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中海油对边际油田开发一直非常重视,尤其近几年在依托开发方面取得了很大进展;目前高油价推动了无依托边际油田的开发,中海油有关单位都积极参与独立开发边际油田的方案和技术研究,推动边际油田的开发。针对上述有关方面的研究进行介绍。 相似文献
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Research on the influence of action between fin and anti-rolling tank on the integrated stabilization effect 总被引:1,自引:1,他引:0
YU Li-jun JIN Hong-zhang WANG Hui YANG Sheng 《船舶与海洋工程学报》2007,6(1):9-14
Through analyzing the roll model of the integrated system of fin and anti-rolling tank, this paper uses binomial equation to simplify the module and check how the approximate parameters simulate the original function. Based on the simplified module, the influence of fin and anti-rolling tank on the coefficient items of the roll module is discussed, and the influencing factors between fin and anti-rolling tank are analysed. And through simulation, the influence of action between fin and anti-rolling tank on the static characteristics, and the integrated stabilization effect, are analyzed. 相似文献
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Ji-qiang Niu Tang-hong Liu Xi-feng Liang 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2017,55(5):681-703
In order to determine the effect of the coupling region on train aerodynamic performance, and how the coupling region affects aerodynamic performance of the couple multiple units trains when they both run and pass each other in open air, the entrance of two such trains into a tunnel and their passing each other in the tunnel was simulated in Fluent 14.0. The numerical algorithm employed in this study was verified by the data of scaled and full-scale train tests, and the difference lies within an acceptable range. The results demonstrate that the distribution of aerodynamic forces on the train cars is altered by the coupling region; however, the coupling region has marginal effect on the drag and lateral force on the whole train under crosswind, and the lateral force on the train cars is more sensitive to couple multiple units compared to the other two force coefficients. It is also determined that the component of the coupling region increases the fluctuation of aerodynamic coefficients for each train car under crosswind. Affected by the coupling region, a positive pressure pulse was introduced in the alternating pressure produced by trains passing by each other in the open air, and the amplitude of the alternating pressure was decreased by the coupling region. The amplitude of the alternating pressure on the train or on the tunnel was significantly decreased by the coupling region of the train. This phenomenon did not alter the distribution law of pressure on the train and tunnel; moreover, the effect of the coupling region on trains passing by each other in the tunnel is stronger than that on a single train passing through the tunnel. 相似文献
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船用厚板高强度钢焊接性及其焊接裂纹的形成和预防 总被引:1,自引:0,他引:1
随着各类大型化、超大型化船舶的诞生,使得厚板高强度钢的使用日益广泛,但随之而来的是此类高强度钢易产生焊接裂纹的问题。文章列举了国内外船用厚板高强度钢焊接的工艺特点,分析了焊接裂纹的起因,并就预防措施进行了初步探讨。对从事船体结构的研究人员有一定的帮助。 相似文献
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海难是承运人对货损主张免责最常引用的抗辩,共有3种形式,本文分别予以区分和界定,并对其构成的基础加以分析,认为船舶适航是构成海难的前提。 相似文献