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Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×

REVIEW OF COMPLETED PROJECTS

Projects completed since the 1994 annual report was published are listed in Table 5. Project descriptions follow, with the addition of a brief summary of the final report, which represents the CMS's understanding of the results as reported by the author.

Project reports have been published, are in publication, or will be available from the National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, VA 22161. The NTIS numbers are given with each project description, along with the SSC report number. NTIS numbers also appear in Table 6.

Many recent reports may be available from the executive director of the SSC. Requests may be mailed to Commander Stephen E. Sharpe, Commandant (G-MI/SSC), 2100 Second Street, SW, Washington, D.C. 20593-0001.

TABLE 5 Completed Projects

Number

Project Title

Page

SR-1338

Uncertainty in Strength Models for Marine Structures . . . . . . . . . .

86

SR-1339

Effect of High-strength Steels on Strength Considerations of Design and Construction Details of Ships . . . . . . . . . . . . . . . . . . . . . . . . .

86

SR-1341

Residual Strength Assessment for Damaged Marine Structures . . . . . .

87

SR-1342

Hydrodynamic Impact on Displacement Ship Hulls . . . . . . . . . . . . .

87

SR-1346

Improved Ship Hull Structural Details Relative to Fatigue . . . . . . . .

88

SR-1348

Measurement of Ice Loads on Ship Structures . . . . . . . . . . . . . . . . . .

88

SR-1350

Reexamination of Design Criteria for Stiffened Plate Panels . . . . . . .

89

SR-1351

Hull Structure Concepts for Improved Producibility . . . . . . . . . . . .

89

SR-1353

The Role of Human Error in the Design, Construction, and Reliability of Marine Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

90

Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×

SR-1338 Uncertainty in Strength Models for Marine Structures (SSC-375) (NTIS PB95-126819)

Investigator Owen Hughes

Contractor Ross/McNatt Naval Architects, Stevensville, Maryland

Objective Quantify bias and uncertainty in structural-strength formulations in order to evaluate safety margins and derive design criteria.

Summary The report provides a methodology for the modeling and analysis of uncertainties in strength parameters that are suitable for the development of a reliability-based design method for ship structures. The report identifies the failure modes of principal structural members of ships that involve modeling uncertainty and, based on a review of sufficient test data, demonstrates the methodology. Data were collected about strength parameters for the selected failure mode of panel compressive collapse, and the method was applied to assess uncertainties. The report also identifies further research needs for uncertainty modeling and analysis of strength parameters.

Project Chair Rickard Anderson, Military Sealift Command, Washington, D.C.

Technical Adviser Paul H. Wirsching, University of Arizona, Tucson

SR-1339 Effect of High-strength Steels on Strength Considerations of Design and Construction Details of Ships (SSC-374) (NTIS PB95-100376)

Investigator Peter W. Buermann

Contractor Gibbs & Cox, Inc., New York, New York

Objective Analyze the in-service failures in construction details using high-strength steels, identify problem areas, and recommend design and construction details to reduce problems.

Summary The report calls attention to the problem of high-strength-steel structural details and provides a general methodology for assessing their strength using existing technology. Examples using this methodology are presented for existing high-strength-steel structural details that have presented problems in service.

Project Chair Philip G. Rynn, American Bureau of Shipping, Houston, Texas

Technical Adviser Roger G. Kline, Consultant—Ship Structures, New Berlin, Wisconsin

Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×

SR-1341 Residual Strength Assessment for Damaged Marine Structures

Investigator Christopher J. Wiernicki

Contractor Designers and Planners, Inc., Arlington, Virginia

Objective Develop approaches to assess the residual strength and life of marine structures that have sustained damage in service.

Summary This report identifies key elements that are required to undertake an analysis to evaluate the residual strength of damaged marine structures. Emphasis is placed on assessing the residual strength of marine structures that have been damaged due to normal operating loads. The report summarizes methods that are available to industry for evaluation of damage such as fracture. An example problem is presented that represents the application of an integrated approach to residual strength assessment to a particular ship type.

Project Chair John S. Spencer, American Bureau of Shipping, Houston, Texas

Technical Adviser Maria Celia C. Ximenes, Chevron Shipping Company, San Francisco, California

SR-1342 Hydrodynamic Impact on Displacement Ship Hulls

Investigator John C. Daidola

Contractor M. Rosenblatt & Son, New York, New York

Objective Assess the state of the art in estimating forebody hydrodynamic impacts on displacement ship hulls, and develop a plan for future research on hydrodynamic impact loadings on marine structures. The plan must address slamming, wave slap, and “frontal” impacts.

Summary The report identifies theories of hydrodynamic impact loading that have been developed over the years by many researchers. These theories and prediction methods are evaluated to identify those that are the most accurate, identifying gaps and assumptions that exist in the current technology. These prediction methods are compared by applying them to two vessels. The report also identifies the need for future research to address the gaps and assumptions that are identified.

Project Chair Allen H. Engle, Naval Sea Systems Command, Washington, D.C.

Technical Adviser Subrata K. Chakrabarti, Chicago Bridge & Iron Co., Plainfield, Illinois

Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×

SR-1346 Improved Ship Hull Structural Details Relative to Fatigue (SSC-379)

Investigator Karl Stambaugh

Contractor Consulting Naval Architects, Severna Park, Maryland

Objective Develop a series of improved structural details that account for the unique fatigue stress pattern of ship structures.

Summary The report presents a fatigue design strategy for welded ship structural details that is based on cumulative damage theory using nominal stress. The approach is modified to account for the complex geometry of welded structural details of ships. Fatigue notch factors and stress concentration factors are derived from experimental data and finite-element analysis. Guidance is provided showing detail designers how to improve the fatigue life of details by using this approach.

Project Chair Chao Lin, U.S. Maritime Administration, Washington, D.C.

Technical Adviser Robert L. Clark, Clark–Cim, Inc., Reston, Virginia

SR-1348 Measurement of Ice Loads on Ship Structures (SSC-376)

Investigator James W. St. John

Contractor Science Technology Corporation, Columbia, Maryland

Objective Develop a database on ice loads that could be used for probability-based design approaches. Assess the effects of ship displacement, impact location, and hull shape on the ice impact loads on icebreakers and other marine structures.

Summary Beginning in August 1992, the Nathaniel B. Palmer, a research vessel, operated for 3 weeks in mid-winter ice conditions, including first-year and second-year ice. In addition to an instrumented bow panel, there were instrumented panels on the starboard side, the transom, and on the bottom, so that the relative magnitudes of the impact loads could be compared for similar ice conditions but different hull locations. Data from a total of 800 ice-

impact events were obtained using the four instrumented hull panels.

This report covers instrumentation and data collection, analysis of the data gathered, and a comparison study between different ice-load measurement programs on different types of icebreakers.

Project Chair Rubin Sheinberg, U.S. Coast Guard, Washington, D.C.

Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×

Technical Adviser none assigned

SR-1350 Examination of Design Criteria for Stiffened Plate Panels

Investigator Natale S. Nappi, Sr.

Contractor Designers and Planners, Inc., Arlington, Virginia

Objective Evaluate the effects of loadings such as vertical shear, membrane stress, and torsion in the mathematic model for stress analysis of stiffened plate panels, and propose revised design criteria as warranted.

Summary The report presents the results of a study conducted to determine the effect of the stiffness characteristics of the supporting members of a grillage structure on plate panel stress. Grillage scantlings were developed using a first-principles–based approach and then analyzed using finite-element analysis techniques to take into account the flexibility of the grillage stiffeners and to quantify the effects of vertical shear, membrane, and torsional stress components. The results are summarized, indicating that the stress in a plate panel can be 50 percent higher if the stiffeners deflect than if the stiffeners are rigid. Vertical-shear stresses are only 10 percent greater than normal stresses, and initial plate deflection does not significantly affect the behavior of stiffened plate structures. The report also provides recommendations for future research.

Project Chair Gary North/Todd Ripley, U.S. Maritime Administration, Washington, D.C.

Technical Adviser Hsien Yun Jan, Martech Inc., Neshanic Station, New Jersey

SR-1351 Hull Structure Concepts for Improved Producibility (SSC-377)

Investigator John C. Daidola

Contractor M. Rosenblatt and Son, Inc., New York, New York

Objective Develop alternative structural system concepts for selected ship types that decrease labor requirements in design, fabrication, and outfitting phases. The structural systems should also be capable of low-cost maintenance during the life of a vessel.

Summary The report establishes foreign ship production baselines that are then used to evaluate alternative structural concepts from a construction time and manpower viewpoint.

Project Chair Norman Hammer, U.S. Maritime Administration, Washington, D.C.

Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×

Technical Adviser James R. Wilkins, Jr., Wilkins Enterprise, Inc., Riva, Maryland

SR-1353 The Role of Human Error in the Design, Construction, and Reliability of Marine Structures (SSC-378) (NTIS PB95-126827)

Investigator Robert G. Bea

Contractor Ocean Engineering Services, Moraga, California

Objective Perform a state-of-the-art assessment of the impact of human error (nonphysical factors) on the safety of marine structures. It would be a first step toward reducing the risk of failures due to human error and establishing procedures and guidelines to consider the effects of human error in design and the formulation of structural design criteria.

Summary The report presents an assessment of the influences of human error on the design, construction, and reliability of marine structures. The report categorizes human factors, considers relevant case studies, identifies qualitative and quantitative processes for evaluating the incidence and effects of human error, studies the impacts of human error on design guidelines, and evaluates how marine critical structural components and systems should be designed to accommodate human and organizational errors. The report also recommends fundamental approaches to improve the management of human and organizational errors in design and construction.

Project Chair John S. Spencer, American Bureau of Shipping, Houston, Texas

Technical Adviser Paul Fischbeck, Carnegie Mellon University, Pittsburgh, Pennsylvania; Marc Wilson, Dowling College, Long Island, New York.

Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×

TABLE 6 Cross-Reference of Ship Structure Committee Project Numbers and Report Numbers

BY SSC REPORT NUMBER

BY SSC PROJECT NUMBER

SSC Report Number

SSC Project Number

 

NTIS Accession Number

SSC Project Number

SSC Report Number

338

1297

 

PB91-152330

1297

338

339

1308

 

PB91-152759

1298

346

340

1308

 

PB91-146191

1300

349

341

1313

 

PB91-153635

1301

358

342

1313

 

PB91-146209

1303

344

343

1320

 

PB91-152124

1304

347

344

1303

 

PB91-153262

1305

334

345

1321

Part 1

PB91-149476

1306

348

345

1321

Part 2

PB91-146043

1307

359

346

1298

 

PB91-146043

1308

339

347

1304

 

PB91-173070

1308

340

348

1306

 

PB91-169748

1309

353

349

1300

 

PB91-160325

1310

351

350

1312

 

ADA-232630

1311

352

351

1310

 

PB91-153304

1312

350

352

1311

Abridged version

PB92-163294

1313

341

       

1313

342

352

1311

4-volume set

PB92-176296

1314

362

       

1315

357

353

1309

 

PB91-173328

1316

354

354

1316

 

ADA-247671

1317

355

355

1317

 

PB91-153270

1319

366

356

1323

 

PB91-153288

1320

343

357

1315

 

PB91-169730

1321

345

358

1301

 

PB91-146035

1322

364

359

1307

 

PB91-193458

1323

356

360

1328

 

PB91-129270

1324

367

361

1327

 

PB91-133421

1326

363

362

1314

 

PB91-170241

1327

361

363

1326

 

PB91-193441

1328

360

364

1322

 

PB91-201343

1330

368

365

1332

 

PB92-163286

1331

**

366

1319

 

ADA-258160

1332

365

367

1324

 

ADA-268409

1333

370

367

1324

Appendix

PB94-102225

1334

371

368

1330

 

PB94-109675

1336

369

369

1336

 

PB94-121928

1337

373

370

1333

 

PB94-121936

1338

375

371

1334

 

PB94-121944

1339

374

372

1347

 

PB94-121951

1341

*

373

1337

 

PB94-188208

1342

*

374

1339

 

PB95-100376

1346

379

375

1338

 

PB95-126819

1347

372

376

1348

 

PB95-

1348

376

377

1351

 

PB95-

1350

*

378

1353

 

PB95-126827

1351

377

379

1346

 

PB95-

1353

378

* To be assigned. Report numbers for all projects have not been assigned.

** Proceedings and Summary of National Conference on Use of Composite Materials in Load-bearing Marine Structures. 1990. Washington, D.C.: National Academy Press.

Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
This page in the original is blank.
Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
Page 85
Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
Page 86
Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
Page 87
Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
Page 88
Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
Page 89
Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
Page 90
Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
Page 91
Suggested Citation:"REVIEW OF COMPLETED PROJECTS." National Research Council. 1995. Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FY 1995 and Later-Years Research Program. Washington, DC: The National Academies Press. doi: 10.17226/9152.
×
Page 92
Next: APPENDIX A: LATER-YEAR POTENTIAL PROJECTS IN SUPPORT OF THRUST AREAS »
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