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风载对光学天文望远镜结构和镜面的作用将直接影响望远镜的面形精度和跟踪指向控制,从而降低望远镜的像质。特别是未来大型望远镜越来越多地采用主动光学技术,风载的作用将是影响主动光学子镜的主动控制及望远镜整体性能的重要因素。回顾了大型望远镜风载作用的分析方法和随机风载的性质,详细介绍了采用风速功率谱密度方法进行随机风载分析的过程和采用有限元方法分析建模的方法;建立了一个拼接镜面主动光学望远镜的完整计算模型,研究了子镜及望远镜整体在风载作用下的静态和动态响应,并分析了风载对镜面面形和望远镜的跟踪指向精度的影响。
Wind load on the optical telescope structure and the role of the mirror will directly affect the telescope surface accuracy and tracking control, thereby reducing the telescope image quality. In particular, the future of large telescopes more and more active optical technology, the role of wind load will affect the active optical sub-mirror active control and the overall performance of an important factor in the telescope. Reviewing the analysis method of large-scale telescopic wind load and the property of stochastic wind load, the process of stochastic wind load analysis using wind power spectral density is introduced in detail and the method of modeling by finite element method is established. A mosaic mirror active Optical telescope, the static and dynamic responses of the whole sub-mirror and the telescope under wind loads are studied, and the influence of wind load on the tracking accuracy of the mirror-shaped surface and the telescope is analyzed.