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RISS 인기검색어
- 검색키워드
- 저자 : Yao Fenglin (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Buckling theoretical analysis on all-terrain crane telescopic boom with n-stepped sections
Fenglin Yao,Wenjun Meng,Jie Zhao,Zhanjiao She,Guoshan Shi,Haibo Liu 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.8
Differential equations for telescopic boom with n-stepped sections are established on the basis of continuous beam column theory. The recursive formula for the stability of n-stepped telescopic boom is deduced by mathematical induction. The Levenberg-Marquardt numerical optimization algorithm combined with mechanical features is used to solve the transcendental equation in the recursive formula and determine the equations when n is unknown. The length coefficients obtained using the presented methods are compared with those of the China national standard GB3811-2008 and those calculated by ANSYS 17.0. Results show that the accuracy of the LevenbergMarquardt algorithm is better than those of other algorithms. Moreover, the obtained length coefficients display a certain degree of nonlinearity. Therefore, linear interpolation is feasible in small-scale practical applications. The use of linear interpolation method leads to large error in the critical force in n-stepped section of all-terrain cranes.
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Yao Fenglin,Meng Wenjun,Zhao Jie,Shi Guoshan,Bai Yanqiang,Li Hui,Cui Yaodong 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.6
When the large all-terrain crane operated under ultra-high hoisting height, the stability of boom system became the key factor of the lifting capacity. The installation of eccentric structure and super-lift device could help to improve the stability of boom system. In order to achieve the best effect of growth, it was important to study the relationship between eccentric structure and super-lift device. The eigenvalue buckling analysis and geometric nonlinear buckling analysis were carried out by ANSYS for the combined boom system of 500 t all-terrain crane with tower jib when lifting load, dead weight, offset load, wind load and lifting rope force were considered. And then the influence rule of the combined relationship between the strut length, opening angle, amplitude variation angle of the eccentric structure and the strut length, opening angle, amplitude variation angle of the super-lift device on the overall stability of combined boom system was analyzed to obtain the optimum parameter combination of eccentric structure and super-lift device, which provides reference for engineering practice.
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Study on the Simulation and Experiment of Cantilever Beam Piezoelectric Energy Harvester
Yao Fenglin,Meng Wengjun,Zhao Jie,Yin hang 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.9
Owing great to the widespread application of wireless sensor networks, supply energy for these wireless sensors proves to be a significant issue. Moreover, for the ambient vibration lies everywhere, the vibration can supply energy for the wireless sensor via energy harvester. The single cantilever beam piezoelectric energy harvester becomes the research focus for the simple structure and higher energy conversion efficiency. Due to the transcendental equation in distributed parameter model, the numerical method is become powerful complement for theoretical and experimental method. Static analysis, model analysis, harmonic response analysis and mechanical-electrical coupling analysis are simulated in ANSYS. Four aspects of the harvester has been studied in detail. Test and measurement show that Geometry and shape parameters have great affect to piezoelectric single cantilever energy harvester. In addition, the inherent characteristics of piezoelectric patch will affect enormously on the electrical characteristics
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