Day 1 Fri, August 06, 2004最新文献

Open Water Testing to Determine the Feasibility of Stereolithography as a Method for Propeller Model Construction 开放水域试验，以确定立体光刻作为螺旋桨模型建造方法的可行性

Day 1 Fri, August 06, 2004 Pub Date : 2004-08-06 DOI: 10.5957/attc-2004-008

Candace Brown

{"title":"Open Water Testing to Determine the Feasibility of Stereolithography as a Method for Propeller Model Construction","authors":"Candace Brown","doi":"10.5957/attc-2004-008","DOIUrl":"https://doi.org/10.5957/attc-2004-008","url":null,"abstract":"Testing in the Robinson Model Basin (RMB) has long been a supplement to Webb Institute’s academic program, providing students with a comprehensive education in naval architecture. Since the theory and design of propellers is an integral part of an education in naval architecture, utilization of the RMB testing facilities should naturally accompany traditional classroom propeller theory. Having recently been provided an apparatus for the testing of propellers, students now need an adequate source of propeller models.\u0000 The typical cost to have a specially designed propeller model manufactured for testing either for a thesis project or for classroom study is well beyond the financial means of Webb Institute. Previously, Webb has relied upon the generosity of other institutions with established propeller testing facilities, such as the University of Michigan and the Naval Surface Warfare Center, Carderock Division (also referred to as David Taylor Model Basin, or DTMB), for the loan of propeller models. While these borrowed propellers have served their purpose in demonstrating classroom theory, there have been limitations in the applications for which the borrowed propellers could be used. An opportunity for students to see a propeller advance from design to production had yet to be established.","PeriodicalId":260412,"journal":{"name":"Day 1 Fri, August 06, 2004","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124179056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Statistical Prediction of Interference Effects on Resistance in High-Speed Trimarans 干扰对高速三体船阻力影响的统计预测

Day 1 Fri, August 06, 2004 Pub Date : 2004-08-06 DOI: 10.5957/attc-2004-002

J. Slutsky, B. Metcalf

{"title":"Statistical Prediction of Interference Effects on Resistance in High-Speed Trimarans","authors":"J. Slutsky, B. Metcalf","doi":"10.5957/attc-2004-002","DOIUrl":"https://doi.org/10.5957/attc-2004-002","url":null,"abstract":"This report considers the analytically predicted interference effects in a methodical series of 378 trimarans based on Series 64 hull forms. Wave interaction effects on drag were evaluated statistically to obtain a series of algebraic expressions for interference prediction based on form-related parameters and known resistance characteristics of the component monohulls. This technique could be used in early-stage design to predict the calm water resistance of an arbitrary set of component hulls in a trimaran configuration based on their known individual monohull resistance characteristics.\u0000 Five variables: side hull length, longitudinal position, transverse position, and the displacement to length ratio of the center and side component hulls (expressed in English units as D/(.01L)3), each having between two and seven values were used to define a family of 378 trimarans based on Series 64 parent hulls. Resistance for each configuration was calculated using the Total Ship Drag program developed at Naval Surface Warfare Center Carderock.\u0000 Interaction effects wer examined both qualitatively and through a multiple linear regression statistical treatment. The results of the regression were used to develop a method for predicting the calm water resistance of a trimaran composed of arbitrarily chose component hulls with known resistance characteristics.","PeriodicalId":260412,"journal":{"name":"Day 1 Fri, August 06, 2004","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129400532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measuring Wave Resistance of High-Speed Multi-Hull Ship with Small Towing Tank 小型拖曳舱高速多体船波浪阻力测量

Day 1 Fri, August 06, 2004 Pub Date : 2004-08-06 DOI: 10.5957/attc-2004-001

H. Peng, W. Qiu, C. Hsiung

引用次数: 2

Test Apparatus for Conducting Research into Vortex-Induced Vibration of Marine Risers at High Reynolds Numbers 船用隔水管高雷诺数涡激振动研究试验装置

Day 1 Fri, August 06, 2004 Pub Date : 2004-08-06 DOI: 10.5957/attc-2004-007

D. Spencer

{"title":"Test Apparatus for Conducting Research into Vortex-Induced Vibration of Marine Risers at High Reynolds Numbers","authors":"D. Spencer","doi":"10.5957/attc-2004-007","DOIUrl":"https://doi.org/10.5957/attc-2004-007","url":null,"abstract":"Vortex-induced vibration (VIV) and vortex-induced motion (VIM) pose a significant hydrodynamic challenge for offshore risers and platforms respectively. Von Karmen vortex sheets that are periodically shed from bluff bodies induce time-varying lift forces on the body. If the body is not rigid these lift forces can induce significant motion or vibrations, greatly reducing fatigue life. The DeepStar JIP in 2001 contracted Oceanic Consulting Corporation to perform fundamental research into the nature of the forces. A specialized test apparatus was developed to tow a 6 m long segment of a 0.325 m diameter marine riser. A unique feature of the apparatus is its ability to operate in the transcritical regime with Reynolds numbers exceeding 106. The apparatus has two basic modes of operation free VIV and forced VIV and within each of these modes several test variation are possible. In the free mode the test cylinder was mounted on a system of springs and allowed to freely oscillate. In forced mode the cylinder is constrained to follow a sinusoidal motion with prescribed amplitude and frequency. This paper describes the apparatus and illustrates some of the basic results.","PeriodicalId":260412,"journal":{"name":"Day 1 Fri, August 06, 2004","volume":"13 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132570617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Evolving Role of the Towing Tank for Grand Prix Sailing Yacht Design 拖曳舱在大奖赛帆船设计中的演变作用

Day 1 Fri, August 06, 2004 Pub Date : 2004-08-06 DOI: 10.5957/attc-2004-005

F. Debord, K. Kirkman, D. Savitsky

引用次数: 5

Accuracy Issues and Measurement Complications Pertaining to Standard Ship Trials 与标准船舶试验有关的准确性问题和测量并发症

Day 1 Fri, August 06, 2004 Pub Date : 2004-08-06 DOI: 10.5957/attc-2004-003

D. Cumming

引用次数: 0

Modelling Multi-Directional Wind Waves and Swell in an Experimental Basin 模拟实验盆地的多向风浪和膨胀

Day 1 Fri, August 06, 2004 Pub Date : 2004-08-06 DOI: 10.5957/attc-2004-006

L. Mak, M. Sullivan, E. Baddour

引用次数: 0