A test device for testing the wave characteristics of artificial periodic hull girder

Abstract

The invention belongs to the technical field of ships and marine engineering, and in particular relates to a test device for testing the wave characteristics of artificial periodic beams. The invention has a wide range of applications, and is different from general periodic structures that are simulated by setting damping sheets or damping layers on the beam plate. Hull plate frame of transverse bulkhead, beam and other structures. The invention utilizes uniformly distributed holes on the longitudinal beam and the bottom plate to conveniently adjust the distance between the beams and the boundary conditions, change the parameters such as the mass and stiffness of the spring mass vibrator of the artificial period beam, and truly realize the measurement of various artificial period hull girders with a set of devices purpose of the structure. At the same time, different materials, such as aluminum alloy, copper alloy, etc., can also be used to measure the wave characteristics of other similar artificial periodic beams containing cross structures. The invention has the advantages of simple structure, convenient operation and low manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of ships and marine engineering, and in particular relates to a test device for testing the wave characteristics of artificial periodic beams. Background technique [0002] The artificial periodic structure is composed of some identical structural units connected in the same way. It has an important wave characteristic, that is, when the elastic wave propagates in the periodic structure, vibrations in certain frequency ranges cannot pass through, which is called band Gap. The experimental device for the wave characteristics of the artificial periodic hull girder can test the band gap characteristics of the beam structure, which is helpful for the acoustic design of the structure. It suppresses the propagation of vibration and has the effect of damping vibration, so this test device has a wide range of application backgrounds. [0003] The principle of the test is to simulate the artificial periodic hull gi...

AI Technical Summary

Problems solved by technology

For the actual complex structure such as the hull plate frame, its damping coefficient is difficult to determine, so the traditional methods are mostly limited to theoretical research; in addition, the test of the wave characteristics of the hull girder should be easy to change different parameters, measure multiple times, and be easy to operate. Usually, when measuring multiple different plate frames, each plate needs to be welded separately, which not only takes time to process, but also requires high test funds. There are few test devices suitable for testing the fluctuation characteristics of hull girders that are suitable for the above characteristics

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