Multi-point excitation type airplane load model testing device and application method thereof

Abstract

The invention relates to a novel airplane load model testing device, in particular to experimental study on real-time dynamic response and long-term operation settlement rule of a runway. The effects on roads caused by different conditions such as airplane landing, sliding and take-off can be simulated and predicted in a multipoint vibration loading manner; static load simulation tests, take-off and landing load dynamic simulation tests and smooth reciprocating fatigue tests of the runway can be finished; a support is provided for construction of the runway; and meanwhile, the testing device can also be applied to mechanical property tests of a building structure.

Description

technical field [0001] The invention relates to a novel aircraft load model test device, which is a model test device used for studying the real-time dynamic response of an aircraft runway and the settlement law of long-term operation. Background technique [0002] Before the present invention, in the experimental research on the dynamic response and settlement law of the aircraft runway, it was a common method to replace the aircraft load with the general traffic load to carry out the indoor soil unit dynamic model test, and to verify the existing runway design scheme . The indoor soil unit dynamic model test is mainly carried out on equipment such as a moving triaxial instrument and a hollow cylinder torsion instrument. The research objects of these tests are all soil samples. By analyzing the dynamic characteristics of soil sample units, the mechanical characteristics and deformation laws of the airstrip roadbed under the action of aircraft loads are indirectly studied. ...

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Problems solved by technology

This kind of test method is relatively indirect, and the test conditions are relatively ideal, which is different from the actual stress situation of the roadbed of the aircraft runway, which causes a large difference between the experimental research results and the actual measurement results.

Moreover, most of the above experimental studies are simulations of general traffic loads, such as high-speed railways, highways, etc., and their load forms cannot reflect the low-frequency and high-amplitude characteristics of aircraft loads, nor can they reflect the superposition of aircraft landing gear and wheel loads. The impact of the impact and the impact of acceleration and deceleration

In terms of field test research, due to the requirements of aircraft operation safety, it is impossible to set up test instruments on the runway during operation to monitor the dynamic stress changes and settlement deformation of the runway subgrade in real time

The current field test is still in the verification stage of the runway design and construction plan. The research object is the runway that is under construction and has not yet been operated. Static load and foundation treatment tests are often carried out to provide parameters for the design and construction of the runway. , the whole process of working behavior data, it is impossible to make accurate and in-depth analysis of its dynamic response and long-term settlement law

[0003] In short, there are very few experimental studies on the reasonable simulation of aircraft loads considering the pulse characteristics, especially the lack of consideration of the impact of different load conditions such as aircraft landing, taxiing, and take-off on the development process of dynamic stress and dynamic strain in soil. However, this is precisely the research The real-time dynamic response of the airstrip under the action of the aircraft load and the long-term operation settlement law are the key to predicting the service performance of the airstrip and providing a scientific basis for the design and construction of the airstrip

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