共查询到20条相似文献,搜索用时 31 毫秒
1.
介绍了验证荷载法的基本原理,讨论了验证荷载法有效性的根本判别原则。通过在二维标准正态随机空间中对确定性验证荷载效应的考察,分析了验证荷载法能够对结构可靠度产生影响的实质。根据数值计算结果结合理论分析,探讨了确定性验证荷载效应的影响因素及其变化规律,从而得出了验证荷载法的适用范围,并给出了一般情况下能够对结构可靠度评估结果产生有效影响的确定性验证荷载水平的下限值。在确定性验证荷载法基础上,通过分析,将验证荷载法予以推广,给出了广义验证荷载法的一般性定义,并通过在三维标准正态随机空间内对随机性验证荷载的效应考察,探讨了随机性验证荷载的有效性问题。 相似文献
2.
FPSO/FSO: State of the art 总被引:2,自引:0,他引:2
Yoshihide Shimamura 《Journal of Marine Science and Technology》2002,7(2):59-70
Floating productions systems have been utilized in remote offshore areas without a pipeline infrastructure for many years.
However, they have become even more important with the push by the offshore industry into ever deeper waters. Floating production,
storage, and offloading/floating storage and offloading (FPSO/FSO) systems have now become one of most commercially viable
concepts for remote or deep-water oilfield developments. In this article, the advantages of FPSO systems are explained, and
their present status of maturity and utilization around the world is reviewed. Recent trends in mooring systems, hull construction,
safety, and operational issues are summarized from a technical viewpoint. Finally, the technical challenges and future prospects
of two significant growth areas, i.e., gas-field development and deep-water development, are discussed.
Received: June 24, 2002 / Accepted: July 17, 2002
Address correspondence to: Y. Shimamura (shimamura@modec.co.jp) 相似文献
3.
4.
公证与效率是新世纪人民法院工作的永恒的主题。公正与效率就是要公开,公正,公平,就是要当庭质证,认证,提高当庭审判,快审快结,为经济建设服务。 相似文献
5.
An important part of the French research program on cavitation erosion, conducted from 1980 to 1995, was devoted to pitting.
Histograms of pit size have been extensively used to characterise the hydrodynamic aggressiveness of a cavitating flow. Numerous
erosion tests, limited to the incubation period, were carried out on similar test sections, for different velocities, liquids,
length scales, and materials. Scaling laws were discussed and two kinds of methods for prediction of the erosion rate were
proposed. The first one is based upon the estimation of the aggressiveness of the prototype cavitating flow, from pitting
tests on a model and the simulation of the prototype histogram of pits on an appropriate device. The second one is based upon
a correlation between the advanced stage of erosion and the incubation period, consisting of a proper adimensionalization
of the mass-loss curve. After several years of research and the development of special facilities, devices and techniques,
more deterministic procedures for predicting cavitation erosion could now be developed, based not upon erosion tests, but
upon the characterization of the aggressiveness of the cavitating flow in terms of impact loads and the analysis of the mechanical
and metallurgical response of the material to successive impacts. 相似文献
6.
7.
中西园林造景艺术学习方法是具有差异性的,对造景艺术学习方法的研究工作非常重要,也非常必要。以“师法自然”为原则的中国园林自然观的理念必将得到弘扬。 相似文献
8.
随着科技的迅猛发展,大规模集成电路和智能化在通信设备中被广泛应用,使得各种先进通信设备对过压的要求也就越来越高。由于雷电在电源线、信号线、天线馈线上等感应的瞬间高压造成的危害时常发生,因此必须采取适当的保护措施以避免因瞬间高压及其所产生的强电流对传输线路、通信设备和人员造成危害。 相似文献
9.
船首靠离式滚装船泊位长度论证探讨 总被引:1,自引:0,他引:1
船舶所需泊位长度的大小不仅与船型有关,还与船帕的的驶靠方式密切关。本文在分析船首靠离式滚装船靠泊特性的基础上,结合《河港工程设计规范》对—般船舶所需泊位长度的规定,提出了论证船首靠离式滚装船所需泊位长度的新方法。 相似文献
10.
11.
12.
13.
14.
介绍在方案和初步设计阶段,如何运用概念性近似计算来确定剪力墙连梁的基本尺寸,并验证它们的可行性。 相似文献
15.
16.
本文通过对一起故意隐瞒事实的船舶碰撞事故,运用碰撞位置航迹推算图,分析了双方事故报告与客观规律不相符之处,根据事故发生规律,作出合理的推理,指导进一步的事故调查,使调查工作进展顺利,使事故真相大白. 相似文献
17.
分析了船舶厨房在使用液化石油气作为燃料时的消防安全问题。船舶厨房是船上消防安全的重要组成部分,但却重视不够。本文通过实例介绍了船舶厨房使用液化气的现状,并依据法规中有关规定进行了分析,指出了船舶在使用液化气时容易出现的安全隐患。 相似文献
18.