Portable thermal loading device for temperature-acceleration composite environment test

Abstract

The invention discloses a portable thermal loading device for a temperature-acceleration composite environment test, comprising a radome having one end open and the other end closed, electric heating membranes and a fan. The radome is in connection with a centrifuge arm through main body bolts; a testpieces is installed on the centrifuge arm through a table top, and is located in the radome; in the radome, a thermal insulation layer is arranged between an outer wall and an inner wall; a plurality of electric heating membranes are uniformly bonded on the inner wall; the fan is installed on the inner wall and is close to the inner bottom center, and the air supply direction just faces the inner bottom center of the inner wall. The portable thermal loading device employs bonded electric heating membranes to realize heating, thereby synchronously controlling the temperature and acceleration, and improving the simulation capability of a temperature-acceleration composite environment test; the radome is of a three-layer structure, thereby reducing the overall mass, and improving insulation effects; the radome is internally provided with the fan, thereby improving the temperature uniformity and the convection heat exchange efficiency of a heating source.

Description

technical field [0001] The invention relates to a device for temperature-acceleration composite environmental test, in particular to a portable thermal loading device for temperature-acceleration composite environmental test. Background technique [0002] High-speed aircraft such as missiles, spaceships, space shuttles, etc. are affected by various environmental factors such as acceleration and temperature during the high-speed flight stage. On the one hand, acceleration will generate inertial force, causing aircraft, spacecraft and onboard products to appear overweight, and different parts of the structure will present different stress levels. On the other hand, under different temperature environments, the thermal expansion properties of the material itself will cause new stresses inside the structure. The result of the joint action of these two stresses will change the dynamic characteristics of the structure, and the local stress level may also be significantly differen...

AI Technical Summary

Problems solved by technology

First of all, after the centrifuge is started, the temperature inside the fairing will inevitably decrease gradually with time due to the withdrawal of the hot air device, and cannot remain stable; secondly, due to the rotation of the centrifuge, the uniformity of the temperature field inside the fairing will be significantly reduced ; Third, since there is no heating control measure during the test, the method cannot simulate the temperature rise of the test piece caused by aerodynamic heat during flight

[0007] The root cause of the above-mentioned shortcomings is that the temperature loading is an offline method, and it is impossible to achieve simultaneous temperature control and acceleration control, which is also the problem to be solved by the present invention

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