Overload protective device for strength tension test of structure of thin-wall case of high-speed aerocraft

Abstract

The invention relates to an overload protective device for a strength tension test of the structure of a thin-wall case of a high-speed flying vehicle. The overload protective device comprises a two-way limiting permanent connection pull rod, a one-way limiting flexible connection pull rod, a load transition frame, wherein the first end of the two-way limiting permanent connection pull rod is fixedly connected with the output end of a tension actuating unit; the first end of the one-way limiting flexible connection pull rod is fixedly connected with a loading connect collar; the upper side and the lower side of the load transition frame are respectively provided with a connecting hole; the second end of the two-way limiting permanent connection pull rod penetrates through the connecting hole at the upper side of the load transition frame, and positions where the second end of the two-way limiting permanent connection pull rod is positioned at the upper side and the lower side of the connecting hole at the upper side are respectively limited; the second end of the one-way limited flexible connecting pull rod passes through a connecting hole at the lower side of the load transition frame, and the upper part of the second end of the one-way limiting flexible connection pull rod, which is positioned at the connecting hole at the lower side, is provided with a limiting part, thereby the load transition frame and an one-way limiting permanent connection pull rod only relatively move in a single direction, which provides reliable assurance for the safety of a high-temperature strength control test on the structure of a thin-wall case of the high-speed aerocraft, such as a guided missile, and the like.

Description

technical field [0001] The invention relates to a special anti-overload device, in particular to a protection device for preventing overload applied in the tensile test process of the thin-walled shell structure of high-speed aircraft such as missiles. Background technique [0002] The structural strength test of missiles and launch vehicles needs to reproduce boundary conditions such as load and displacement through ground tests, and measure key structural parameters such as stress, strength and stiffness of structural parts of missiles (arrows). This work is of great significance to verify the rationality and correctness of the structural form, improve the structural design, reduce the structural weight and improve the reliability and safety of the projectile (arrow) structure. [0003] In order to break through the enemy's missile defense system, a hypersonic missile warhead with super maneuverability is required, and it must move along a complex serpentine trajectory dur...

AI Technical Summary

Problems solved by technology

[0005] According to the requirements of load simulation, the actuator 9 must quickly return to zero during the loading process, but due to the high-speed inertial motion of the actuator booster shaft 8 and the fixed connection method of the entire test system, it is very easy to produce Instantaneous pressure overload, resulting in destructive accidents of thin-walled warhead projectiles

Moreover, ceramic or composite material thin-wall warheads are very expensive, and it is necessary to try to avoid the damage of the specimen caused by the small misoperation of the loading system during the test, as well as the resulting test failure and huge economic losses.

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