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水下航行载体的水池测量算法
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作者 徐润东 《科技创新与生产力》 2014年第4期73-74,共2页
介绍了航行载体的陆上质量质心测量方法,分析了载体水中平衡状态,求解出载体水中浮力和浮心,得出载体精确的三维总体参数,从而实现载体的准确衡重和配平,确保了航行载体的水中总体参数一致性,满足了航行载体的正常航行。
关键词 水下衡重测量 质心测量 水池测量
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一种计算SES船尾波(Washwave)的数值方法
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作者 谢楠 Andrzej +2 位作者 JASIONOWSKI Dracos VASSALOS 《船舶力学》 EI 2004年第6期31-44,共14页
本文提出了一种无限深水中表面效应船(Surface Effect Ship,SES)尾波(Wash wave)数值方法.SES的尾波被表达成分布在气垫上的压力在静水中航行产生的兴波波浪场.在线性势流假设下,该尾波可解析地表示为积分形式,而其被积函数带有奇性并... 本文提出了一种无限深水中表面效应船(Surface Effect Ship,SES)尾波(Wash wave)数值方法.SES的尾波被表达成分布在气垫上的压力在静水中航行产生的兴波波浪场.在线性势流假设下,该尾波可解析地表示为积分形式,而其被积函数带有奇性并高频振荡.文中提出了一个变换,使变换后对不同的航速,SES船形(气垫形状)和所要计算的波浪场位置尾波计算中的被积函数是单调变化,因而易于数值计算.积分中的奇性也予以去除.数值计算结果表明本文提出的数值方法具有较高的计算效率而且结果与已发表的结果吻合良好.文中给出了一些SES船尾波(Wash wave)的计算结果,并进一步分析了SES尾波(Wash wave)中的局部和非局部波浪场成分.文中还尝试使用本文方法预报常规高速双体船的尾波(Wash wave),结果发现预报与水池测量结果相当吻合. 展开更多
关键词 船尾波 数值方法 压力分布 表面效应船 水池测量
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An Appropriate Unidirectional Wave Spectrum Model for the Strait of Hormuz
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作者 Reza Ghazangian Mehdi Shafieefar +1 位作者 Roozbeh Panahi Mohammad R. Allahyar 《Journal of Marine Science and Application》 CSCD 2015年第3期261-269,共9页
The objective of this paper is to introduce an appropriate unidirectional wave spectrum model for the Strait of Hormuz. The research is focused on assessing performance of standard wave spectrum models in the region. ... The objective of this paper is to introduce an appropriate unidirectional wave spectrum model for the Strait of Hormuz. The research is focused on assessing performance of standard wave spectrum models in the region. By evaluating such models based on valuable measurement data recently published, the calibration procedure has been conducted on such standard models to reach a better concordance between a modified standard spectral model and observed field spectra. The calibration is performed initially with respect to four distinct directions related to four available measurement stations. So, it results in four sets of coefficients for a nominated model. Next, it is continued to reach just one model insensitive to directions. Results clearly showed that the International Towing Tank Conference (ITTC) model is more appropriate than Joint North Sea Wave Project (JONSWAP) and Pierson and Moskowitz (PM) models in this area, even without any calibration. However, modifications have been successful on improving the conformity of the model. 展开更多
关键词 calibration JONSWAP model International Towing Tank Conference (ITTC) model Pierson and Moskowitz (PM) model Strait of Hormuz water wave spectrum
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