Bird impact load testing device and method

Abstract

The invention belongs to the technical field of bird impact load testing, and particularly relates to a bird impact load testing device and method. The device comprises a supporting base, a first elastic component, a bird impact supporting surface, a second elastic component, a compression amount measurement supporting surface, a first chain, a second chain, a gear mechanism and a scale, wherein the supporting base comprises a fixing surface; one end of the first elastic component is fixedly connected with the the upper end of the fixing surface; the other end of the first elastic component isfixedly connected with the upper end of the bird impact supporting surface; one end of the second elastic component is fixedly connected with the lower end of the fixing surface; the gear mechanism comprises two driving gears and a driven gear, the two driving gears are meshed with the first chain and the second chain respectively, and the driven gear is meshed with the two driving gears at the same time; and the scale is fixedly connected with the fixing surface of the supporting base, and a colored coating is arranged on the contact surface of the compression amount measuring supporting surface and the scale and used for calibrating the distance.

Description

technical field [0001] The invention belongs to the technical field of bird strike load testing, and in particular relates to a bird strike load testing device and method. Background technique [0002] The bird strike load test is mainly used in the bird strike test of aviation aircraft. For the bird strike load test of the structure, the main method is to paste the piezoelectric sensor on the structure to be hit. Piezoelectric sensors include PVDF pressure sensors, quartz pressure sensors, and piezoelectric ceramics. [0003] The polarization direction and force of PVDF film are as follows: figure 1 , the impact force test circuit setting of PVDF film in bird strike see figure 2 , where the first attenuation circuit is to ensure that the output voltage of the PVDF film does not exceed the operating voltage of the following circuit. The second attenuation circuit is to ensure that the output voltage does not exceed the range of the transient waveform recorder. The PVDF ...

AI Technical Summary

Problems solved by technology

This type of sensor cannot be used for static measurement, because the charge after the external force can only be preserved when the circuit has an infinite input impedance, but the actual application situation is not like this, so it is determined that this type of piezoelectric sensor can only be used Measuring stress while in motion

Piezoelectric crystals and piezoelectric ceramics are brittle materials, which have certain limitations in high-pressure tests, especially tests under impact conditions

Images