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| Stability Design Improvement of Laser-device Platform Based on Dynamic Numerical Simulation |
| Received:March 02, 2020 Revised:April 05, 2020 |
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| DOI：10.7643/issn.1672-9242.2020.07.004 |
| KeyWord:random vibration relative displacement angle displacement finite element numerical simulation |
| Author | Institution |
| HU Jie |
Institute of System Engineering, CAEP, Mianyang , China;Sichuan Key Laboratory of Engineering Material and Structure Impact and Vibration, Mianyang , China |
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| Abstract: |
| The paper aims to estimate whether the stability of the initial design scheme for a certain optical platform under random vibration meets the design index, and propose effective improved design schemes. Based on the theory analysis of structure relative displacement response suffering random excitation, the relative deformation calculation method under dynamic load was established, and the angle response to mirror was analyzed through finite element numerical simulation. The estimation result of original scheme indicated that the angle displacement of mirror exceeded the requirements of less than 10 μrad because the overall bulge and bending mode shape of the structure were activated. It was proposed to add bolt connection to change the dynamic characteristic of structure to enhance the stiffness of the structure and improve the flatness of the mounting platform. The numerical simulation result of improvement measure indicates that with the increase of mount bolt on baseboard, the flatness of the mounting platform is enhanced effectively, and the angle displacement of the mounting platform is reduced obviously to 3.4 μrad, which matches the design requirement. |
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