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Ganbo Zhang, Yao Zhao and Wei Chu
Propeller-induced longitudinal vibration resonance in marine propulsion shafting systems causes great harm to the hull structure and is the primary source of shipboard noise. Integrating a friction damper with designed parameters into thrust bearings can...
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Wei Chu, Yao Zhao, Ganbo Zhang and Hua Yuan
The longitudinal vibration of the propulsion shaft system is a challenging issue for marine noise management. We conducted various static and dynamic tests on our built test rig for the shafting system, presenting the results in this paper. By combining ...
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Xiaomin Liu, Changlin Li, Jianjun Du and Guodong Nan
In this paper, a thermo-hydrodynamic model of the bump foil thrust gas bearing is developed, which solves the coupled gas film three-dimensional energy equation, non-isothermal Reynolds equation, and the foil deformation equation. The effects of bearing ...
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Jianwei Zhang, Xiaoju Wang, Hao Wang and Hongyu Qin
Vertical loads are commonly transferred by piles primarily in the upper structures. However, lateral loads are also significant compared with vertical loads in pile foundation design. Compared with a pile on level ground, there are many particular charac...
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Yushan Gao, Shihui Huo, Peiyan Wang and Ping Zhang
The load-carrying capacities of welded joints need to be paid attention to in the design of the frame, which transfers the thrust generated by the rocket engine to the rocket body. A load-carrying capacity evaluation method of welded joints based on the ...
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Yaqi Tian, Cong Zhang, Lei Yang, Wu Ouyang and Xincong Zhou
Podded propulsors are widely used in warships and cruise ships, which have a higher requirement of vibrational and acoustic design. Therefore, studying vibration characteristics and the transmission mechanism of podded propulsor shafting is significant f...
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Christian Creixell,Javier Fuentes,Hessel Bierma,Esteban Salazar
Pág. 469 - 507
Cretaceous porphyry copper deposits of northern Chile (28º-29º30? S) are genetically related with dacitic to dioritic porphyries and they represent a still poorly-explored target for Cu resources. The porphyries correspond to stocks distributed into two ...
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Elizabeth J. Catlos, Chandra S. Dubey and Thomas M. Etzel
The Sikkim region of the Himalayas (NE India) may form an important microplate between Nepal and Bhutan. Here we report high-resolution pressure-temperature (P-T) paths taken from garnet-bearing rocks across the northern and eastern portion of the region...
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Arsalan Ahmed Othman, Ahmed K. Obaid, Diary Ali Mohammed Amin Al-Manmi, Ahmed F. Al-Maamar, Syed E. Hasan, Veraldo Liesenberg, Ahmed T. Shihab and Younus I. Al-Saady
Soil loss is one of the most important causes of land degradation. It is an inevitable environmental and socio-economic problem that exists in many physiographic regions of the world, which, besides other impacts, has a direct bearing on agricultural pro...
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Pei Xu, Chao Wang, Liyu Ye, Chunyu Guo, Weipeng Xiong and Shen Wu
The presence of broken ice in the flow field around a propeller causes severe blade erosion, shafting, and hull vibration. This study investigates the performance of the propeller of a ship sailing in the polar regions under the propeller?ice non-contact...
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Huifang Sun, Yue Lv, Jinbing Ni, Xianyu Jiang and Zhengwei Wang
Axial hydraulic thrust is an important factor that affects safety and stability of pump turbine operation. Research and analysis of axial hydraulic thrust is of a great significance for guiding the safe and stable operation of a pumped storage power stat...
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