A large-scale missile on-hook vibration test equipment and method

Abstract

A large-scale missile hanging-on-the-plane vibration test device is composed of a hanging-on-the-plane simulated boundary structure support member, a hanger switch-over device, air spring support systems, a hanger, a hanging-on-the-plane missile, air compressors, laser displacement meters, pressure controllers, vibration tools, bulbs, vertical vibrating tables, horizontal vibrating table mounting bases, horizontal vibrating tables and test bearing bases. The large-scale missile hanging-on-the-plane vibration test device is characterized in that the hanging-on-the-plane missile is mounted on the hanger; the hanger is mounted on the hanging-on-the-plane simulated boundary structure support member through the hanger switch-over device; the hanging-on-the-plane simulated boundary structure support member is mounted on the air spring support systems and the air spring support systems are installed on the test bearing bases; the vertical vibrating tables and the horizontal vibrating tables are connected to the vibration tools through the bulbs; and the vibration tools are used for fixing the hanging-on-the-plane missile.

Description

technical field [0001] The invention relates to the field of structural dynamics, in particular to a multi-point and multi-axis on-hook vibration test system for large missiles. Background technique [0002] For hang-on missiles, they are subjected to aircraft vibration transmission and aerodynamic forces during flight, and will withstand a certain vibration environment, which will affect their structural strength. In order to ensure the safety and reliability of the product, it is necessary to carry out the on-hook vibration environment test and assessment for the products suspended on the aircraft. If the real ground simulation test is passed, the product can be effectively assessed to ensure that it will not be damaged during use, thereby ensuring that the product has sufficient dynamic strength. [0003] In the traditional on-hook vibration test, the test piece is usually fixed directly or fixed on a single vibration table with a frame suspension, and the vibration test...

AI Technical Summary

Problems solved by technology

After the large missile is suspended on the aircraft, its dynamic characteristics will change due to the influence of the aircraft boundary. Due to the excessive mass of the missile, the coupling effect with the aircraft is enhanced, resulting in serious low-frequency dynamic stress and strong boundary effects.

In addition, the frequency of large missiles is relatively low, which is prone to uneven response distribution, which not only affects the thrust, but may also cause partial over-testing

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