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 : Jingxiu Ling (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
Vibration response and parameter influence of TBM cutterhead system under extreme conditions
Jingxiu Ling,Wei Sun,Xiaojing Yang,Xin Tong,Ning Zhang 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.10
A cutterhead endures complex random loads when the TBM tunnels, which leads to structure excessive vibration, due to the extreme working conditions. So anti-vibration design is key in the cutterhead system design. In this study we established a virtual prototype of TBM mainframe system, comprehensively considering the spatial multi-point random excitations, split cutterhead structure and multidirectional support stiffness of the main bearing, etc., based on multi-body system dynamics and virtual prototype technology. For verifying the virtual prototype model, a TBM cutterhead vibration field detection system was constructed, to test the cutterhead accelerations and compare the simulation and measured results. The results show that the acceleration change rule by the two approaches is similar, and the maximum relative error is 55 %, keeping on the same order of magnitude, which illustrates the established model has certain reliability. Accordingly, an orthogonal test scheme for cutterhead radial vibration analysis was designed, to analyze the influence of different parameters on cutterhead vibration, based on the virtual prototype model. As indicated in the analysis, the parameter of cutter force had the greatest influence on cutterhead vibration, and then the pinion support stiffness and cutterhead rotating speed. Last, the cutterhead vibration optimal schemes in different directions were confirmed. The research results and methods can provide reference for TBM system parameters matching.
-
Life prediction and optimal design of flange structure of tire unloader
Jingxiu Ling,Wenjing Wang,Long Cheng,Qianting Wang,Hao Zhang 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.12
In the production process of the giant tire, the tire unloader needs to clamp and flip the tire, and the tire has a large inertia force, easy to cause vibration and lead to the failure of bearing parts, etc., then the flange is needed to play a fixed role. therefore, the rationality of flange design for the use of safety and service life are very important. For this reason, this paper simulates the flange connected to the tire unloader to obtain its stress history data, at the same time through genetic algorithm structure optimization analysis was carried out on the flange, it is concluded that the influence of structure parameters on the life of flange, and flange for structure optimization, get the optimized flange fatigue life 71 % increase compared to the original plan. The weight is reduced by 0.9 %, and the mechanical properties of the optimized flange are better.
-
Yuan Zhao,JingXiu Li,Ling Wang,Yanan Hao,Lin Yang,Pingting He,JianJun Xue 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.10
Sulfated TiO2 nanoparticles were successfully immobilized on zeolite through improving hydrolysis-deposition method. Microstructure, crystallization, surface state and surface area of composite catalysts were characterized by SEM, XRD, FTIR spectra, XPS and BET and the photocatalytic activity was evaluated by degradation of methyl orange under UV irradiation. We optimized these factors (SO4 -2) ions, calcination temperature and loading amount of sulfated TiO2) on photocatalytic activity and crystallization of composite photocatalysts. The results indicated that the SO4 -2 ) ions are successfully immobilized on the surface of TiO2, and sulfated TiO2/zeolite show the highest photocatalytic activity for methyl orange at the [SO4 -2]/[Ti4+] molar rate of 1:1, calcination temperature of 600 ℃ for 2 h, and sulfated TiO2 loading amount of 40%, respectively.
-
The Dynamic Comparative Analysis between Two TBM Main System Structures
Junzhou Huo,Hanyang Wu,Jing Chen,Jingxiu Ling,Xiaolong Sun 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.11
Excessive vibration and vibration damage are serious engineering problems in the TBM boring process. TBM dynamic characteristic analysis is essential to the anti-vibration design of the TBM mainsystem. This paper classifies the TBM thatmostly used in the practical engineering into TBM 1 and TBM 2, and comprehensively analyses the difference of cutter layout strategy, pinion layout strategy, shield support structure, etc between TBM 1 and TBM 2. A dynamic comparative analysis of TBM cutterhead was carried out based on a TBM dynamic model. The analysis results show that the cutterhead horizontal vibration of TBM 1 is around 0.3mm while that of TBM 2 is around 1.4mm.The vibration periodicity of TBM 2 significantly reduces. The influence of shield vertical support on the horizontal and vertical vibration of TBM 2 is analyzed. The results show that settinga vertical support at the bottom of the shield reduces the TBM cutterhead vibration by about 12%.
-
Junzhou Huo,Hanyang Wu,Jing Chen,Jingxiu Ling,Guangqing Li 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.7
In engineering, solving divergence and long solving time often occurs when solving large complex dynamic equations. Comparative analysis of Newmark and Rungekutta method fora complex dynamic model canprovidea theory basis for the selection of numerical integration method when solving complex dynamic equation.The comparative analysis on the solving precision and solving time by Newmark method andRungekutta method for calculating a same complex dynamic equation is carried out. The calculation results show that the response results by these two methods are in strong consistency. But the Newmark method shortens the solving time by at least 3 orders comparing that of Rungekutta method. Furthermore, the response displacement by Newmark method in different integration steps is obtained. The results indicate that the response results become stable with integration step continues reducing under 0.1.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
