The measurement of ship deformation has been a difficult problem for the global ship building industry and navigation field research.So far,an effective and proven method for measuring 3D position and attitude deforma...The measurement of ship deformation has been a difficult problem for the global ship building industry and navigation field research.So far,an effective and proven method for measuring 3D position and attitude deformation remains unavailable.This article proposes an innovative pose-relay videometrics measurement system for ship deformation on the basis of primary research and experimental validation.The system offers solutions to the important technical problems such as infrared marker manufacture,high-precision detection and multi-camera synchronization and control.Sea trials were carried out,and reasonable,long-term,and continuous 3D data of position and attitude deformations between a given deck point and the ship reference,and between the ship's head and the stern were acquired for the first time.The experiments have highlighted the considerable applicability of the proposed method of deformation measurement and long-term monitoring of ships and similar large structures.展开更多
The methodology and procedures are discussed on designing merchant ships to achieve fully-integrated and optimized hull-propulsion systems by using asymmetric aftbodies. Computational fluid dynamics （CFD） has been u...The methodology and procedures are discussed on designing merchant ships to achieve fully-integrated and optimized hull-propulsion systems by using asymmetric aftbodies. Computational fluid dynamics （CFD） has been used to evaluate the powering performance through massive calculations with automatic deformation algorisms for the hull forms and the propeller blades. Comparative model tests of the designs to the optimized symmetric hull forms have been carried out to verify the efficiency gain. More than 6% improvement on the propulsive efficiency of an oil tanker has been measured during the model tests. Dedicated sea-trials show good agreement with the predicted performance from the test results.展开更多
随着陆地资源日益枯竭,海洋成为人类生存和发展的广阔空间。针对海洋的研究不断扩大,海洋观测仪器日益增多,决定海上仪器工作时间的关键就是其内部电源的供电能力。在国家海洋能专项资金课题支持下,设计了一种利用海洋潮流能发电的2.5 ...随着陆地资源日益枯竭,海洋成为人类生存和发展的广阔空间。针对海洋的研究不断扩大,海洋观测仪器日益增多,决定海上仪器工作时间的关键就是其内部电源的供电能力。在国家海洋能专项资金课题支持下,设计了一种利用海洋潮流能发电的2.5 k W拖曳式水平轴潮流能发电装置,为大型海洋浮标装置提供可靠的水下电能补充,通过拖动试验及海上试验表明该装置启动流速低、可靠性高。展开更多
基金supported by the National Natural Science Foundation of China (10727202)
文摘The measurement of ship deformation has been a difficult problem for the global ship building industry and navigation field research.So far,an effective and proven method for measuring 3D position and attitude deformation remains unavailable.This article proposes an innovative pose-relay videometrics measurement system for ship deformation on the basis of primary research and experimental validation.The system offers solutions to the important technical problems such as infrared marker manufacture,high-precision detection and multi-camera synchronization and control.Sea trials were carried out,and reasonable,long-term,and continuous 3D data of position and attitude deformations between a given deck point and the ship reference,and between the ship's head and the stern were acquired for the first time.The experiments have highlighted the considerable applicability of the proposed method of deformation measurement and long-term monitoring of ships and similar large structures.
基金support from Guangzhou Shipbuilding International Company Ltd.(GSI) for the present study
文摘The methodology and procedures are discussed on designing merchant ships to achieve fully-integrated and optimized hull-propulsion systems by using asymmetric aftbodies. Computational fluid dynamics （CFD） has been used to evaluate the powering performance through massive calculations with automatic deformation algorisms for the hull forms and the propeller blades. Comparative model tests of the designs to the optimized symmetric hull forms have been carried out to verify the efficiency gain. More than 6% improvement on the propulsive efficiency of an oil tanker has been measured during the model tests. Dedicated sea-trials show good agreement with the predicted performance from the test results.
文摘随着陆地资源日益枯竭,海洋成为人类生存和发展的广阔空间。针对海洋的研究不断扩大,海洋观测仪器日益增多,决定海上仪器工作时间的关键就是其内部电源的供电能力。在国家海洋能专项资金课题支持下,设计了一种利用海洋潮流能发电的2.5 k W拖曳式水平轴潮流能发电装置,为大型海洋浮标装置提供可靠的水下电能补充,通过拖动试验及海上试验表明该装置启动流速低、可靠性高。
