Static-thermal-acoustic combined environmental test of aerospace vehicles
Reusable aerospace vehicles are an important development direction in the aerospace field,and in the process of launch,cross-domain flight or reentry,they experience harsh combined service environments,such as,aerodynamic,thermal,vibration,acoustic loads etc.The new test requirements are required for reusable performance verification and life assessment.In recent years,significant progress has been made in thermal strength,thermal-vibration,thermal-acoustic,high temperature measurement and other aspects.Based on the research basis of thermal-acoustic environmental test,static loads are applied by a set of electric cylinders and a static-thermal-acoustic combined environmental test is proposed.Test results show that the vibration of stiffened plates induced by acoustic load can cause a large decrease of the static load.When the position of the statically loaded end remains the same,the heating can also cause a large increase of the static load.The static-thermal-acoustic combined environmental test of thin-walled plate is carried out successfully,which can provide technical supports for the establishment of a reusable test system for aerospace vehicles and the assessment of the performance of thermal protection structures.
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