Loading system and method for airplane structure test

Abstract

The invention belongs to an airplane testing technology and relates to a loading system and method for an airplane structure test. The loading system for the airplane structure test comprises a loading force-bearing system, a loading cross beam, a guide fixed pulley, a movable pulley set, a loading connecting member, a first force sensor, a second force sensor and a loading actuating cylinder, wherein the loading cross beam is arranged on the loading force-bearing system, the guide fixed pulley is fixed on the loading cross beam, the movable pulley set is arranged on the top end of the loading actuating cylinder, the loading actuating cylinder is fixed on a force-carrying terrace, and the loading connecting member surrounds the movable pulley set and the guide fixed pulley. According to the invention, a large-deformation part of a structure in an airplane structure static and fatigue test is loaded; by using a method for increasing a load by the actuating cylinder by the small-travel actuating cylinder, the retracting travel of a loading device is reduced; and under the condition of large deformation of the structure, the accuracy of deflection angle loading is ensured.

Description

technical field [0001] The invention belongs to aircraft test technology, and relates to a loading system and method for aircraft structure test. Background technique [0002] In the past, when the static and fatigue tests of the aircraft structure were loaded, the maximum deformation of the structure was usually 1m to 1.5m, so the maximum stroke of the loading cylinder was 1.5m; if the structural deformation was greater than 1.5m, two cylinders in series way to load. [0003] With the improvement of aircraft structure design concept and the improvement of material performance, the structural flexibility increases, and the large aspect ratio and long straight wings of large aircraft often make the maximum deformation of the structure often exceed the loading stroke of the existing equipment, which brings The deflection angle loading problem of the preset actuator due to deformation in the test. Continuing to use the test loading method of series actuators not only increase...

AI Technical Summary

Problems solved by technology

[0003] With the improvement of aircraft structure design concept and the improvement of material performance, the structural flexibility increases, and the large aspect ratio and long straight wings of large aircraft often make the maximum deformation of the structure often exceed the loading stroke of the existing equipment, which brings The deflection angle loading problem of the preset actuator due to deformation in the test

Continuing to use the test loading method of series actuators will not only increase the installation workload, but also increase the difficulty of test control; while the design and use of large-stroke actuators will not only increase the height of the loading and bearing system, but also greatly increase the test cost.

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