高功率激光驱动装置中靶场单元结构稳定性研究
文献类型：学位论文
| 作者 | 黄宏彪 |
| 学位类别 | 博士 |
| 答辩日期 | 2009 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 朱健强 |
| 关键词 | ICF 高功率激光驱动器 结构稳定性 有限元方法 参数优化 |
| 其他题名 | Stability Study of Elements of Target Area in High Power Laser Driver |
| 中文摘要 | 首先，本文详细地阐述了结构稳定性的基本理论，提出了影响结构稳定性的几个重要结构特性参数，并给出了提高结构稳定性的解决方案。另外，针对神光II升级装置的工作特点，详细地阐述了影响打靶精度的主要因素。 其次，本文应用有限元分析方法对ICF靶室系统进行了模态分析，找出了ICF靶室系统的薄弱环节，并针对薄弱环节进行了结构稳定性方面的研究，分析了ICF靶室壁厚、支撑脚安装角度和加强筋空间位置参数与固有频率之间的变化规律，根据变化规律找出了优化参数值；分析了增加系统的阻尼特性对结构稳定性能的影响，最后根据神光II升级装置对ICF靶室系统中打靶透镜的动态稳定性要求，给出了ICF靶室系统的稳定性方案。 第三，本文应用有限元方法对靶场桁架系统进行了模态分析，找出了靶场桁架系统的薄弱环节，并针对薄弱环节进行了结构稳定性方面的研究，给出了提高靶场桁架系统结构稳定性的几点措施，并分析了靶场桁架系统中加强筋的空间安装位置参数与固有频率之间的变化规律，根据变化规律找出了优化参数值。最后根据靶场桁架系统的目标固有频率值，给出了靶场桁架系统的稳定性方案。 第四，本文以大口径反射镜系统为研究对象，找出了其薄弱环节为十字片簧，分析了十字片簧各尺寸参数与大口径反射镜系统的固有频率之间的变化规律，并根据大口径反射镜系统的目标固有频率确定了满足稳定性条件的尺寸参数组合。 最后，应用概率理论分析了靶场结构耦合系统中靶点漂移随机误差与各光学元件随机误差之间的关系，并应用有限元方法对两者的关系进行数值模拟，从而验证了靶场结构耦合系统随机误差理论分析的可靠性。 本论文的工作为神光II升级装置的结构稳定性研究提供了一种有效的分析手段，并给出了提高结构稳定性的有效措施，所得的具体研究结果对于神光II升级装置的结构稳定性设计有着直接的参考意义。 |
| 英文摘要 | Firstly， the theory of structure stability was represented in detail; the key structural parameters which influence the structure stability were put forward， and the schemes to improve the structure stability were presented. On the other hand， according to the characteristic of SGII upgrade facility， the main factors which influence the laser beam positioning were represented in detail. Secondly， with the finite element method， the mode analysis was performed for the ICF target chamber system， and the weakness of ICF target chamber system was found. Then according to the weakness， the stability study was performed. The relationship between the nature frequency and the thickness of target chamber， the setting angle of carry feet， and the position parameter of rib was analyzed. Then according to the relationship， the optimized parameters were found. The structure stability was analyzed before and after improving the damping characteristic. At last， according to the required stability data of target lens， the stability scheme of ICF target chamber system was presented. Thirdly， the weakness of superstructure system was found with the finite element method， and then， according to the weakness of superstructure system， the stability study was performed for the superstructure system， the methods of improving the structure stability of superstructure system were represented， the relationship between the nature frequency of superstructure system and the position parameters of rib was analyzed and the optimized parameters were represented according to the relationship. At last， the stability scheme of superstructure system was represented according to the stability requirement of mirror. Fourthly， the large caliber mirror system was investigated， and then the cross-flexure pivots were found as the weakness of the large caliber mirror system. The relationship between the size parameters of cross-flexure pivots and the nature frequency of large caliber mirror system was analyzed， and then the size combination of cross-flexure pivots which satisfy the stability requirement was determined according to the goal natural frequency of large caliber mirror system. Finally，with the theory of probability, the relationship between the random error of target-drifting and that of optical elements was analysed for the structure coupling system of target area. And then, with the numerical simulation method, the relationship of them was analysed. So the reliability of theory of probability for analyzing the random error of structure coupling system was verified. The research work of this article provide a valid analytical means for the stability study of SGII upgrade facility， and represent some kinds of methods for improving the stability of structure， the research results have direct guidance on the structure stability of SGII upgrade facility. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/15608]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 黄宏彪. 高功率激光驱动装置中靶场单元结构稳定性研究[D]. 中国科学院上海光学精密机械研究所. 2009. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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