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浏览/检索结果: 共3条，第1-3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 INVESTIGATION OF OPTIMIZING ARRANGEMENT FORMS FOR COMBINED ANGULAR CONTACT BALL BEARINGS 会议论文 作者:  Fang, Bin;  Zhang, Jinhua;  Hong, Jun;  Zhu, Yongsheng;  Wang, Xu 收藏  |  浏览/下载：1/0  |  提交时间：2019/11/19 combined angular contact bearings  arrangement scheme  stiffness  fatigue life   Hydrodynamic safety analysis for retrofit of a supercritical T-shaped constant-pressure operating boiler 期刊论文 Dongli Gongcheng Xuebao/Journal of Chinese Society of Power Engineering, 2014, 卷号: 34, 期号: [db:dc_citation_issue], 页码: 501-506 作者:  Lu, Qiliang;  Yang, Dong;  Shen, Yanrong;  Lu, Ye 收藏  |  浏览/下载：1/0  |  提交时间：2019/12/02 Constant-pressure operating  Hydrodynamics  OFA  Retrofit scheme  Supercritical boiler  T-shaped arrangement   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.