Three-directional load experiment system for airport pavement

Abstract

The invention provides a three-directional load experiment system for an airport pavement. The three-directional load experiment system comprises three sets of electro-hydraulic servo actuators, a horizontal bearing rack, a low-friction movement mechanism and a double-wheel testing device, wherein two solid tyres on the double-wheel testing device are fixed by a wheel shaft at the lower end of inner loading framework equipment; the top of the inner loading framework equipment is connected with an outer framework by an equipment guide rail; vertical and lateral 50kN electro-hydraulic servo actuators are arranged at the top and the side face of the outer framework; a loading end penetrates through the outer framework and is fixedly arranged on the inner loading framework equipment; the outer framework is located on a linear guide rail of the low-friction movement mechanism through a guide rail movement part arranged at the lower part; a 100kN horizontal electro-hydraulic servo actuator is fixedly arranged on a transverse beam between two horizontal counter-force inclined supports on the horizontal bearing rack and a loading end of the 100kN horizontal electro-hydraulic servo actuator acts on the outer framework of the double-wheel testing device. The three-directional load experiment system is used for simulating undercarriage loads and impacts, and circulating loads which are borne by the airport pavement in takeoff, landing, sliding and swerving processes of airplanes.

Description

Technical field: [0001] The invention relates to an airport runway loading experiment system, in particular to an airport runway experiment system for simulating three-directional loads, and belongs to the technical field of transportation engineering. Background technique [0002] In recent years, with the rapid development of my country's economy, the density of airport construction has gradually increased. In order to better test the mechanical properties of the airport runway subgrade pavement, the airport runway loading experiment system may be indispensable. [0003] The current laboratory airport runway loading test systems in China include the ALF system of the Ministry of Communications, the airport pavement loading system of the Air Force Engineering University, and the linear accelerated loading test system of Changsha University of Science and Technology. The ALF system simulates the movement of the aircraft by its own movable vehicle, and the horizontal power i...

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Problems solved by technology

The ALF system simulates the movement of the aircraft by its own movable vehicle, and the horizontal power is provided by the vehicle itself. The vertical load is a fixed configuration, and no lateral shear force can be applied to the road surface; the loading system of the Air Force Engineering University consists of a complete aircraft landing gear The load is applied on the airport pavement, the vertical load can be changed, but the horizontal direction cannot be moved, and the test can only be performed at a fixed point and the lateral shear force cannot be applied to the airport pavement; the accelerated loading test system of Changsha University of Science and Technology is a self-made equipment vehicle Freely slide down from a high place at one end of the track to obtain a traveling speed to realize the function of loading the road surface while the equipment is traveling. The vertical load is a fixed configuration, which is the weight of the equipment vehicle, and its forward speed is determined by It is converted from gravitational potential energy, which cannot be controlled during travel, and it also cannot exert lateral force on the road surface

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