Abstract：The ground 3-D thermal vibration tests can effectively simulate the actual load environment when an aircraft is flying freely, so studying 3-D thermal vibration test technique is particularly critical.Here, a 3-D test system of anti-heat vibration simultaneously satisfying structural stiffness, force transmission and long-term thermal insulation features was designed and constructed.According to the geometric model of the 3-D anti-heat vibration connection system and test conditions, the system’s finite element model was established.The finite element model’s connection boundary was set and adjusted for several times according to test results.Through analyzing test and modal simulation results, the specific connection form of the 3-axis hinged vibration boundary was determined.It was shown that this boundary connection form can simulate a product’s free flight state in sky to the utmost extent.The performance of a contact type high temperature acceleration sensor was studied and verified.3-D control modes within high temperature zone and normal temperature one were studied contrastively.The technical problem to perform multi-dimensional vibration test control in high temperature zones using high temperature acceleration sensors was broken through in China for the first time to realize effective engineering application of 3-D thermal vibration test technique in China.
韩文龙，逯志国，胡彦平，卫国，张群. 三维防热振动连接边界及试验技术研究[J]. 振动与冲击, 2019, 38(15): 115-120.
HAN Wenlong, LU Zhiguo, HU Yanping, WEI Guo, ZHANG Qun. Connection boundary and test technique for 3-D anti-thermal vibration. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(15): 115-120.
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