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Three-axis turntable is a key equipment for missiles or aircraft and ground loop simulation , which can simulate the movement of aircraft in the space in the roll , pitch , yaw attitude , widely used in the aviation, marine, defense , construction field . As a high precision motion simulation equipment , the mechanical properties of the turntable sets directly affect its dynamic simulation accuracy . Therefore, the analysis is very important in the design stage of the mechanical properties of the turntable platform body . In this paper, the theory of finite element analysis , mechanical analysis of the mechanical structure of the three-axis motion simulator , and structural improvements are proposed based on the analysis results . Firstly, according to the turntable mechanical structure analysis, finite element model to facilitate the establishment of a turntable , turntable various structural components to simplify and equivalent , then take advantage of the large general-purpose finite element analysis software ANSYS finite element model of the turntable . Secondly , on the turntable calculation of static and dynamic characteristics . Static analysis , the turntable load equivalent concentrated load evenly applied to the corresponding node on the finite element model to the turntable static deformation and stress results . Dynamic analysis , the load on the turntable is seen as lumped mass processing equivalent to the corresponding position of the finite element model , obtained by calculating the turntable of the natural frequencies and modes . Finally , based on the the turntable static and dynamic characteristics analysis results , the proposed improvement program of the frame , the inner frame and the base structure . And improvement program for the analysis and calculation , ensure improved structure meet the the turntable static and dynamic characteristics of the requirements .
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