Military equipment solar radiation test

Unlike the thermal effects produced by high temperatures, the thermal effects of solar radiation are directional and produce thermal gradients. In solar radiation tests, the absorption or reflection of heat mainly depends on the roughness and color of the radiated surface. Changes in solar irradiance cause different materials and components to expand or contract at different rates, creating severe stresses and damaging structural integrity.
The main effects of direct solar radiation on equipment include: stuck or loose moving parts, reduced strength of welded and glued parts, changes in strength and elasticity, inability to calibrate or malfunction of linkage devices, damage to sealing integrity, changes in electrical or electronic components, premature action of electrical contacts, changes in the performance of synthetic rubber and polymers, discoloration of fabrics and plastics, deterioration of natural rubber and synthetic rubber, etc.
The solar radiation test of military equipment can measure the solar radiation test environmental adaptability of various military equipment and determine the thermal and photochemical effects of direct solar radiation on the equipment.
Zhongke Testing Reliability Experiment Center has the capabilities of climatic environment testing and mechanical environment testing of various military equipment, and provides professional solar radiation testing services for military equipment.

Equipment directly exposed to solar radiation in hot seasons, such as military electronic computers, auxiliary aircraft, service ships, military surveying and mapping equipment, meteorological support equipment, military vehicles and camouflage equipment, etc.

1. Cycle test
Focusing on the thermal effect produced by solar radiation, the specimen is exposed to the simulated actual maximum magnitude of solar radiation in the world, and 24 hours is a cycle.
2. Steady state test
Focusing on accelerating the photochemical effects produced by solar radiation, the specimen is exposed to an enhanced solar radiation load (approximately 2.5 times the normal magnitude), which is also a cycle of 24 hours. Each cycle contains a 4-h radiation-free period to accelerate the photochemical effects that take a long time to accumulate under normal solar radiation loads.
The actual acceleration rate produced is related to the characteristics of the material. Exposure to 2.5 times the natural solar radiation load will not necessarily provide 2.5 times acceleration results, but if the failure mechanism produced by the test is the same as that expected in the real environment, then this procedure is a faster test.

GJB150.7A-2009 Military equipment laboratory environmental test methods Part 7: Solar radiation test
GJB150.1A-2009 Military equipment laboratory environmental test methods Part 1: General requirements
GJB150.3A-2009 Military equipment laboratory environmental test methods Part 3: High temperature test
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