Cable type intelligent seaworthiness instrument apparatus

Abstract

The invention provides a cable-type intelligent airworthiness instrument device, which includes two height-adjustable pillars arranged on both sides of the water area, hoists respectively installed on the two pillars, a cable arranged between the two hoists, and a The lower end of the cable is provided with a support, the lower end of the support is provided with a ship model, and the support is provided with a measuring device. Since the cable-type intelligent airworthiness instrument device of the present invention carries out relevant hydrodynamic performance tests in real waters, compared with pool tests, it avoids the use of equipment such as pool aircraft and wave generators with high construction costs, and does not need to consider At the same time, the device has reasonable structure, easy operation, lower cost, more accurate experimental results and better test performance, which is of great significance to this type of test and has a very broad application prospect.

Description

Technical field [0001] The invention relates to a cable type intelligent seaworthiness instrument device, which is a new type of ship hydrodynamic performance measuring device suitable for lakes or reservoirs, which is a modification of the existing ship model towing pool measuring equipment. Background technique [0002] The ship model towing tank is a kind of equipment for hydrodynamic experiment, which can usually carry out fluid related tests such as ship model resistance test, self-propelled test, seakeeping test and propeller open water test. Limited to the test environment and scale of the tank, the scale effect and the Reynolds number need to be analyzed when the test data is processed. That is to say, it is impossible to meet the condition that all similarity criteria are equal to the actual ship during the ship model test. Similarity, leading to deviations in the estimation of actual ship performance from model test results. [0003] When carrying out hydrodynamic tests ...

AI Technical Summary

Problems solved by technology

Limited to the test environment and scale of the tank, it is necessary to analyze the scale effect and the influence of Reynolds number when processing the test data, that is, it is impossible to satisfy the condition that all the similarity criteria are equal to the real ship in the ship model test, and only part of the test can be realized. similar, leading to deviations when the model test results are used to estimate the performance of the real ship

[0003] When carrying out hydrodynamic tests such as rapidity and seakeeping in rectangular pools, due to the limitation of the scale of the pool, it will bring many shortcomings to the test: ①The model can only carry out speed tests under head-wave and down-wave conditions in this pool ; ②For larger-scale models, it is necessary to consider the interference of the pool wall on the wave-making reflection of the model in the test; ③The side bridge of the trailer above the model will limit the movement range of the large-scale model, and the speed of the model is usually controlled by the trailer control, while the speed of the trailer has a limited range; ④ If the scale of the model is too small, the difference between the Reynolds number Re of the test and the real ship will be too large, which will seriously affect the measurement accuracy of the test; ⑤ The ability of the wave generator in the pool to simulate waves is limited , the waves created are one-way, pseudo-random, waves generated by push plates, which are quite different from actual waves;

[0004] Carrying out related ship performance tests in a pool not only has a great difference between the test environment and the real wave environment, but also is affected by factors such as the function of the pool wave maker, the size of the pool, and the effect of the pool wall, which will make the measured data different from the research in the real environment. The data are very different, and may even produce diametrically opposite results, seriously affecting the purpose and significance of conducting trials

At the same time, due to the limitation of the tank environment, many constraints and difficulties have been brought to the design of the model, so that many characteristics of the real ship in the test cannot be truly reflected in the tank model test.

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