and related costs;

[0010] (6) The effect of the heave plate on the vertical vibration control is better, but the control effect on the vibration of other degrees of freedom is not obvious

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