A test device and test method for impact dynamics characteristics of an inflatable flexible structure

Abstract

The invention discloses an impact dynamic characteristic test device and test method of an inflatable flexible structure. An impact velocity value of the flexible structure is measured by a photoelectric sensing velocity-measuring system. An impact resultant force-time history curve of an impact process of the flexible structure is measured through a force-measuring platform. An accelerated speed-time history curve of the impact process is measured through an acceleration sensor which is adhered to the flexible structure surface and next to an impact region. An impact deformation process of the flexible structure is recorded by a high speed camera. Photoelectric signals, acceleration signals, and force signals are all transmitted to a data collection analyzer and converted to electronic signals through the data collection analyzer and input to a computer. The computer performs digital-to-analogue conversion on the signals to obtain a whole dynamic characteristic curve of a test object, and records the whole impact deformation process shot by the high speed camera. Thus the impact dynamic characteristic test device and test method of the inflatable flexible structure can provide verification and reference for the impact dynamics numerical simulation of the inflatable flexible structure. The structure device is simple and clear, is convenient to use, and has strong applicability.

Description

technical field [0001] The invention relates to the field of impact test and measurement of inflatable flexible film structures, specifically a test device and method for testing the impact dynamics of an inflatable flexible structure, which is used to study the impact dynamics and deformation characteristics of the above structure, and can be used for Instruct and verify the finite element numerical simulation analysis of the above structure. Background technique [0002] Since the beginning of the 21st century, with the rapid development of airship design technology and material technology, the stratospheric airship platform has received extensive attention and in-depth research from all over the world. Compared with other aircraft, the stratospheric airship platform has its unique characteristics: the lift is mainly provided by static buoyancy rather than aerodynamic lift; due to the low atmospheric density in the stratosphere, the airship is bulky, so the inertia is larg...

AI Technical Summary

Problems solved by technology

However, the experimental research on the impact dynamic characteristics of inflatable flexible membrane structures is still very limited, and it is difficult to verify the credibility and accuracy of the numerical simulation results. Simple, effective and easy-to-operate test device and test method for testing

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