SNAME SPRING MEETING/ STAR SYMPOSIUM

Portland, Oregon—May 21-23 The 11th Spring Meeting/STAR (Ship Technology and Research) Symposium of The Society of Naval Architects and Marine Engineers will be held at the Red Lion Inn/ Lloyd Center in Portland, Ore., May 21-23. The theme of this year's symposium is "Looking to the 90s." In keeping with this theme, new ideas and challenges of the next decade will be explored in the technical sessions featuring 21 papers and two panel discussions.

The program is being organized by the host Pacific Northwest Section of the Society. The Steering Committee is chaired by David Donaldson and the Technical Program Committee is under Donald Hudson.

An entertaining social program will be provided. For early arrivals, a no-host reception with hors d'oeuvres will be held in the Red Lion's Mt. St. Helens Room on Tuesday, May 20, from 6-8 pm. At the President's Reception on May 21 from 6:30 to 8:30, SNAME president Perry W. Nelson and Mrs.

Grace Nelson will greet all registrants and guests in the Mt. Maltnomah Room. The President's Luncheon on May 22 will feature a program of speakers, the presentation of special recognition awards, and an address by Mr. Nelson.

The final social event, on May 22 from 6:00 to 10:00 pm, will begin with a salmon bake in a setting overlooking the Willamette River, which flows through the center of Portland, and conclude with a river cruise aboard a sternwheeler that was designed by a SNAME member of the Pacific Northwest Section.

On May 21 the Spouse Program will feature a tour of the City of Portland from 8:45 am to 4:00 pm.

This tour is scheduled to visit some of the botanical gardens that are located throughout the city, providing visitors with a good view of why Portland is called the City of Roses.

The second tour, on May 22 from 8:30 am to 2:00 pm, is of the Columbia River Gorge, providing views of some of the most spectacular scenery in the Pacific Northwest.

TECHNICAL SESSIONS Wednesday, May 21 Mt. St. Helens Room 9:00 am—"A Simulation Program for Vessel's Maneuvering," by John C. Daidola, Douglas A. Graham, and Donald C. Tolefson This paper discusses the development and application of a deepocean maneuvering simulation program created for the purpose of comparing the course-keeping and energy-consuming characteristics of a wide range of monohull mining vessel hull forms. Given the external environmental and thrust-producing forces, the program solves the linear equation of motion in the time domain, yielding the forces, displacement, and speed of each hull form.

10:00 am—"Feasibility of Marine Transportation of Municipal Sludge," by Nedret S. Basar and Leon M. Chandras This presentation will outline the development of a Static Simulation Computer Program that was developed to analyze, at feasibility levels, the marine transportation option for moving municipal sludge from a shoreside plant to sea. The resultant program enables coastal municipalities to investigate the feasibility of marine surface vessel disposal methods to alternate disposal options.

11:00 am—"Seagoing Hydraulic Hopper Dredges—the Last 60 Years, the Next 15 Years," by Alan M. Woolley This paper outlines the development of seagoing trailing suction hopper dredges over the past 60 years, describes some current designs, and predicts the apparent direction in which these vessels are developing. Improvements in major dredging equipment, propulsion systems, and control systems are described. Also discussed are the impact of environmental constraints, reducing manning, and new dredging requirements.

2:00 pm—Fishing Vessel Dynamics and Stability," by Bruce H.

Adee, Feng-I Chen, Patrick Eberhardt, and David Winandy The authors illustrate results from tests conducted in the natural wind-driven wave environment using a mobile wave-measuring platform, constructed in the form of a miniature semisubmersible drilling platform. Time series, wave directional spectra, vessel response spectra, and attempts at generating responsive amplitude operators are discussed.

3:00 pm—Panel Discussion: "Improved Shipyard Productivity— Zone Operation" 4:30 pm—Panel Discussion: "Obtaining and Administrating Future U.S. Navy Shipbuilding and Repair Contracts" Moderator: Jack L. Wilskey Panelists: James Beall, Michael J. Franz, and Jerry McMurry Mt. Bachelor Room 9:00 am—"Ship Motions and Stability in Transverse and Longitudinal Seaways," by A. Allievi, S.M.

Calisal, and F. Namiranian Motions and capsizing of fishing vessels are investigated experimentally for transverse and longitudinal seaways, involving a North Atlantic deepsea stern trawler and a typical West Coast fishing vessel. Values of heave, roll, and pitch are measured utilizing a computer-controlled wavemaker at a 220-foot-long model basin.

10:00 am—"Ship Stability Safety in Waves," by Andrew Zborowski This paper outlines scientifically based methodology for evaluation of ship intact stability in waves. The methodology is based on consideration of static stability, dynamic effects on static stability, and rolling motion. It assesses the contribution of the methodology and resulting procedure for stability relative to future proposals regarding ship stability standards in waves.

11:00 am—"A Numerical Method of Simulation Three-Dimensional Sloshing," by Jeffrey T. Dillingham This paper describes the problem- solving of water sloshing using a three-dimensional method versus the previously used two-dimensional method. This method is expected to have application in the prediction of the effect of green water on the decks of jackup rigs, heavy-lift vessels, and semisubmersible drilling vessels at the transition draft where the lower hulls are barely awash.

2:00 pm—"Changes Within the U.S. Coast Guard Commercial Vessel Safety Technical Organization," by Gordon Piche and John Veentjer This paper discusses the initiative taken by the USCG in the commercial vessel safety program within the past four to five years, and the resultant success in reducing the manpower intensiveness in this program.

The area of technical reviews, where initiatives have shifted some of the workload to third parties, thus reducing former backlogs, is also discussed.

Thursday, May 22 Mt. St. Helens Room 9:00 am—"Deep Ocean Mining: A Technology Developed in the 1970s for Use in the 1990s," by Raymond Kaufman, John P. Latimer, and Donald C. Tolefson This paper presents a general overview of the technology required for successful commercial mining of the deep-ocean manganese, hard mineral module. System discussions will center about ship proportions, maneuverability, propulsion systems for course-keeping, and systems required to support the mining operation such as pipe-handling, main hoists, gimbal structures, and the bending movements involved in the mining operation.

10:00 am—"Damage Criteria for Ship Plating Subjected to Wave Impact Forces," by Christopher J.

Wiernicki This paper presents a simple, yet rational analytical method of assessing the damage of an entire stiffened ship panel due to hydrodynamic impact forces. The criteria of ultimate failure of the panel will be formulated to include the plastic collapse and fracture of both the secondary and tertiary structures. A comprehensive casualty damage survey of ship structural failures will be presented in order to identify meaningful extreme loading trends, and to assess the possibility of minimizing these failures without complicating the engineering effort.

SNAME SPRING MEETING PROGRAM AT-A-GLANCE Tuesday, May 20 4:00-8:00 pm—Registration, outside Cascade Ballroom 6:00-8:00 pm—Mt. St. Helens Room Wednesday, May 21 8:00 am-6:00 pm—Registration 8:45 am-4:00 pm—Portland City Tour 9:00 am-Noon—Technical Sessions Noon-2:00 pm—Lunch Break 2:00-6:00 pm—Technical Sessions 6:39-8:30 pm—President's Reception, Mt. Maltonomah/Mt. Holloday Rooms Thursday, May 22 8:00 am-6:00 pm—Registration 8:30 am-2:00 pm—Columbia River Gorge Tour 9:00 am-Noon—Technical Sessions 12:15-2:00 pm—President's Luncheon 2:00-4:00 pm—Technical Sessions 6:00-10:00 pm—Salmon Bake/ River Cruise Friday, May 23 8:00-11:00 am—Registration 9:00-11:30 am—Technical Session 11:00 am—"From Cruiser Car Ferries to Cargo-Carrying Cruisers," by Markku M. Ranin This paper presents a chronological viewpoint of the car ferries/ passenger ferry services seen in the European marine service. The old, open-air, no-seating, uncomfortable open sea services are compared with the current level of luxury enjoyed by 6.5 million passengers annually in the ferry service between Finland and Sweden.

2:00 pm—"Determination of Cargo Damage Risk in Barge Collisions Using a Generalized Minorsky Model and Monte Carlo Methods," by Glenn Bauer, David L. Gray, and Bruce L. Hutchison This paper presents a generalization of the Minorsky one-dimensional relationship of energy absorbed and structural damage in ship collisions, developed further by the inclusions of Jones and Van Mater to account for structural resistance up to the point of failure.

The resulting model is used to analyze 12,500 randomly generated collision scenarios with a time domain simulation computer program. The results of the analysis are then compared with radioactive material (RAM) cash capabilities in order to estimate RAM cash damage risks in the navigable waters.

3:00 pm—"Flexural Response of Icebreaking Ships," by Henry Vaughan The design consideration of the hull stresses and loadings due to the initial impulse of ramming ice, and the sagging conditions that exist while the icebreaker is enduring the "beaching phase" of riding up on the ice are discussed. The author investigates both effects analytically and establishes bounds of magnitude for the establishment of preliminary design rules not available from finite element analysis.

Mt. Bachelor Room 9:00 am—"Reliability and Human Factors in Marine Engineering Systems," by Howard C. Blanding This paper will discuss marine engineering and industrial systems common to the offshore industry and the application of reliability engineering to such systems. Special attention is given to personal safety, environmental protection, and economic viability.

10:00 am—"A Guide for Ship Structural Inspections," by Nedret S. Basar and Victor W. Jovino It has been found that a need exists for the development of a Comprehensive Guide for Ship Structural Inspection for personnel involved in the design, building, acceptance, and operation of marine vessels. This paper will summarize the results of interviews and surveys conducted throughout the marine community, and will present the framework of a ship structural inspection guide prepared from the results of the surveys and interviews.

11:00 am—"Evaluation of Micro- Computers: General-Purpose Software for the Accomplishment of Routine NA&ME Tasks," by Paul F. Koenig The author will present an analysis of hardware and software available for the personal computers used in many homes and offices by the non-computer programmer. He will present an overview of software utilized on IBM-PC and Macintosh computers for finite element analysis, trim, and stability calculations and other areas of general interest to naval architects and marine engineers.

2:00 pm—"Propulsion Shafting Installation and Alignment Procedures by J. Cameron McKernan This paper is intended to be a guide for engineers and production personnel directly responsible for satisfactory installation of propulsion shafting systems. The method presented utilizes the procedures of utilizing the modeling and actual readings of the bearing reaction loading for determination of alignment accuracies.

3:00 pm—"Medium-Speed Diesels Aboard a Single-Fuel Ship: Selection, Criteria, Operating Profile, and Engine," by Kenneth Pearce, Jay G. Phelps, Andrew Sinclair, and Thomas Winslow This presentation will review original requirements as outlined by the operator; establish the operational profile with detailed analysis of loading and actual fuel used; outline modifications made to the basic engine; support systems for performance enhancement; and summarize with an objective review of requirement completions, excesses or shortcomings of single-fuel main and auxiliary engine systems.

Friday, May 23 Mt. St. Helens/ Mt. Hood Rooms 9:00 am—"General Jackson: Historic Features and Modern Standards," by Robin C. Eng, Paul A.

Gow, and James D. Johnson This paper will be presented by the team of naval architects/marine engineers that completed the concept design, system design, and construction of Opryland's newest attraction, the paddlewheel passenger vessel General Jackson (delivered last year by Jeffboat, Incorporated).

The presentation will focus on the concept and original design criteria that led to the contract drawings, design solutions that allowed the aesthetics of the late 1800s to be upheld while still providing for modern regulations concerning fire safety, and the construction and testing phases that led to almost virtual isolation of the sound stage from the typical noises of the marine environment.