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 Asymmetric heat transfer of deformation on frictional surface of mechanical seals 会议论文 Xi'an, China, May 27, 2012 - May 30, 2012 作者:  Yu, Long;  Yu, Shurong 收藏  |  浏览/下载：0/0  |  提交时间：2020/11/15 Deformation  Friction  Heat transfer  Materials science  Asymmetric distribution  Force characteristics  Friction surfaces  Law of energy conservation  Mechanical seals  Seal rings  Testing results  Thermal distribution models  Thermal distributions  Verification method   Space optical remote sensor of the CAE thermal control index calculation method (EI CONFERENCE) 会议论文 2011 International Conference on Advanced Design and Manufacturing Engineering, ADME 2011, September 16, 2011 - September 18, 2011, Guangzhou, China Li L. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 The thermal control indicators CAE methods of Space optical remote sensor are analyzed in the presented work. We sat up a thermal optical analysis model for space optical remote sensor. By assuming fully covered by in-orbit temperature load  and using the finite element method for thermal deformation analysis  we obtained the optical remote sensor surface deformation and displacement under various thermal loading. Using ZERNIKE polynomial  wave was fitted to obtain ZERNIKE polynomial coefficients which were incorporated into the optical system design. Using CODE V optical calculation software  heat-ray machines under elastic deformation of the system point spread function  transfer function (MTF)  wave front differential (WFE) etc. were calculated. Image quality changes of remote sensors are discussed in variety assumed cases such as temperature loads of quality change. By repeated iteration  critical value of temperature fields meeting the design requirements are obtained for the optical system. Optical indicators were converged to the temperature field indicator  then reasonable indicators of thermal control for remote sensors were obtained. For the thermal control design  this method provided a reliable basis for design. (2011) Trans Tech Publications  Switzerland.   Effect of intermediate deformation in the texturing of Bi-2223/Ag tapes 会议论文 International Journal of Modern Physics B, Fifth International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials (New3SC-5), Chongqing, China, INSPEC Yi, H.P.; Lin, D.; Song, X.H.; Liu, W.; Liu, Q.; Han, Z.; Zheng, Y.K. 收藏  |  浏览/下载：4/0 The effects of beta -Si/sub 3/N/sub 4/ whisker content and orientation on R-curve behaviors of Si/sub 3/N/sub 4/ ceramics 会议论文 Key Engineering Materials, International Symposium on New Frontier of Advanced Si-Based Ceramics and Composites (ISASC 2004), Gyeongju, South Korea, INSPEC Lin-Hua Zou; Dong-Soo Park; Hai-Doo Kim; Chang-An Wang; Yong Huang 收藏  |  浏览/下载：3/0 Monte Carlo modeling of cube texture evolution in Ni-tapes during grain growth 会议论文 Materials Science Forum, Second Joint International Conference on Recrystallization and Grain Growth, ReX & GG2, SF2M, Annecy, France, INSPEC Lin, F.; Godfrey, A.; Miodownik, M.A.; Liu, Q. 收藏  |  浏览/下载：5/0 Research on the support structure of the primary mirror of large-aperture telescope (EI CONFERENCE) 会议论文 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Large Mirrors and Telescopes, July 8, 2007 - July 12, 2007, Chengdu, China Yang W.; Jingxu Z. 收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25 Large-aperture telescope can be used in surveying battlefield  researching landform  searching object  real-time monitoring  imaging  detecting and identifying spatial targets and so on. A large-aperture telescope for achieving high resolution power is designed to monitor spatial target and image in real time. Real-time monitoring plays an important role in military conflicts. The orbit parameter of object  quantity  geometrical shape parameter and so on can be obtained by detect spatial target. With the development of optical technology  people require larger aperture in optics-electronic (OE) system. By increasing optical aperture  the ability of collecting light and resolution power in the system can be enhanced. But the support structure of the primary mirror of large-aperture telescope will be a very difficult problem. With the increase of primary mirror aperture  the weight of the primary mirror will become larger than before. The root mean square (rms) of the primary mirror is affected by many factors  such as deadweight  deformation of heat  environment and so on. Due to the primary mirror of telescope is an important component of telescope system. By reducing the weight of primary mirror  precision of the system is ensured. During the designing phase  one can consider the supporting project of the primary mirror synthetically and analyze it roundly according to technical requirement of optical system and the effect factors. The final structural design can be reasonable. In an astronomical telescope  the surface of reflector is an important part for collecting dark radiation of celestial bodies. Its surface shape will have an effect on collecting efficiency of telescope radiant energy directly. So the rms must be very high. Optical system of large aperture  small wavelength and small focus can receive maximal light intensity. For ground-based optical astronomical telescope  the design proposed in the paper can satisfy the requirement of the possible minimum atmosphere seeing at astronomical observatory site and exert the use efficiency of the telescope adequately. So the accuracy of the traditional surface of reflector can assure that 90% of all the light energy can be focused on within the angle diameter range of the minimum atmosphere seeing  then 100% of light energy should be focused on the angle diameter range of minimum atmosphere seeing. Because the rms of mirror is very high  precise surface machining and accurate the support of mirror are very important tasks during designing and manufacturing the telescope. In the paper  various support techniques of a large-aperture telescope primary mirror are discussed and a 3.5 meter telescope system at the Starfire Optical Range (SOR) overviewed simply  which was operated by the Directed Energy Directorate of the Air Force Research Laboratory  Kirtland AFB  NM  USA from the ground-based O-E system for the observations of spatial target. We also analyze Theoretical elastic deformation of the Steward Observatory 2.3 meter mirror is analyzed.