| Lead by prof. DING , The AMS-02 (Alpha Magnetic Spectrometer 02) project is an international cooperative project, whose key equipment, Alpha Magnetic Spectrometer, will be installed oh the International Space Station, and under the specific environment of the outer space, be used to do physical experiments on particles. The performance of the particle physical detectors, installed on the Alpha Magnetic Spectrometer, depends largely on the thermal environment surrounding them. To guarantee these detectors to normally operate in the outer space, thermal control system is very essential and indispensable to AMS-02, whose normal operating, on the other hand, is based on certain supporting structures. Thus, the designing of these structures is very important. Not only does it have to meet the functional needs of AMS-02, but also it has to meet the designing requirements of spacecrafts, launching requirements of spacecrafts and installing and applying requirements in the station. Therefore, this paper will study the structures of AMS-02 thermal control system. The main contents are as follows:Firstly, analyzing the problems coming up in the manufacturing and assembling of the original structures of AMS-02 thermal control system, we have found that they were all due to the bottom (dispersed) design method. According to the current trend of aerospace structure designing, we have proposed redesigning and modifications to the AMS-02 Thermal Control System structures based on the integrated designing method.Secondly, static analysis for the newly designed structures based on the software of ANSYS was performed to obtain information about stresses and deformations. Through using of the information, the newly designed structures were structurally optimized to meet the intension requirements basing on as least weight as possible.Thirdly, modal testing on the top brackets was performed to obtain their vibrating frequencies and modes, which were used to validate the results of the finite element method. Then, the inner product correlation of the theoretical and experimental results was calculated using MATLAB, whose purpose was to verify the dependability of the finite element model and its results. On the basis of these, the other critical components were modeled and their modal characteristics were analyzed.Lastly, Based on the problems coming up in the assembling of FEM component models, MPC184-unit was chosen to simulate the bolt coupling, and solved the critical technical problem-bolts coupling. Besides, A comprehensive study of the stress, deformation and vibration conditions of the structures under three typical working conditions was carried out, and a safety margin calculation was performed for the position with the largest concentration stress. |
