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A shear strain-based test system and identification method for bow ice load

A load identification and testing system technology, applied to ships and other directions, can solve the problem of high error level

Active Publication Date: 2021-11-19
DALIAN UNIV OF TECH
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Problems solved by technology

[0006] "Kong Shuai, Cui Hongyu, Ji Shunying. Research on actual ship measurement and inversion method of sea ice load on ship structure. Vibration and Shock, 2020,39(20):8-16.", the far-field identification used in this document In the method, the recognition area is far from the waterline, and the support vector machine method adopted is based on a mathematical regression model rather than a physical model, so the error level of the measured results is relatively high

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  • A shear strain-based test system and identification method for bow ice load
  • A shear strain-based test system and identification method for bow ice load
  • A shear strain-based test system and identification method for bow ice load

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Embodiment Construction

[0041] The structure, operation process, testing process and implementation examples of the present invention will be further described below in conjunction with the accompanying drawings.

[0042] figure 1 and figure 2 It is a side view and a top view of the test area of ​​the array type resistance strain gauge in the present invention. Among them, 1-3 unbroken sea ice collides with the bow and becomes 1-1 broken sea ice. The hull mainly bears the ice load from the bow to the hull transition area, so this position becomes a 1-2 array resistor The area where the strain gauge is located; in addition, the horizontal center of the 1-2 array resistance strain gauge is located at the 1-4 waterline.

[0043] image 3 It is a schematic diagram of the installation of the resistance strain gauge at each measuring point in the array resistance strain gauge. Two resistance strain gauges are installed on each measuring point, the 2-1 resistance strain gauge 1 and the 2-2 resistance s...

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Abstract

The invention belongs to the technical field of sea ice testing, and relates to a bow ice load testing system and identification method based on shear strain, which is suitable for polar ships with straight bows. In the test system, the arrayed resistance strain gauge is connected to the dynamic data acquisition instrument, and the dynamic data acquisition instrument is connected to the server for data processing, and the results are displayed on the display screen. Among them, the array resistance strain gauge adopts the double-plate shear strain measurement method, which consists of 4 rows and 10 columns of strain measurement points. The strain characteristics of the bow under the action of sea ice are tested by the ice load test device, and then the strain signal is converted into ice load data by the ice load identification method. The invention has the advantages of simple structure and convenient use, and can realize high spatial resolution and high-precision identification of bow ice load characteristics of ships navigating in ice regions.

Description

technical field [0001] The invention belongs to the technical field of sea ice testing, and relates to a bow ice load testing system based on shear strain, in particular to an ice induced strain characteristic testing method for a full-scale ship structure and a corresponding load identification method. Background technique [0002] Sea ice is the main environmental threat faced by ships navigating in ice regions. The collision between the hull and sea ice can form a large ice load on the ship during navigation. The ice load can deform or even destroy the hull, and at the same time, it can form a large resistance and affect the dynamic performance of the ship. Therefore, testing the ice loads on ship structures can help improve the safety of ships navigating in ice regions. [0003] Known documents include: [0004] "A Dynamic History Visualization Method for Fine Test Data of Hull Ice Load CN201610967897.4", this invention mainly provides a visualization model of hull ice...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B79/00B63B79/10
CPCB63B79/00B63B79/10
Inventor 陈晓东崔洪宇季顺迎
Owner DALIAN UNIV OF TECH
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