ISO标准帮助实现世界海事日的目标

To fight climate change successfully, the world needs to act as a team. ISO is proud of its teamwork with partners such as the International Maritime Organization （IMO） in developing solutions to this challenge said ISO Secretary-General Rob Steele in connection with World Maritime Day 2009, which is organized annually on 24 September by the IMO, a partner organization to ISO in developing standards for this sector.     

ISO在防晒方面有了新的标准

A new ISO technical report which compiles the most commonly used methods for assessing the protection levels of suncreens will make it easier to evaluate the numerous tests on the market.     

WARC——储存亿万在线数据的新的ISO文件格式

A Web page that is here today, may not be here tomorrow. A new ISO standard, ISO 28500：2009, Information and documentation - WARC file format, will ensure that the vast and often valuable information posted on the Web is not lost when a page changes or disappears.     

巡航控制系统的ISO标准保证更安全和更愉快的驾驶

Ever driven a long distance using your cruise control and still felt tired and stressed from constantly having to adjust the vehicle speed to match traffic flow？ An ISO International Standard for full speed range adaptive cruise control is expected to reduce driver fatigue and stress on long commutes by automatically maintaining a safe distance from the car ahead regardless of its speed.     

通过标准解决气候变化——第40届世界标准日——2009年10月14日

World Standards Day is celebrated each year on 14 October to pay tribute to the efforts of thousands of experts worldwide who collaborate within IEC, ISO and ITU to develop voluntary International Standards that facilitate trade, spread knowledge and disseminate technological advances.     

ISO信息速递

The July-August 2009 issue of ISO Focus - the magazine of the International Organization for Standardization - presents concrete examples of how ISO International Standards can help to renew confidence eroded by the global financial crisis.     

带有变化率的同轴圆柱体受到的波浪力研究(英文)

Wave diffraction of two concentric porous cylinders with varying porosity was studied by using an analytical method based on eigenfunction matching.The fluid domain around the cylinders is divided into three sub-domains and in each sub-domain an eigenfunction expansion of the velocity potential is obtained by satisfying the Laplace equation,the boundary conditions on the free surface and on the sea bed.The unknown coefficients of eigenfunction expansions are determined by boundary conditions on the porous hulls.In the paper,the boundary conditions are based upon the assumption that the flow in the porous medium is governed by Darcy’s law.Two porous-effect parameters applied on two porous cylinders are functions of the vertical coordinate instead of the constant.Wave loading on the outer and inner cylinder is presented in the numerical results.     

ISO标准如何支持2009世界环境日的目标

ISO standards include tools for advancing the specific goals of this year＇s World Environment Day （WED - 5 June） , the theme of which is combatting climate change. Overall, ISO＇s offering includes hundreds of environment-related standards that support the broader aims of World Environment Day, which is coordinated by the United Nations Environmental Programme （UNEP） , a partner in the development of many of these standards.     

油气部门协会改进ISO国际标准的使用

The International Association of Oil and Gas Producers （OGP） has published a new issue of its Standards Bulletin, promoting the collaboration of OGP with ISO and encouraging the oil and gas sector to make use of the suite of ISO International Standards developed for a wide selection of vital off and gas industry materials, equipment and offshore structures. By the end of 2008, the suite comprised 138 standards and 19 are planned for 2009.     

轴向载荷作用下管状TY接头几何参数对应力集中系数的影响分析（英文）

In this paper, the influence of geometric parameters on the stress concentration factors due to three different types of axial loading on 81 TY tubular structures is studied. Our results reveal that, geometric parameters have a considerable impact on the variation of stress concentration factors on tubular TY-joints under axial loads. Thus, the highest stress concentration factor values are observed on the vertical brace than on the inclined one. The finite element results of the tubular structu...     

潜艇上方近场水下辐射噪声双峰特性的实验研究(英文)

The double-peak characteristic of underwater radiated noise in the near field on top of the target submarine was analyzed in depth on the basis of submarine test data on the sea. The contribution of three major noise sources to the radiated noise of a submarine were compared and analyzed, and emphasis was put on the original source, production mechanism, and their correlative characteristics. On the basis of analysis on underwater tracking and pass through characteristics of the target submarine, the double-peak phenomenon was reasonably interpreted. Furthermore, the correctness of the theoretical interpretation was verified adequately in real submarine tests. The double-peak phenomenon indicates that the space distributing character on submarine radiated noise are both asymmetrical with time and space, whereas that is provided with directivity. Studying the double-peak phenomenon in depth has important reference value and meaning in engineering practice for understanding the underwater radiated noise field of submarines.     

并靠两浮体上的波浪漂移力(英文)

An innovative hydrodynamic theory and numerical model were developed to help improve the efficiency, accuracy, and convergence of the numerical prediction of wave drift forces on two side-by-side deepwater floating bodies. The wave drift forces were expressed by the double integration of source strength and the corresponding Green function on the body surface, which is consistent with the far field formula based on momentum conservation and sharing the advantage of near field calculations providing the drift force on each body. Numerical results were validated through comparing the general far field model and pressure integral model, as well as the middle field model developed using the software HydroStar.     

如何掌握园艺技能!ISO标准确保安全操作修枝剪

A new ISO standard will help to eliminate or reduce the safety risks associated with the use of hedge trimmers.     

刚性阻振质量阻抑振动波的传递特性研究

Based on the principle of impedance mismatching,the performance of rigid vibration isolation mass in impeding vibration wave propagation was discussed from the perspective of wave approach.Based on FEM,the influence of its weight as well as the cross-section shape parameters on the isolation performance of rigid vibration isolation mass was studied through numerical simulation.The results show that rigid vibration isolation mass can effectively impede the propagation of the medium and high frequency vibration waves,and the heavier the vibration isolation mass,the better the isolation performance.For low frequency waves,the vibration isolation effect is not so obvious;for a rectangular vibration isolation mass,the isolation performance could be effectively improved by increasing the cross-section height and reducing the cross-section width.A useful reference was provided for the application of rigid vibration isolation masses to the vibration isolation and noise reduction of ship structure.     

海洋观测平台在波浪中运动响应的数值模拟(英文)

Offshore observation platforms are required to have great ability to resist waves when they are operating at sea. Investigation on the motion characteristics of the platforms in the sea can provide significant reference values during the platform design procedure. In this paper, a series of numerical simulation on the interaction of a triple-hulled offshore observation platform with different incident waves is carried out. All of the simulations are implemented utilizing our own solver naoe-FOAM-SJTU, which is based and developed on the open source tools of OpenFOAM. Duration curves of motion characteristics and loads acting on the platform are obtained, and a comparison between the results of the amplitude in different incident waves is presented. The results show that the solver is competent in the simulation of motion response of platforms in waves.     

三维测量数据的钢结构虚拟装配过程仿真系统(英文)

The virtual erection simulation system was explained for a steel structure including ship and ocean plant blocks.The simulation system predicted the erection state to optimize any gap or overlap of blocks based on 3-D measurement data.The blocks were modified(cut) on the basis of the simulation result on the ground before erecting them by crane.The re-cutting process was not required and the blocks were erected into a mother ship speedily.Therefore,the erection time is reduced,increasing the dock turnover.     

基于RANSE模型CFD预测E779A型螺旋桨空化及其在通用船体后的水动力性能（英文）

Ship propulsion performance heavily depends on cavitation, increasing the recent interest in this field to lower ship emissions. Academic research on the effects of cavitation is generally based on the open-water propeller performance but the interactions of the cavitating propeller with the ship hull significantly affect the propulsion performance of the ship. In this study, we first investigate the INSEAN E779A propeller by a RANSE-based CFD in open-water conditions. The numerical implementati...     

作用在双圆柱桩上波浪力准确解和有限差分解的比较

The wave force exerted on vertical piles of offshore structures is the main criterion in designing them.In structures with more than one large pile,the influence of piles on each other is one of the most important issues being concerned in past researches.An efficient method for determining the interaction of piles is introduced in present research.First the wave force is calculated by the exact method using the diffraction theory,then in the finite difference numerical method the force is calculated by adding the velocity potentials of each pile and integration of pressure on their surface.The results showed that the ratio of the wave force on each of the double piles to a single pile has a damped oscillation around unity in which the amplitude of oscillation decreases with the increase in the spacing parameter.Also different wave incident directions and diffraction parameters were used and the results showed that the numerical solution has acceptable accuracy when the diffraction parameter is larger than unity.     

ABSTRACTS

FMC convenes Global Regulatory Summit with officials from China and European Commission
Maritime regulators from the United States, the People＇s Republic of China （PRC）, and the European Commission met and conferred in Washington, D.C. on December 17, 2013 to consider the evolving international maritime landscape. The officials had open and candid discussions on their differing regulatory frameworks and the potential effects of carrier cooperation on international trade. While most of the discussions were held privately by the regulators, FMC Chairman Mario Cordero and members of the delegations from China and Europe spoke briefly about their regulatory summit publicly at the end of the day. The summit was early on billed as a global regulatory summit on the P3 Alliance,     

Time domain simulation of a one line failure for a DP-assisted mooring system

This paper focuses on the research of a semi-submersible platform equipped with a DP-assisted mooring system. Based on the working principles of the DP-assisted mooring system and the model of the platform motion, a time domain simulation program is applied to analyze the impact, in the case of one line failure, on the platform motion, power consumption of the thrusters and the tension of the mooring lines. The results show that, under the 10-year wind dominant, a one line failure will have little impact on the tension of the mooring lines. When the failure line is windward, the power consumption will increase greatly with a weakened position of accuracy. However when the failure line is leeward, the power consumption will be reduced with a partly strengthened oosition of accuracy.