风荷载评估的类别视角

A. Guha, S. Boppudi, J. Rousseau
{"title":"风荷载评估的类别视角","authors":"A. Guha, S. Boppudi, J. Rousseau","doi":"10.4043/29465-MS","DOIUrl":null,"url":null,"abstract":"\n This study describes the purpose, scope, and acceptance criteria for wind load assessments that are used in the Classification of offshore units and installations. Wind loadings are applied as external environmental forces when evaluating afloat stability, structural strength, and mooring system integrity for mobile offshore units and site-specific installations. Existing criteria in the Rules and industry standards are identified to show the usage of the wind loads and their varying characterization depending on purpose, such as time averaging period and vertical speed distribution. The current requirements are placed in historical context based on the development of the offshore Classification Rules over the last 50 years, and the evolution of tools and technology to carry out the computations over that period are discussed.\n Practical aspects of calculation and independent analysis are illustrated by applying the standard methodologies in example calculations, using a geometric model that is of similar layout and complexity compared to existing offshore units. Sample calculations are presented as typically performed by Class in an independently developed model, and sensitivity analysis is used to point out areas where results may diverge depending on the approach by the assessor. The effect of these modeling decisions to evaluate wind moment is put in perspective by showing the change in the allowable vertical center of gravity, which relates directly to the deck load capacity of the platform.\n The result is a consolidated illustration of the Classification methodology for wind load analysis, which has been uniformly applied to a large number of offshore units and installations over a significant period of time. The importance of common assumptions and approach is highlighted, based on the effect that varying certain parameters has on overall results of the wind load calculation. The resulting impact of wind load changes on the stability, mooring, or structural analysis will be further shown. This will assist in providing visibility to industry on what constitutes a complete report of the wind loads for Classification purposes, how detailed a model should be for basic and detail design purposes, and how to improve confidence in the submission and approval process during design.","PeriodicalId":11149,"journal":{"name":"Day 1 Mon, May 06, 2019","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2019-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"A Class Perspective for Wind Load Assessment\",\"authors\":\"A. Guha, S. Boppudi, J. Rousseau\",\"doi\":\"10.4043/29465-MS\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n This study describes the purpose, scope, and acceptance criteria for wind load assessments that are used in the Classification of offshore units and installations. Wind loadings are applied as external environmental forces when evaluating afloat stability, structural strength, and mooring system integrity for mobile offshore units and site-specific installations. Existing criteria in the Rules and industry standards are identified to show the usage of the wind loads and their varying characterization depending on purpose, such as time averaging period and vertical speed distribution. The current requirements are placed in historical context based on the development of the offshore Classification Rules over the last 50 years, and the evolution of tools and technology to carry out the computations over that period are discussed.\\n Practical aspects of calculation and independent analysis are illustrated by applying the standard methodologies in example calculations, using a geometric model that is of similar layout and complexity compared to existing offshore units. Sample calculations are presented as typically performed by Class in an independently developed model, and sensitivity analysis is used to point out areas where results may diverge depending on the approach by the assessor. The effect of these modeling decisions to evaluate wind moment is put in perspective by showing the change in the allowable vertical center of gravity, which relates directly to the deck load capacity of the platform.\\n The result is a consolidated illustration of the Classification methodology for wind load analysis, which has been uniformly applied to a large number of offshore units and installations over a significant period of time. The importance of common assumptions and approach is highlighted, based on the effect that varying certain parameters has on overall results of the wind load calculation. The resulting impact of wind load changes on the stability, mooring, or structural analysis will be further shown. This will assist in providing visibility to industry on what constitutes a complete report of the wind loads for Classification purposes, how detailed a model should be for basic and detail design purposes, and how to improve confidence in the submission and approval process during design.\",\"PeriodicalId\":11149,\"journal\":{\"name\":\"Day 1 Mon, May 06, 2019\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-04-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Day 1 Mon, May 06, 2019\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4043/29465-MS\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Day 1 Mon, May 06, 2019","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4043/29465-MS","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

摘要

本研究描述了用于海上装置和设施分类的风荷载评估的目的、范围和验收标准。风荷载作为外部环境力,用于评估海上移动装置和特定地点装置的漂浮稳定性、结构强度和系泊系统完整性。规则和行业标准中的现有标准已确定,以显示风荷载的使用及其根据目的而变化的特征,例如平均时间和垂直速度分布。根据过去50年来海上分类规则的发展,将当前的要求置于历史背景下,并讨论了在此期间执行计算的工具和技术的演变。通过在实例计算中应用标准方法来说明计算和独立分析的实际方面,使用与现有海上装置具有相似布局和复杂性的几何模型。样本计算通常由Class在独立开发的模型中执行,敏感性分析用于指出结果可能因评估者的方法而出现分歧的区域。通过显示允许垂直重心的变化,这些建模决策对评估风矩的影响被透视出来,这直接关系到平台的甲板承载能力。结果是风荷载分析分类方法的综合说明,该方法已在相当长的一段时间内统一应用于大量海上装置和装置。基于改变某些参数对风荷载计算总体结果的影响,强调了共同假设和方法的重要性。风荷载变化对稳定性、系泊或结构分析的影响将进一步显示。这将有助于业界了解完整的风荷载分类报告的构成,基本设计和详细设计的模型应如何详细,以及如何提高设计过程中提交和批准过程的信心。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Class Perspective for Wind Load Assessment
This study describes the purpose, scope, and acceptance criteria for wind load assessments that are used in the Classification of offshore units and installations. Wind loadings are applied as external environmental forces when evaluating afloat stability, structural strength, and mooring system integrity for mobile offshore units and site-specific installations. Existing criteria in the Rules and industry standards are identified to show the usage of the wind loads and their varying characterization depending on purpose, such as time averaging period and vertical speed distribution. The current requirements are placed in historical context based on the development of the offshore Classification Rules over the last 50 years, and the evolution of tools and technology to carry out the computations over that period are discussed. Practical aspects of calculation and independent analysis are illustrated by applying the standard methodologies in example calculations, using a geometric model that is of similar layout and complexity compared to existing offshore units. Sample calculations are presented as typically performed by Class in an independently developed model, and sensitivity analysis is used to point out areas where results may diverge depending on the approach by the assessor. The effect of these modeling decisions to evaluate wind moment is put in perspective by showing the change in the allowable vertical center of gravity, which relates directly to the deck load capacity of the platform. The result is a consolidated illustration of the Classification methodology for wind load analysis, which has been uniformly applied to a large number of offshore units and installations over a significant period of time. The importance of common assumptions and approach is highlighted, based on the effect that varying certain parameters has on overall results of the wind load calculation. The resulting impact of wind load changes on the stability, mooring, or structural analysis will be further shown. This will assist in providing visibility to industry on what constitutes a complete report of the wind loads for Classification purposes, how detailed a model should be for basic and detail design purposes, and how to improve confidence in the submission and approval process during design.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信