QQ客服 官方微博 反馈留言

浏览/检索结果: 共6条，第1-6条 帮助 限定条件 内容类型：会议论文     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Modeling and structural analysis of honeycomb structure mirror 会议论文 Amsterdam, Netherlands, 2012-7-1 Yeping Li 收藏  |  浏览/下载：109/0  |  提交时间：2014/01/12 Large telescope  Honeycomb mirror  FEA model  Active optics  Structural analysis  Thermal deformation   Numerical simulation on efficient spinning technology based on multi-point adjusting principle (EI CONFERENCE) 会议论文 2nd International Conference on Manufacturing Science and Engineering, ICMSE 2011, April 9, 2011 - April 11, 2011, Guilin, China Gong X. P. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 In order to realize high efficiency and flexible manufacturing for rotary surfaces  equivalent stress in sheet metal's center region and bendable rollers active region exceeds yield stress  efficient spinning technology (EST) is researched. It is the combination of multi-point forming and traditional spinning. Principle of EST is described  and plastic deformation is generated  traditional spinning method is compared with it  experimental result accords with simulation result. Feasibility of EST is validated by simulation and experimental results. (2011) Trans Tech Publications.  and characteristics of it are analyzed. Finite element analysis (FEA) model of disc-shape part is established  EST process is analyzed  equivalent stress and plastic strain distributions are analyzed. EST equipment is developed  and the experiments are made. Results indicate: EST process consists of four stages   Active Contour Method with Separate Global Translation and Local Deformation 会议论文 2nd International Conference Intelligent Robotics and Applications, Singapore, SINGAPORE, December 16-18, 2009 作者:  Zhu LL(朱琳琳);  Fan BJ(范保杰);  Tang YD(唐延东) 收藏  |  浏览/下载：14/0  |  提交时间：2012/06/06 Active contour  global translation  local deformation  gradient flow   Study on distortion control technology of the active stressed lap polishing deeper aspherical mirror 会议论文 Changchun, China, 2005-8-21 Ying Li; Daxing Wang 收藏  |  浏览/下载：13/0  |  提交时间：2013/12/24 active stressed lap  deeper asphericity  deformation  high precision   Support technique of ultra thin mirror in space optics (EI CONFERENCE) 会议论文 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 2, 2005 - November 5, 2005, Xian, China Gao M.-H.; Ren J.-Y. 收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25 With the development of space optical system  the technique of ultra thin mirror come forth and is paid more attention because of less difficulty in machining  low cost  lightweight  no disassembly during detecting and maintaining. The key technique takes advantage of deformation of ultra thin mirror as the influence of environment to adjust the surface figure. Its accuracy meets requirement. An analysis method is based on finite element analysis (FEA)  and many items  including the amount of support points  the way of arrangement  the optimum design of support component are studied. The finite element method was used to analyze the mirror and some different mirror support schemes. The principal aim of the mirror analysis is to get numbers of support points and the ways of the support. There are three schemes including 12-6-1  12-8-1 and 16-8-1 models. Deformation of deadweight is calculated under the three conditions. The way of 16-8-1 is more suitable than the designs of other two. The support subassembly is amended to meet with the mirror surface RMS in the range of 30m. Deformation of the mirror with support structure has been calculated. The result is 16.52nm  lower than a quarter of the wavelength  which indicates the feasibility of the support scheme applied to mirror. Theoretical result for the best way of support is presented. The result of analysis shows that requirement surface figure could be met through adjusting support points. It predicts feasibility of the support technique and provides theoretical value for active adjustment in the laboratory. At present  support and adjusting experiment of ultra thin mirror is being carried on.   Effect of temperature change on active control of nonlinear piezothermoelectric plates 会议论文 Proceedings of the 10th Conference on Engineering Mechanics. Part 1 (of 2), Boulder, CO, USA, May 21, 1995 - May 24, 1995 作者:  Zhou, You-He;  Tzou, H.S. 收藏  |  浏览/下载：2/0  |  提交时间：2017/01/18 Composite structures  Deformation  Equations of motion  Mathematical models  Natural frequencies  Nonlinear systems  Piezoelectric materials  Plates (structural components)  Thermal effects  Vibration control  Active control  Nonlinear deformations  Nonlinear piezothermoelectric plates  Static deformation  Von Karman equations