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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. Source

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. Source

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. Source

Wang F.,Shanghai Maritime University | Wang Y.,Shanghai Zhenhua Heavy Industry Co. | Huang X.-X.,Shanghai Maritime University | Zhang Y.-K.,Shanghai Maritime University
Advances in Intelligent Systems and Computing | Year: 2015

In this paper, a kind of variable frequency power supply device simulating various fault states of inverter power supply was designed. The voltage waveform of inverter power supply in the normal state and in various fault states was measured and analyzed. The simulation experiment in Simulink of MATLAB was set up to testify the actual experiment. On the foundation of the analyzing of the output waveform and quality of the power, a method about fault diagnosing is put forward, that is the fault states of inverter are classified using a method of fault diagnosing based on SVM. At last, the SVM method is validated accurate through experimenting. © Springer International Publishing Switzerland 2015. Source

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. Source

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