Method for measuring torque and shear force of hull model

A measurement method and hull technology, applied in the direction of measurement devices, fluid dynamics tests, machine/structural component tests, etc.

Active Publication Date: 2019-01-04
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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  • Abstract
  • Description
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Problems solved by technology

[0003] In the past wave load tests on ship models, most of them used steel pipe girders to simulate the vertical stiffness of the hull. , oil tankers, etc., the error caused by this measurement method is small, because the shear center of this type of ship is inside the hull, but for container ships, the shear center is located below the bottom plate, and torsional bending and horizontal bending will produce a certain coupling effect , so it is necessary to use a new measurement method to measure the torque on the container ship

Method used

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  • Method for measuring torque and shear force of hull model
  • Method for measuring torque and shear force of hull model
  • Method for measuring torque and shear force of hull model

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Embodiment Construction

[0045] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0046] like figure 1 , figure 2 and image 3 Shown, a kind of hull model torque and shear force measurement method, comprise hull a, described hull a interior is equipped with U-beam b, the internal interval of described U-beam b is installed with a plurality of transverse bulkheads e, described The upper surface of the U-shaped beam b is fixed with a plurality of parallel wooden beams d at intervals by bolts c, and each plate of the U-shaped beam b is pasted with a group of strain gauges;

[0047] The measurement process includes the following steps:

[0048] Step 1: Prepare a Hull a

[0049] Step 2: Make U-beam b,

[0050] Step 3: install the manufactured U-shaped beam b in the hull a, and fix a plurality of parallel wooden beams d at intervals through bolts c;

[0051] Step 4: Make the strain gauges on both sides of the same posi...

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Abstract

The invention relates to a method for measuring the torque and shear force of a hull model, which comprises a ship body, wherein the ship body is internally provided with a U-shaped beam, the internalpart of the U-shaped beam is provided with transverse bulkheads installed at intervals, the upper surface of the U-shaped beam is provided with a plurality of parallel wooden cross beams which are fixed at intervals through bolts, and each board of the U-shaped beam is attached with a set of strain gauges. Data is obtained according to a calculation formula. The method does not need to take the mutual coupling among the vertical bending, the horizontal bending and the distortion of the U-shaped beam into account. No matter what kind of load the U-shaped beam bears, the torque, the vertical shear force and the horizontal shear force can be directly obtained through the shear stress at the middle position of each board distributed on the profile.

Description

technical field [0001] The invention relates to the technical field of ship model wave load testing and testing, in particular to a method for measuring torque and shear force of a ship model. Background technique [0002] Container ships have the characteristics of large openings, and the strength of the hull structure under the action of torque and shear is a problem that ship designers and code makers must consider. The torsional stiffness and torsional vibration frequency of the hull are low, and horizontal and torsional wave shock vibrations may occur under oblique sea conditions. Accurate measurement of hull torque and shear force is the key to the study of hull structural strength and torsional wave shock vibration tests. [0003] In the past wave load tests on ship models, most of them used steel pipe girders to simulate the vertical stiffness of the hull. , oil tankers, etc., the error caused by this measurement method is small, because the shear center of this typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 司海龙胡嘉骏赵南丁军杨骏高阳李政杰
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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