Constraint system of airplane structure test

Abstract

The invention belongs to a constraint technique of an airplane structure test, and relates to a constraint system of an airplane structure test. The constraint system comprises clamping board sleeving members, stroke-adjustable connecting members, levers, a ceiling constraint beam, a ground fixing device, force bearing beams and common connecting members, wherein upper clamping boards and lower clamping boards of the left and right clamping board sleeving members are connected to and clamped in a front beam part and a rear beam part at the root part of an airfoil through connecting screw rods, and the left clamping board sleeving member and the right clamping board sleeving member are firstly connected with force sensors and then are connected with the stroke-adjustable connecting members; the stroke-adjustable connecting members are connected to the levers; and the left ends, the right ends and the middle sections of the levers are connected to an upper cross beam or the lower ground fixing device through the stroke-adjustable connecting members. According to the invention, the selection on vertical constraint can be implemented, the simple and convenient conversion between single-point constraint and dual-point constraint required in different support modes can be realized, and meanwhile, the influence to heading or lateral constraint by the vertical constraint is alleviated, so that the constraint of a test machine is more reasonable.

Description

technical field [0001] The invention belongs to the restraint technology of aircraft structure test and relates to a restraint system of aircraft structure test. Background technique [0002] In the static test of the aircraft structure, it is usually necessary to support the aircraft to a certain height for the test. The vertical support generally adopts three points of support: the front landing gear is vertical, and the left and right main landing gear are vertical. During the nose landing gear test and the main landing gear test, the vertical restraints are set on other parts or parts of the test machine with higher structural strength, such as the vertical joint of the engine or the fuselage reinforcement frame. The support of landing gear generally adopts crowbar method or two-way differential soft restraint, and the support of other parts with strong structural strength generally adopts two-way differential soft restraint. On the basis of the above-mentioned several...

AI Technical Summary

Problems solved by technology

[0003] For some special testing machines, the bearing capacity of the landing gear and the stronger part of the structure is limited, or the structure deforms greatly after loading and cannot be used as a vertical support

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