Abstract
The life and damage of hemispherical resonator are important factors that directly affect the service time and safety of high‐precision hemispherical resonator gyro. However, the fused silica glass material used in the hemispherical resonator which was processed in China is mainly imported, and it is too expensive to use the traditional fatigue life experiment, so it is necessary to use the software of fatigue life analysis to analyze its fatigue life. In the paper, the ANSYS software is used to analyze the fatigue life of fused silica hemispherical resonator, to determine the dangerous parts caused by the residual stress to analyze the crack propagation in the fatigue parts, and to obtain the sum stress intensity factor, so as to effectively monitor and prevent the fatigue‐prone parts in the process of structural design and use of the hemispherical resonator.
Highlights
Hemispherical resonator gyroscope (HRG) has been widely used and paid attention to in the field of inertial technology at home and abroad due to the performance optimization of HRG [1]
The core component of HRG is hemispherical resonator which was made of fused silica glass
The basic shape is a thin-walled hemispherical shell fixed by a cylindrical support rod in the pole area, and it is hemispherical elastomeric, which makes the bending energy storage of each gram of resonator material reach the maximum value [5]
Summary
Hemispherical resonator gyroscope (HRG) has been widely used and paid attention to in the field of inertial technology at home and abroad due to the performance optimization of HRG [1]. The isotropic material is the basis of HRG with high quality, and the HRG with high-precision spherical shell structure is the core technology [2]. The ideal material of hemispherical resonator is fused silica glass [3]. According to the research and development of the fused silica glass in China, as well as the research results and experience of hemispherical resonator processing technology at home and abroad, combined with the technical bottleneck of fused silica glass in ultraprecision machining of complex curved surface, it is necessary to consider the resonator processing technology, resonator quality factor test, frequency difference test, material uniformity, and coating technology as a system engineering to study [4]
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