Yu S.,Shanghai JiaoTong University |
Yang Q.,Shanghai JiaoTong University |
Liu J.,Shanghai Zhenhua Heavy Industry Co. |
Pan M.,Shanghai Zhenhua Heavy Industry Co.
ICRMS'2011 - Safety First, Reliability Primary: Proceedings of 2011 9th International Conference on Reliability, Maintainability and Safety | Year: 2011
Reliability design and reliability management have been fast developed for more than half a century. Failure Modes and Effects Analysis (FMEA), advanced Failure Modes and Effects Analysis (AFMEA) and Fault Tree Analysis (FTA) are three popular methods, which focus attention on finding the causes of functional and physical failure, rather than statistic mathematic methods. This paper compared and discussed the features of these three methods. After the discussion we proposed a scenario to incorporate FMEA and FTA, in order to solve some problems that cannot be managed by one method alone. With the comparison, further discussion of these three methods, and tentative incorporation of FMEA and FTA, we formed some new ideas of the possible development of reliability design. © 2011 IEEE.
Zheng Y.-K.,Shanghai Zhenhua Heavy Industry Co. |
Zhang S.-L.,Shanghai JiaoTong University
Chuan Bo Li Xue/Journal of Ship Mechanics | Year: 2016
Bonded rubber rings are widely used in many engineering domains to buffer the impact. In general, accurate load-deformation relationships are required in these applications. However, previous researches merely discussed the cylindrical rubber pad rather than the rubber ring. Besides, few of them are based on continuum mechanics theory. In this paper, the load-compression relationships of the bonded incompressible rubber ring are derived for three boundary conditions. The Mooney-Rivlin material is considered and the derivation is based on continuum mechanics theory. The results calculated by the derived formulae are compared with the FEM solutions and proved to have adequate accuracy for various shape factors and materials, even in the finite strain. The typical load-compression curves of the rubber rings are also presented and the characteristic of the compression stiffness in different boundaries are discussed. © 2016, Editorial Board of Journal of Ship Mechanics. All right reserved.
Yu S.,Shanghai JiaoTong University |
Qian J.,Shanghai JiaoTong University |
Zhang J.,Shanghai Zhenhua Heavy Industry Co.
Lecture Notes in Electrical Engineering | Year: 2015
As a bulk cargo handling equipment, ship unloader plays a very important role in port bulk material handling. As the international bulk cargo ship is becoming increasingly larger, the ship unloader is becoming larger as well. This paper builds the finite element model of the ship unloader, proposes a structure optimization method based on the orthogonal experimental method and a parametric modeling method, and develops software based on the two methods introduced above. The research includes the following: a new method to ship unloader’s structure optimization based on the orthogonal experimental method; the finite element model and the parametric modeling method of the ship unloader; and the parametric modeling and structure optimization software of the ship unloader. The software provides two functions: One is the parametric modeling function, and people can realize the ship unloader’s modeling by input parameters on the interface. The other is the structure optimization function, which can realize the weight reduction target of ship unloader by the structure optimization method based on the orthogonal experimental method. © Springer-Verlag Berlin Heidelberg 2015.
Liang Y.,Shanghai JiaoTong University |
Liang Y.,Shanghai Zhenhua Heavy Industry Co. |
Wu F.,Shanghai Zhenhua Heavy Industry Co. |
Ye J.,Shanghai Zhenhua Heavy Industry Co.
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2012
Based on the automation status and the main problem of container terminals, this paper introduced a new type of three-dimensional orbital automated handling system, which had high efficiency, energy saving and low cost operation. The three-dimensional orbital automated terminal was compared with the existing terminals in handling efficiency and operating energy consumption by using simulation method. The results show that the new terminal has obvious advantages both in handling efficiency and energy saving.
Huang Z.,Shanghai JiaoTong University |
Huang Z.,Shanghai Zhenhua Heavy Industry Co. |
Tang W.,Shanghai JiaoTong University |
Wang Y.,Shanghai Zhenhua Heavy Industry Co. |
Wang W.,Shanghai Zhenhua Heavy Industry Co.
China Ocean Engineering | Year: 2011
Since a self-elevating platform often works in water for a long time, the lattice leg is largely influenced by wave and current. The amplitude of leg joint stresses is a very important factor for the fatigue life of the platform. However, there are not many researches having been done on the mechanism and dynamic stress analysis of these leg joints. This paper focuses on the dynamic stress analysis and suppression methods of the leg joints of self-elevating platforms. Firstly, the dynamic stresses of the lattice leg joints are analyzed for a self-elevating platform by use of the 5th-order Stokes wave theory. Secondly, the axial and bending stresses are studied due to their large contributions to total stresses. And then, different joint types are considered and the leg-hull interface stiffness is analyzed for the improvement of the joint dynamic stress amplitude. Finally, some useful conclusions are drawn for the optimization design of the self-elevating platform. © 2011 Chinese Ocean Engineering Society and Springer-Verlag Berlin Heidelberg.
Yang C.,Shanghai JiaoTong University |
Zhang H.,Shanghai Zhenhua Heavy Industry Co. |
Zhong J.,Shanghai JiaoTong University |
Chen Y.,Shanghai JiaoTong University |
Chen S.,Shanghai JiaoTong University
International Journal of Advanced Manufacturing Technology | Year: 2014
Double-sided double arc welding (DSAW), a high efficiency method requiring no back chipping for welding thick plate of high-strength low-alloy steel was used in this study. Gas metal arc welding is employed for backing run and filler passes. The effect of DSAW on preheating temperature is investigated. Meanwhile, numerical simulation has been performed to predict transient temperatures, which are in good agreement with the experimental results. The critical stress in DSAW without preheating is 528.31 MPa, while in conventional welding with 100 C preheating temperature, it is 393.44 MPa. The higher critical stress implies that the samples in DSAW without preheating have better cold crack resistance than those in conventional welding with 100 C preheating temperature. Y-slit type cracking test indicates that the samples welded by double-sided double arc demonstrate better cold crack resistance than conventional welding at the same preheating temperature. Therefore, DSAW can realize welding thick plate of high-strength low-alloy steel with lower preheating temperature or even without preheating. © 2013 Springer-Verlag London.
Yang C.,Shanghai JiaoTong University |
Huang H.Y.,Shanghai Zhenhua Heavy Industry CO. |
Zhang H.J.,Shanghai Zhenhua Heavy Industry CO. |
Chen Y.X.,Shanghai JiaoTong University |
Chen S.B.,Shanghai JiaoTong University
Advanced Materials Research | Year: 2012
Double-sided double arc welding (DSDAW), a high efficiency method for welding thick plate of low alloy high strength steel which does not require back chipping is used in this paper, research on multi-pass route planning for thick plate of low alloy high strength plate by double-sided double arc welding. Firstly, establish a double-sided double arc welding system that can realize thick plate of low alloy high strength steel double-sided double arc welding by double robots. Then, Propose the multi-pass route planning for thick plate of low alloy high strength steel by double-sided double arc welding by means of misplaced welding. According to the welding parameters and the geometry size of groove, plan the layers, the number of beads and the concrete position of the welding torch for each bead. Finally, the welding experiment has been done to verify the effectiveness of multi-pass route planning. The results of welding experiment are approximately agreement with the multi-pass route planning results. The backing weld can get better appearance in the front and guarantee fusion penetration in the back simultaneously. On the basis of the multi-pass welding route planning, good fusion and leveling interface can be obtained after filler passes. © (2012) Trans Tech Publications, Switzerland.
Zhao N.,McMaster University |
Schofield N.,McMaster University |
Niu W.,Shanghai Maritime University |
Suntharalingam P.,McMaster University |
Zhang Y.,Shanghai Zhenhua Heavy Industry Co.
IEEE Transportation Electrification Conference and Expo, ITEC Asia-Pacific 2014 - Conference Proceedings | Year: 2014
Marine networks are experiencing an expanding role in the global transportation of goods and are demanding an increasing energy resource while being a contributor to climate change related emissions. This paper investigates the optimization of hybrid power-trains for port crane applications. The optimized system is capable of recovering energy in the 'Hoist-Down' and other regenerative braking operations. Moreover, due to the contribution of the power buffer in providing energy for acceleration operations, the main energy source can be replaced by a lower rated system. The power flow of the crane system is analyzed and the value of the energy saving potential is calculated; then, the design of the lifting motor is fundamentally studied based on the crane operating requirements; furthermore, the application of different energy/power storage devices in single and hybrid source configurations is discussed based on the crane specification. © 2014 IEEE.
Niu W.,Shanghai Maritime University |
Chu J.,Shanghai Maritime University |
Zhang Y.,Shanghai Zhenhua Heavy Industry Co. |
Xu T.,Shanghai Zhenhua Heavy Industry Co.
Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) | Year: 2015
Mathematical programming approaches are the most important methods for container ship automatic stowage problem. First, the general idea is given to show how to deal with container stowage problem by a mathematical programming method; then works of automatic stowage problem in recent ten years are reviewed from the point of view of shipping lines and ports; finally, two future challenges of automatic stowage problem are pointed out, one is the emergence of super-sized container ship and novel loading and unloading equipments, and the other is real time stowage strategies. ©, 2015, Wuhan University of Technology. All right reserved.
Chen F.,China University of Mining and Technology |
Shao Z.-H.,Shanghai Zhenhua Heavy Industry Co. |
Li J.-M.,China University of Mining and Technology
Applied Mechanics and Materials | Year: 2011
In this paper, the finite element model of the mining explosion-proof control switch case was established by ANSYS software. The case was analyzed by the nonlinear method, the weak area was found. Then, the correctness of the model was validated by hydraulic pressure test. Finally, a reasonable improved scheme of the case's structure was obtained. This thesis provides scientific information for design and optimization of the mining explosion-proof control switch case. © (2011) Trans Tech Publications.