Professors Wiggins, Gallagher, Onas, Royce and Werner
Engineering science courses deal with the application of knowledge gained in the basic sciences to the solution of engineering problems, using the theories and techniques of mathematical analysis. The principles learned are later applied in ship and power plant design. Engineering drafting and laboratory skills are included in this group of courses.
The extensive use of computers in the engineering and business communities makes it essential that all Webb graduates be literate in computer use and skilled in using complex programs. Some exposure to and practice in varied computer capabilities are stressed, including scientific and engineering problem solving, word processing and computer-aided graphics.
PROGRAMMING AND APPLICATIONS
This course provides an introduction to computer programming and focuses on the development of the logical problem-solving skills that are essential in engineering. Topics covered include logical expressions, conditional statements, variable types, looping, subroutines, and functions. The ability to properly annotate and debug coding is stressed. Student skills in the application of widely-used, commercially-available software such as Excel®, MathCad®, Visual Basic for Applications (VBA®), and MATLAB® are developed and exercised to facilitate their use in subsequent mathematics, science, and engineering courses. Two hours of class and one hour of laboratory per week in the first semester.
This is a course in applied vector mechanics with emphasis on static equilibrium. Topics include forces, moments, couples, equivalent force-couple systems, controls, distributed forces, and Coulomb friction. The application of the free body diagram in the analysis of static equilibrium of frames, machines, and trusses is stressed. Three hours of class per week in the second semester.
STRENGTH OF MATERIALS
The concepts of stress and strain of engineering materials are described and applied to various components such as beams, rods, and columns. Methods for calculating stresses in these components are introduced using Mohr’s Circle and other techniques. The response of components to axial, bending, and torsional loads is discussed and applied to problems such as torsion of shafts, stresses in pressure vessels, and buckling of columns. The deflection of beams is extensively treated. The basic concepts of fatigue are introduced. Three hours per week in the first semester.
ENGINEERING GRAPHICS (CAD)
This course develops the student’s ability to use modern engineering graphic techniques on computer-aided design (CAD) software. Students are introduced to fundamentals CAD usage with AutoCad in the initial part of the course. After some exercises from a text, they develop drawings on their own of various marine-related objects. The final part of the course is an introduction to 3-dimensional parametric modeling using SolidWorks software. Two hours of computer lab per week in the first semester.
Properties of fluids, concepts of the system, control volume, work, heat, energy, entropy, the laws of thermodynamics, and reversibility are studied and applied to topics in power cycles, combustion, and psychrometry. Three hours per week in the first semester.
The motion of particles and rigid bodies is studied. Topics include: kinematics and kinetics of particles, kinetics of systems of particles, plane kinematics and kinetics of rigid bodies, and three dimensional dynamics of rigid bodies. Three hours per week in the second semester.
This course examines both real and ideal fluids. It examines fluid statics, including hydrostatic forces, pressure at a point, and manometry. Fluid dynamics are discussed and the Bernoulli Equation is developed. Fluid kinematics are presented along with the justification for the material derivative. As more complex fluid processes are examined, finite control volumes and differential analysis are presented. Ideal flow concepts of velocity potentials and stream functions are introduced and applied to simple planar flows. The Navier-Stokes equations are developed for viscous flows and applied to simple problems. Other topics include fluid properties, dimensional analysis and modeling, and viscous flow in pipes. Three hours per week in the second semester.
This course introduces mechanical vibrations of single and multi-degree-of-freedom systems. It lays the foundation for the study of vibration analysis in areas related to ship design. Topics include derivation of the equation of motion and response of different types of mechanical models under free and forced oscillation, with and without damping.
Linearization of simple nonlinear systems is employed to allow a linear vibrational analysis. Computation of Fourier series approximation of specified periodic excitation is introduced. The concept of resonance and its influence on a vibrating system’s response amplitude are discussed. An experiment using a pendulum is provided as a course project to allow students to take measurements of vibration parameters of interest. Response under a periodic force of irregular form and convolution integrals are included. Decomposition of a transient process into forced and damped free oscillations is examined both theoretically and experimentally. The design of a vibration absorber to ameliorate vibrations on vessels is used as an application of coupled oscillators. Complex algebra and Fourier series are used throughout. Vibration measurement is discussed and demonstrated. Exact and approximate methods for determining mode shapes, natural frequencies, and modal analysis are included. Analysis of continuous systems is introduced.
Three hours per week in the first semester
The fundamentals of ship hydrodynamics are introduced in the context of naval architecture and ocean engineering. Conservation of mass and linear momentum and the Navier-Stokes equations are revisited. Description of the flow and its visualization are discussed, and the mathematical formulation of continuous flows is presented. The use of potential flow in understanding the fundamentals of fluid flow around a ship is included. Boundary layer theory is developed in relation to hull forms and lifting surfaces. The Flow Channel in the Haeberle Laboratory is used to demonstrate velocity measurement and visualization techniques of the flow around lifting surfaces. Vortex dynamics theory is introduced for simplified problems. An introduction is made to Computational Fluid Dynamics (CFD) with its assumptions and limitations. Unsteady motion and the concept of added mass are introduced, and calculations are carried-out for simple and more complicated shapes. Lift and drag topics include NACA foil sections, lifting line theory, Joukowski airfoils, and Glauert’s method for optimum planform. Green’s functions are introduced, for simplified potential theory problems. Potential theory is further developed for added mass and damping on a circular cylinder. Prediction of impact force is presented in terms of von Karman’s impact theory. Forces on a column are examined using Morrison’s equation. Three hours per week in the second semester.