Method for testing and researching motion characteristics of soft rope in eddy current

Abstract

The invention discloses a soft string motion characteristic experimental study method in eddy current, which comprises the following steps of in order to ensure that the motion characteristics of a soft string model and a mass model in simulated flow are similar to those of a soft string model and a mass model under an actual condition, meeting a proposed similarity criterion to be equal; proposing a set of calculation formula for calculating test parameters; for test preparation, comparing the elasticity modulus and density measured by the selected materials with the calculated density and elasticity modulus of the soft string model, finding the materials similar to the elasticity modulus and the elasticity modulus out to be used for manufacturing the soft string model, meeting the geometric similarity during manufacturing, so that the requirement for rigidity and quality similarity of the soft string model and an actual soft string can be met, the qualitative motion characteristics and certain quantitative motion characteristics of the soft string and the mass body can be obtained. The method is used for scale model test research of motion characteristics of all soft strings andmass bodies in eddy current, and reduces the test difficulty, test cost and flight test risks.

Description

technical field [0001] The invention relates to wind tunnel test technology, in particular to a test and research method for the motion characteristics of a soft rope in an eddy current. Background technique [0002] The situation that the flexible rope mass body moves in the eddy current all can occur in many situations, as the parachute cord that stays in the hatch eddy current area after the transport aircraft personnel airborne is just an example. But, the research of this situation is not involved in the open literature, also does not retrieve the technology relevant to the present invention in China Patent Network. The difficulty of this research is that it is very difficult to study the parachute ropes left in the vortex area of ​​the hatch door after the airborne personnel of the transport aircraft mentioned in the above example, using actual scale and under actual conditions. Contents of the invention [0003] The object of the present invention is to provide a k...

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Problems solved by technology

But, the research of this situation does not involve in the open literature, also does not retrieve the technology relevant to the present invention in China Patent Network

The difficulty of this research is that it is very difficult to study the parachute ropes left in the vortex area of ​​the hatch door after the airborne personnel of the transport aircraft mentioned in the above example, using actual scales and under actual conditions.

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