Underwater vibration excitation assembly

A combination device and excitation technology, which is applied in the direction of measuring device, vibration test, machine/structural component test, etc., can solve the problems of large differences in structural modes, random selection of excitation parts, and inability to directly respond to vibration characteristics. Achieve the effects of simple installation, high debugging and maintainability, and convenient maintenance

Pending Publication Date: 2019-11-12
NO 719 RES INST CHINA SHIPBUILDING IND
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Problems solved by technology

However, this work is often carried out in the state of the ship’s pier, because the structural mode difference between the dry state and the external attached water state is relatively large, so the test results cannot directly reflect the vibration characteristics in actual sailing
For model testing, the vibrator is generally arranged inside the model, but due to the limitation of free space inside, it is impossible to choose the excitation part at will according to the test needs

Method used

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  • Underwater vibration excitation assembly

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Embodiment Construction

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0018] The embodiment of the present invention is an underwater excitation combination device, which is composed of two parts: the vibration excitation device and the underwater pressure-resistant device, wherein the vibration excitation device is composed of the following components: vibration exciter 1, excitation rod 2, spring rope 3, Cable 7, the underwater pressure-resistant device is composed of the following components: device pressure-resistant housing 4, device pressure-resistant sealing plate 6, cable stuffing box 8, and fastening bolts 9. Wherein, the pressure-resistant housing 4 of the device is fixed on the component under test 5, and the pressure-...

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Abstract

The invention provides an underwater vibration excitation assembly. The assembly comprises an exciter, a vibration excitation rod, a spring rope, a pressure-resistant device shell, a pressure-resistant device seal plate and a cable, wherein the pressure-resistant device shell is fixed on a component under test; the pressure-resistant device seal plate is installed on an opening of the pressure-resistant device shell to form a closed space; the exciter is positioned in the closed space, and is flexibly connected with the pressure-resistant device shell via the spring rope; one end of the vibration excitation rod is fixed at the head of the exciter, while the other end is close to the component under test; the cable is connected with the exciter after penetrating through the pressure-resistant device shell and the pressure-resistant device seal plate. When a ship is in an underwater state, the assembly fully uses an external space and selects an ideal vibration excitation part to conductan underwater vibration performance test of a model, and thus the debugging convenience of a test system and the accuracy of a test result are improved.

Description

technical field [0001] The invention belongs to the technical field of ship vibration and noise testing, and in particular relates to an underwater excitation combination device. Background technique [0002] At present, the vibration and noise reduction of ships has received extensive attention and attention. Due to the large number of internal equipment and complex pipelines of ships, it is difficult to analyze the vibration characteristics of ships through theory and calculation. Therefore, the test is to carry out ship vibration An important means of characteristic research. [0003] In the actual work of testing the vibration characteristics of ships, it is one of the important testing tasks to test the structural characteristics of ships by means of exciters. However, this work is often carried out in the state of the ship’s pier. Due to the large difference in the structural mode between the dry state and the external attached water state, the test results cannot dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 刘翱孙国仓华如南郑国垠黎雪刚钱大帅
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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