In order to research the performance of mechanically dithered Ring Laser Gyroscope(RLG) against the dynamic environment

the random vibration analysis is presented. The analysis method of structural random vibration response by the base excitationis described. The finite element model of mechanically dithered RLG is established and its modal analysis is performed by the finite element software ANSYS. It has been proved by the experiments that the model is reasonable and accurate

and the calculate error is less than 7%. The responses on axial and transversal random vibrations of mechanically dithered RLG are analyzed with the finite element model and the experiments and analysis results are compared. By analyzing the Power Spectrum Density (PSD) of acceleration response

the random vibration characteristic of mechanically dithered RLG is assessed. By analyzing the weakness of the present structure

an anti-vibration suggestion is put forward

which is useful to improve the structure design and reform for the further development of RLG.