Long-Term Extreme Value Analysis on Wave Loads of a Trimaran

瀏覽統計 Email 通知 RSS Feed

簡歷

基本資料

Project title

Code/計畫編號

MOST105-2221-E019-018

Translated Name/計畫中文名

三體船長期波浪負荷極值分析

Project Coordinator/計畫主持人

Chih-Chung Fang

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Systems Engineering and Naval Architecture

Website

https://www.grb.gov.tw/search/planDetail?id=11897451

Year

2016

Start date/計畫起

01-08-2016

Expected Completion/計畫迄

01-07-2017

Bugetid/研究經費

654千元

ResearchField/研究領域

機械工程

"本計畫研究重點在於應用 95 年計畫(NSC 95-2221-E-019-089-MY2)之三維前進-振盪(3D Translating-pulsating)格林函數數學模型，配合三維小板法，使用 HSC-3D 程式進行船體在波浪中運動及波浪負荷之頻域反應分析，將船體視為一平浮於水中之自由樑，計算三體船，船體橫剖面及橫跨甲板縱剖面各處所承受之波浪負荷[28]。本研究利用Bretschneider 波譜進行三體船在不同船速及航向角下、長波峰及短波峰海象，非規則波中之波浪負荷分析，期盼能完整探討三體船在不同船速及航向下，船體橫剖面及橫跨甲板縱剖面各處所承受之波浪負荷特性；本研究根據勞氏驗船協會法規之建議，長期之波浪統計分佈取自北大西洋波浪頻度表，發展三體船之長期波浪負荷極值分析統計模式，將分析三體船在二十年左右船齡之船體負荷極值，以與勞氏驗船協會法規之設計負荷進行比較與討論，最後進行超越機率分析，提供未來給三體船進行結構極限強度及疲勞強度分析使用，提昇國內在三體高速客輪之結構直接計算分析之核心競爭力。" "Since the wave load characteristics of trimaran ships cannot be estimated from experiences with conventional mono-hull vessel and Catamaran, investigations on these hydrodynamic aspects of trimarans are urgently needed to exploit their potential. Based on the previous project (NSC 95-2221-E-019-089-MY2), the global loads of a trimaran in oblique waves have been investigated by means of the 3D translating-pulsating source distribution model[28]. The wave loads including the shear forces, bending moments and torsional moments at different transverse sections of the trimaran ship hull and longitudinal section of connected deck are predicted at various wave heading and frequencies. In this study, the characteristics of longitudinal and transverse sectional wave load responses of the trimaran ship in irregular waves will be discussed. By using the Bretschneider spectrum and North Atlantic scatter diagram to carry out the long-term extreme value analysis on motion and wave load responses of the trimaran. The numerical results of long-term extreme loads will be compared with the design loads of Lloyd's Register rules. This will be a kernel technique for analysing the ultimate and fatigue structural strength of a trimaran."

Keyword(s)

三體船
三維小板法
負荷極值
非規則波
長期波浪統計
Trimaran
3 D panel method
Extreme load
Irregular wave
Long-term wave statistics

DSpace CRIS

Long-Term Extreme Value Analysis on Wave Loads of a Trimaran

基本資料

Description