Bidirectional forced vibration experimental apparatus of segmented model of FISHFARM float bowl under uniform flow

Abstract

The invention provides a bidirectional forced vibration experimental apparatus of a segmented model of a FISHFARM float bowl under a uniform flow. The experimental apparatus comprises a float bowl segmented model, prosthesis modules, horizontal sliding models, vertical sliding modules, and a measurement analysis control module. Besides, two ends of the float bowl segmented model are respectively connected with the end portion prosthesis modules; the vertical sliding modules are respectively connected with the end portion prosthesis modules and the horizontal sliding models; the horizontal sliding models are fixedly connected with bottoms of a trailer; the measurement analysis control module is placed on the trailer and is connected with the float bowl segmented model, the prosthesis modules, the horizontal sliding models, and the vertical sliding modules. According to the invention, forced vibration can be carried out at two directions; an optical fiber sensor is arranged on a fishingnet, so that a local tress of the fishing net can be measured; a three-component force device is arranged in a float bowl module to measure an integral stress of the fishing net; and a three-component force device is arranged outside the float bowl module to measure an integral stress of the fishing net and the float bowl; in addition, a special end portion prosthesis device is utilized, so that a problem on a model boundary effect is solved; and a test condition can reach an actual KC number range so as to avoid a scale effect.

Description

technical field [0001] The invention belongs to the field of marine engineering, and in particular relates to a bidirectional forced vibration experiment device of a FISHFARM buoy section model under uniform flow. Background technique [0002] The entire FISHFARM structure is placed in the sea, and its upper buoys and fishing nets will be subjected to the hydrodynamic effects of ocean currents and waves. Therefore, the dynamic analysis of the overall structure of FISHFARM becomes the key to whether it can be applied to engineering practice, and most of the methods used are model tests. [0003] However, most of the existing test models are the overall model of FISHFARM. In the limited space of the test pool, a large scale ratio needs to be adopted, resulting in too small KC number, which inevitably leads to scale effects. Therefore, in order to simplify the research problem, in the study of FISHFARM's hydrodynamic response, theoretical researchers began to focus on decompos...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a FISHFARM buoy segmented model dual-degree-of-freedom forced vibration experimental device under the action of uniform flow, aiming to solve the problem that the existing test device is limited to the overall model, the scale effect is large, and the simulation is relatively low KC number For sea conditions, there is no boundary treatment for buoys, and it is limited to the simulation of downstream single-degree-of-freedom vibration, which cannot simulate the actual sea conditions more realistically

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