http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Zhiyu Yao (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Zhiyu Wang,Qifei Wang,Peiyan Huang,Guowen Yao,Rui Yang,Zhanbiao Chen 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.2
Thermal gradient may have significant effect on the bending behavior of the composite girderwith trapezoidal profiled web. To quantify such an effect on the thermos-strain action,temperature elevation test and finite element modeling were carried out on the specimenswith the flange sensitive to bending and the web possessed adequate buckling resistance. Thecross-sectional thermal gradients for different location away from the middle of span weremeasured using thermocouples and correlated using Boltzmann sigmoid equations. Theapplicability of finite element model was validated against experiments in terms of thedistribution of thermal strain, deflections and axial strains. The axial strain distributions acrossthe flange width and along the longitudinal direction of girder were analyzed in details. Thetesting and finite element modeling results showed that, the deflections with applied loadsnear the middle of span subjected to maximum bending moment are notably influenced bythe increase of thermal gradient. The maximum axial strains at the upper surface and thelower surface of the bottom flange are obviously influenced by the temperature, especially forthe girders with relatively high span-depth ratios or thicker flanges. The thermal gradient at theupper surface of the bottom flange is relatively higher than that on lower surface for every10oC rise of temperature which meant that the upper surface of the bottom flange connectingtrapezoidal profiled webs is more sensitive to thermo-elastic action.
-
Shian Li,Zhiyu Yao,Facai Yang,Guogang Yang,Qiuwan Shen 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.4
Methane steam reforming (MSR) reaction is a promising industrial hydrogen production technology. Mg-Ni/CeO2 catalysts atdifferent Mg/Ni ratios of 6/4, 7/3, 8/2 and 9/1 with total loading of 10 wt% were used as catalysts for hydrogen production. The characterization techniques such as XRD, SEM and EDS were carried out on fresh and spent samples. Results showedthat the optimum Mg addition content for Mg/Ni-CeO2 is 2%. The process optimization of reaction parameters wereconducted by evaluating the catalytic activity. The stability of optimal Mg-Ni/CeO2 catalyst at 700 oC is examined for 8 h onstreamreaction. It reveals that Mg/Ni-CeO2 still maintains a relatively high catalytic activity after 8 h stability test.
-
Feasibility analysis of using a two-stage nutation drive as joint reducer for industrial robots
Yongwu Cai,Ligang Yao,Jun Zhang,Zhiyu Xie,Jinlong Hong 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.4
Nutation drive claims the advantages of high load capacity, large transmission ratio, desirable stability, low noise, and compact volume, which makes it an excellent alternative to typical joint reducers used in industrial robots. This paper proposes a novel two-stage nutation drive as a joint reducer for the industrial robot. The working principle of the nutation movement is first introduced followed by an analysis of transmission characteristics. The transmission ratio, the transmission efficiency as well as the structural schematic of the proposed nutation drive are presented. Finite element analysis of the main components, including nutation sleeve and bevel gears, was performed. Finally, a prototype was designed, manufactured and tested to verify the feasibility of applying the nutation drive as a joint reducer for industrial robots.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
