Experimental Investigation of FPSO Roll Motion Response Coupled with Sloshing in a Pair of Two Row Cargo Tanks

Floating Production Storage and Offloading Units (FPSOs) will continue to be in high demand because of their numerous advantages; such as, their ability to offer early production and operate in ultra-deep water locations, while remaining easy to relocate to meet changing needs. By design, slack cargo tanks are almost always present in FPSOs due to continuous loading and offloading operations; however, the presence of slack cargo impacts the seakeeping stability abilities of FPSOs. There are limited published experimental data on coupled sloshing with seakeeping of stationary vessels, and existing studies on this have focused on single row cargo tanks which is seldom the case in FPSOs. The aim of this paper is to study roll motion coupled with sloshing in partially-filled pair of two-row tanks of a stationary FPSO model exposed to regular beam waves. The model tests was performed in the Davidson Laboratory towing tank at Stevens Institute of Technology. The FPSO model response in roll was measured, and the time histories of sloshing oscillation were measured on the starboard and port side of one of the stern cargo tanks. The results show that varying internal cargo sloshing leads to unpredictable motion response of floating vessels that should be accounted for in the design and offloading operations of FPSO.

Seakeeping Evaluation of a Tri-SWACH Based on CFD Calculations and Model Tests

AEGIR is a time-domain seakeeping CFD code that uses an advanced, high-order boundary element method (BEM) to solve the three-dimensional potential-flow and has been developed for several years. In this paper, the latest version of AEGIR is used to predict the seakeeping of the Tri-SWACH with and without side hulls in headsea regular waves respectively. The primary objective was to evaluate its accuracy of predicting seakeeping performance of the Tri-SWACH under regular headsea waves in AEGIR. A series of simulated time domain heave and pitch responses for Tri-SWACH with and without side hulls via AEGIR have been compared with corresponding model tests conducted in the high speed towing tank in Davidson Lab, Stevens Institute of Technology. A good agreement in terms of heave and pitch responses between AEGIR numerical predictions and experimental data shows the seakeeping prediction capability of AEGIR for Tri-SWACH Preliminary Design. Also, the simulated seakeeping of a Tri-SWACH is compared with a Tri-SWACH center hull. It is found that the effects of side hulls will increase the transverse stability of the Tri-SWACH without causing additional significant effect on the seakeeping performance of the Tri-SWACH.

PRINCÍPIOS DA ADMINISTRAÇÃO CIENTÍFICA: A REVOLUÇÃO DE TAYLOR.

No dia 20 de março de 1856, Frederick Winslow Taylor nasceu na Pensilvânia (EUA), se formouem 1885 em Engenharia no Stevens Institute. Taylor era incansável na melhoria de produtividadediária de seus estimados empregados, logo se deu conta da miséria que aumentava as suas vidas.Com 23 anos, pela primeira vez, aplicou os processos científicos. Em toda sua vida instigou-sesempre a introduzir em trabalhos próprios, sobre sua responsabilidade ou fiscalização métodosde observação e experimentação, com o objetivo de maximizar o rendimento do trabalho, quantoa melhora produtiva dos trabalhadores.Como chefe de oficina, envolveu-se em mudanças no sistema de administrativo, com a finalidadede convergir às necessidades dos empregados e patrões, contrariando a tese antagônica.A carreira dele foi bastante frenética, em um período de seis anos trabalhou de operário aengenheiro-chefe. 50 patentes de invenção sobre máquinas, ferramentas e processos de trabalhoem seu nome. E pela sua grande contribuição a comunidade cientifica, desenvolveu a necessidadede melhoramento de processos.

EXTENDING ONLINE AND BLENDED LEARNING TO CORPORATIONS IN THE NEW YORK METROPOLITAN REGION

WebCampus.Stevens, the online graduate education and corporate training unit of Stevens Institute of Technology, delivers one of the largest and most effective ALN and blended programs of any college or university in the New York metropolitan region. Under a newly awarded Sloan Foundation grant [1], the school is extending its engineering and management programs to area corporations, supporting local telecommunications, pharmaceutical/life sciences, media, finance and other key industries. Stevens provides local employees of Fortune 500 and other companies access to high-quality online advanced technical and managerial skills, preparing them for success in global competition.Established in 1870, Stevens offers baccalaureate, masters and doctoral degrees in engineering, science, computer science, management and technology management, as well as a baccalaureate in the humanities and liberal arts, and in business and technology. The university enrolls about 1,800 undergraduates and 2,600 graduate students. It is one of the oldest and most respected engineering and management schools in the nation with a long tradition of meeting the technical and managerial needs of local industry.

Book Review: Today’s Environmental Issues: Democrats and Republicans

Walker is an associate professor of political science at Elmhurst College. This volume is part of a series titled “Across the Aisle.” The other titles cover Social Issues, Economic Issues and Foreign Policy Issues. The preface is written by Lindsey Cormack, an assistant professor of political science and director of the Diplomacy Lab at Stevens Institute of Technology. She goes on to state that members of Congress “do not dedicate the same amount of time and focus to each pressing environment issue.” (vii). Cormack presents some tables that contain both topics covered by party e-newsletters and keywords that are used most by each party. The preface also gives an overview of each party’s platform pertaining to environmental issues in 2016. The introduction states that this volume “examines the proposal and positions of the two parties—both the profound disagreements and the areas of common ground between the two parties.” (xviii).

Environmental Histories and Personal Memory: Collaborative Works in Sonification and Virtual Reality

This short paper will present an overview of two historical data projects developed at the Sensory Computation/Experimental Narrative Environments Lab at Stevens Institute of Technology between 2015–2017. The first project focuses on the sonification of environmental data derived from a ubiquitous sensing network embedded in Tidmarsh Living Observatory in Plymouth, Massachusetts. The second project presented in this short paper explores a history of instrument gesture data as a basis for interactivity in a virtual scene. This short statement discusses these two projects and their creative implications.

An Optimization Study of TriSWACH Side-Hull Position for Minimum Resistance in Calm Water

TriSWACH is a promising novel hull form for its reduced resistance, larger deck area and good seakeeping performance. This paper aims to determine an optimal sidehull position for TriSWACH based on the minimum resistance in calm water. STAR-CCM+, a RANS-based commercial CFD tool and a potential flow code Michelet are compared in their calculations of resistance. Four different side-hull positions of the TriSWACH operated within Froude number from 0.1 to 0.5 with increment 0.05 are considered for the numerical simulations. The simulation results are further validated by the model tests performed in Stevens Institute of Technology Davidson Laboratory towing tank. The comparison shows that STAR-CCM+ RANS codes can predict TriSWACH’s hydrodynamic characteristics in calm water with high accuracy. Finally, TriSWACH's optimal side-hulls’ position was discussed based on calm water resistance within different Froude number ranges.