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浏览/检索结果: 共19条，第1-10条 帮助 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 Analysis of structure strength in mid-voltage dc high-speed operating mechanism based on the flexible body theory and transient dynamic methods 期刊论文 Gaoya Dianqi/High Voltage Apparatus, 2016, 卷号: 52, 期号: [db:dc_citation_issue] 作者:  Hu, Yang;  Zhang, Hantian;  Zhang, Youpeng;  Wu, Yifei;  Guo, Anxiang 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/02 Analysis of structure strength  Distributed load  Flexible body  High-speed operating mechanism   Analysis on A Gas Turbine Sealing Disk Structure and Material Strength 会议论文 3rd International Conference on Power and Energy Systems (ICPES 2013), Bangkok, THAILAND, 2014-01-01 作者:  Liu, Benwu;  Wang, Jianjun;  Yuan, Huiyi 收藏  |  浏览/下载：2/0  |  提交时间：2020/01/06 Compressor sealing disk  Crack Failure  Fracture Analysis  structure and Material  Comparison of Strength  High-Cycle Fatigue  Finite Element Analysis   Study on ultra-light secondary baffle for coaxial two-mirror telescope (EI CONFERENCE) 会议论文 2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China Zhang L.; Jia X.; Xie P.; Xing L. 收藏  |  浏览/下载：44/0  |  提交时间：2013/03/25 The coaxial two-mirror telescope consists of two mirrors facing each other. Classical two-mirror arrangements are Gregorian and Cassegrain. These systems are usually applied to space telescopes and often have optical baffles to prevent stray light from entering the focal plane. The optical baffles consist of concentric rings suspended between the secondary and the primary mirror. The secondary baffle for a large two-mirror optical system is designed and analyzed in this paper. According to mission of a telescope  the structure should have high stiffness and high reliability and light weight. Compared with invar  aluminum alloy and titanium alloy  carbon fiber composite is currently the best material in terms of weight-to-strength ratio. It also has advantages of high temperature tolerance and low thermal expansion. So carbon fiber composite is chosen as material to meet requirements of the coaxial telescope. In this paper  optimization method based on finite element analysis (FEA) is used for design the secondary baffle. Minimum weight of the baffle is chosen as an objective function. Thicknesses of former tube and vanes are chosen as variables. Analysis results show that the designed secondary baffle has maximum diameter of 180mm  total length of 120mm and weighs 142g. And its fundamental frequency reaches 651Hz. Therefore the baffle has many advantages  such as ultra-light weight  high stiffness and dimensional stability  etc. The optimization method and the baffle design can be helpful to other coaxial telescopes  such as Cassegrain  Gregorian and their subdivisions. 2012 IEEE.   Lightweight design and analysis of support structure of certain UAV engine (EI CONFERENCE) 会议论文 2012 International Conference on Electrical Insulating Materials and Electrical Engineering, EIMEE 2012, May 25, 2012 - May 27, 2012, Shenyang, Liaoning, China Xing X.; Liu B.; Han X.; Jia H. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 Support structure of UAV (Unmanned Aerial Vehicle) engine is the important support for UAV engine  playing a support role and bearing extremely complex load  so its lightweight  strength and dynamic characteristics have a great influence on high performance of UAV. This paper focuses on UAV having the requirement of high performance and stability to the support structure of engine  and uses the software of MSC.Patran and MSC.Nastran and topology optimization criterion to lightweight design and analysis the support structure of UAV engine under the premise condition of existing constraints. Then the static strength and modal are analyzed for the result of lightweight design  and the strength of the model and dynamic characteristics are verified. (2012) Trans Tech Publications  Switzerland.   Optimum design of the carbon fiber thin-walled baffle for the space-based camera (EI CONFERENCE) 会议论文 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Yan Y.; Gu S.; An Y.; Jin G. 收藏  |  浏览/下载：10/0  |  提交时间：2013/03/25 The thin-walled baffle design of the space-based camera is an important job in the lightweight space camera research task for its stringent quality requirement and harsh mechanical environment especially for the thin-walled baffle of the carbon fiber design. In the paper  an especially thin-walled baffle of the carbon fiber design process was described and it is sound significant during the other thin-walled baffle design of the space camera. The designer obtained the design margin of the thin-walled baffle that structural stiffness and strength can tolerated belong to its development requirements through the appropriate use of the finite element analysis of the walled parameters influence sensitivity to its structural stiffness and strength. And the designer can determine the better optimization criterion of thin-walled baffle during the geometric parameter optimization process in such guiding principle. It sounds significant during the optimum design of the thin-walled baffle of the space camera. For structural stiffness and strength of the carbon fibers structure which can been designed  the effect of the optimization will be more remarkable though the optional design of the parameters chose. Combination of manufacture process and design requirements the paper completed the thin-walled baffle structure scheme selection and optimized the specific carbon fiber fabrication technology though the FEM optimization  and the processing cost and process cycle are retrenchment/saved effectively in the method. Meanwhile  the weight of the thin-walled baffle reduced significantly in meet the design requirements under the premise of the structure. The engineering prediction had been adopted  and the related result shows that the thin-walled baffle satisfied the space-based camera engineering practical needs very well  its quality reduced about 20%  the final assessment index of the thin-walled baffle were superior to the overall design requirements significantly. The design method is reasonable and efficient to the other thin-walled baffle that mass and work environment requirement is requirement harsh. 2011 SPIE.   Thermal-structure analysis of supersonic dome based on three materials (EI CONFERENCE) 会议论文 2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China Jiang Z.; Ai X.; Wei Q.; Liu B.; Jia H. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 To a supersonic missile  a seeker could enhance the aerodynamic ability due to decrease the resistance in flying. At the same time  the primary function of a seeker has been considered as the most important equipment for a missile  due to the importance for cueing of targets and tracking for the final approach. However  the dome of a seeker  which is made up of glass  has poor mechanical performance. Especially  in the higher altitude  for a dome  in which the aerothermal and pressure loads could destroy the structure easily  it is necessary to do the thermal-structure coupled analysis due to varied materials. In the paper  to take the spherical dome of a seeker as a example  the analysis has been completed according to the varied materials consist of MgF2  Al2O3 and ZnS. The temperature loads and the pressure loads derived from the results of fluent analysis has been forced on the surface of dome  which simulates the actual Mach 2.5 in flying. According to the results of coupled analysis  the SEQV stress of the dome radium 80mm based on three materials had reached to 31MPa  which shows that the strength is sufficient for Mach 2.5  and offered the warranty to design the attaching to missile for the dome. At the same time  the results required the flexible mounting for the dome due to the displacements results  which the crystal material couldn't accept. 2011 IEEE.   An estimation method on failure stress of micro thickness Cu film-substrate structure 期刊论文 2010, 2010 Wang XiShu; Li Ying; Meng XiangKang 收藏  |  浏览/下载：3/0 Calcium phosphate coating on magnesium alloy for modification of degradation behavior 期刊论文 2010, 2010 Fu-zhai Cui; Jing-xin Yang; Yan-peng Jiao; Qing-shui Yin; Yu Zhang; In-Seop Lee 收藏  |  浏览/下载：7/0 The synergetic effect of carbon nanotubes and carbon black in a rubber system 期刊论文 2010, 2010 Fan Zhuang-jun; Wang Yao; Luo Guo-hua; Li Zhi-fei; Wei Fei 收藏  |  浏览/下载：9/0 改型等强度壳的理论与工程应用 期刊论文 2010, 2010 白雪飞; 任文敏; 郭日修; BAI Xue-fei; REN Wen-min; GUO Ri-xiu 收藏  |  浏览/下载：2/0