Inside-wind tunnel water tank push plate type wave generation system and wave generation method

Abstract

The invention discloses an inside-wind tunnel water tank push plate type wave generation system and wave generation method. The wave generation system comprises a wave generator main bearing mechanism, a wave generator electric actuating mechanism, a push rod shaft, a servo control cabinet, a computer and a test area wave height sensor; first guide pairs are fixedly installed on two side walls of a water tank; a push plate is arranged in the water tank; the push plate is fixedly connected to the bottom of a main sliding table beam; the two ends of the main sliding table beam are in sliding connection with the first guide pairs respectively; second guide pairs are fixedly installed on the two side walls of a unit body; a transmission mechanism in the unit body is connected with a second sliding table; the second sliding table is connected with the second guide pairs in a sliding mode; and a motor connected with the transmission mechanism is arranged at one end of the unit body located on the outer side of the water tank. A wave generator is divided into the inner part and the outer part of the water tank, so that electrical and high-precision transmission mechanisms are positioned on the outer side of the water tank, the influence of moisture and water on the service life of the equipment is avoided, the maintenance of experimenters is facilitated, the dependence on a high-protection-level motor is avoided, and the input cost is reduced.

Description

technical field [0001] The invention relates to a wave simulation system in the experimental fields of coastal engineering, marine engineering and ship engineering, in particular to a wave-making system and a wave-making method of a water tank push plate type in a wind tunnel. Background technique [0002] In the fields of coastal engineering, ocean engineering, and ship engineering, waves, strong winds, and currents are the main loads of structures such as cross-sea bridges, oil platforms, and offshore wind power generation devices. Taking the sea-crossing bridge as an example, its structure has small rigidity, high flexibility, and small damping. Under the action of wind, vortex-induced vibration may occur; when waves act, the wave motion will change the characteristics of the wind field near the bridge, resulting in complex coupling effect; if there is a flow effect, the wave element will further change due to the flow of water particles. In order to more accurately eval...

AI Technical Summary

Problems solved by technology

Therefore, the first problem arises: the height of the guide bracket occupies a large part of the dry string, making the distance of the water surface from the bottom boundary of the wind tunnel too large

Excessive dry chord distance will cause the mutual propagation of wind and waves to pass through the effective area of ​​the experiment before reaching a stable stage, and the expected goal of the coupling experimental device cannot be achieved

The second problem is the impact of the closed environment and water environment in the wind tunnel on components and electrical

like figure 1 , in order not to cause turbulence and other effects on the wind field caused by the structure of the wave generator, it is usually necessary to erect a rigid detachable cover plate on the top of the wave generator and energy absorber, which will inevitably make the maintenance of the wave generator equipment inconvenient

At the same time, the closed humid environment will affect the life of electrical equipment, and even the rise of the water level during the wave making process will instantly submerge the motor

Although motors with a protection level above IP67 can resist instant immersion, there are few models available, and their speed, torque, and moment of inertia cannot meet the design requirements of different wave generators.

If the motor is customized, the investment will be extremely high

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