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Aerostat modal testing method and system

A modal test and aerostat technology, which is applied in the testing of machines/structural components, vibration testing, measuring devices, etc., can solve problems such as structural damage and capsule structure damage, and achieve the effect of avoiding resonance

Inactive Publication Date: 2016-11-16
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

This kind of resonance has great damage to the structure, and can even directly lead to the destruction of the capsule structure

Method used

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  • Aerostat modal testing method and system
  • Aerostat modal testing method and system
  • Aerostat modal testing method and system

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] Modal testing and analysis is an effective way to study structural vibration. In the test process, firstly, the structure to be tested needs to be artificially excited in a static state. By measuring the exciting force and response and analyzing it, the transfer function between any two points can be obtained, and the test can be carri...

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Abstract

The invention relates to the technical field of aerostat modal tests, in particular to an aerostat modal testing method and an aerostat modal testing system. The aerostat modal testing method at least comprises the steps of: lifting and suspending an aerostat in an enclosed space; respectively selecting a nose cone position and a nacelle position of the aerostat as excitation points; dividing the aerostat into a plurality of cross sections; arranging a plurality of sensors on each cross section; exciting the excitation points at the nose cone position and the nacelle position respectively; and acquiring an excitation signal and a vibration signal generated during the excitation process. The aerostat modal testing system at least comprises an exciter, sensors, an acquisition instrument and a computer. The aerostat modal testing method and the aerostat modal testing system are used for determining the inherent frequency and vibration mode of the aerostat so that the aerostat can avoid resonance during the design process, and making clear of the responding situations of the aerostat to different dynamic loads.

Description

technical field [0001] The invention relates to the technical field of modal testing of aerostats, in particular to an aerostat modal testing method and system. Background technique [0002] Aerostats are lighter-than-air aircraft based on balloons and airships. Balloons are unpowered aircraft. They are usually divided into high-altitude balloons and tethered balloons according to their structure and whether they have mooring devices. The airship is a kind of aerostat with a propulsion device, which can independently provide forward power. According to the structure type, it can be divided into soft airship, rigid airship and semi-rigid airship. The basic structure of the aerostat consists of a nose cone, a capsule, an empennage, an equipment pod and a tether. The nose cone is an important load-bearing component when the aerostat is moored on the ground; the bladder is mainly used to fill the gas lighter than air to provide lift for the aerostat, and it is also the most typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 何泽青宋林付强秦玉梅张冬辉
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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