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- Title
- EXCITATION OF EDGE WAVES BY WAVES OBLIQUELY INCIDENT UPON A BEACH.
- Creator
- CHANG, YUH-HUEI., Florida Atlantic University, Lin, Newman K.
- Abstract/Description
-
Edge waves are the longshore periodic wave motions that are trapped at the edge of water bodies and play an important role in coastal hydrodynamics. This study presents the experimental investigation of the excitation of synchronous edge waves by waves normally and obliquely incident on a uniformly sloping beach. The experimental results show that the edge wave amplitude is linearly proportional to that of the reflected waves. For a perfectly reflecting beach, the conclusion is consistent...
Show moreEdge waves are the longshore periodic wave motions that are trapped at the edge of water bodies and play an important role in coastal hydrodynamics. This study presents the experimental investigation of the excitation of synchronous edge waves by waves normally and obliquely incident on a uniformly sloping beach. The experimental results show that the edge wave amplitude is linearly proportional to that of the reflected waves. For a perfectly reflecting beach, the conclusion is consistent with the Rockliff model. The experimental results also indicate that the ratio of the edge wave amplitude to reflected amplitude is linearly proportional to the approach angle.
Show less - Date Issued
- 1987
- PURL
- http://purl.flvc.org/fcla/dt/14380
- Subject Headings
- Ocean waves, Hydrodynamics
- Format
- Document (PDF)
- Title
- ANALYSIS OF HYDRODYNAMIC INTERACTIONS BETWEEN SHIPS IN CONFINED WATERS.
- Creator
- Ananthakrishnan, Palaniswamy, Florida Atlantic University, Lin, Newman K.
- Abstract/Description
-
The hydrodynamic interactions between ships in confined waters, restricted in width and depth, is analysed using a numerical surface singularity method called the Panel method. Based on potential flow and rigid free surface assumptions, a source distribution is utilized over the boundary surfaces to model the flow. The strength of the source distribution is obtained on satisfying the normal kinematic boundary conditions, i.e. as a solution of an integral equation. Discretization of the...
Show moreThe hydrodynamic interactions between ships in confined waters, restricted in width and depth, is analysed using a numerical surface singularity method called the Panel method. Based on potential flow and rigid free surface assumptions, a source distribution is utilized over the boundary surfaces to model the flow. The strength of the source distribution is obtained on satisfying the normal kinematic boundary conditions, i.e. as a solution of an integral equation. Discretization of the boundary surfaces yields a system of linear algebraic equations corresponding to the boundary integral equation, which then is solved numerically. From the singularity distribution, the velocity components, pressure coefficients and finally the interaction loads are calculated.
Show less - Date Issued
- 1985
- PURL
- http://purl.flvc.org/fcla/dt/14272
- Subject Headings
- Ships--Hydrodynamics
- Format
- Document (PDF)
- Title
- SHIP MOTION PREDICTION USING AUTO REGRESSIVE MOVING AVERAGE METHOD (NAVAL ARCHITECTURE, OFFSHORE TECHNOLOGY, DYNAMIC POSITIONING).
- Creator
- CHANDRASEKHARAN, CHANDRAMOHAN., Florida Atlantic University, Lin, Newman K.
- Abstract/Description
-
The time series method of Auto Regressive Moving Average (ARMA) is applied to the problem of real time ship motion prediction. The theory of Scalar input Scalar output ARMA (n, n-1) model and the same extended to multiple series as vector, ARMAV model have been concisely presented. The field experimental procedure for roll measurement of vessel at sea and barge model test procedure for heave and pitch measurements are discussed. The time series data of roll is analysed as a scalar ARMA (n, n...
Show moreThe time series method of Auto Regressive Moving Average (ARMA) is applied to the problem of real time ship motion prediction. The theory of Scalar input Scalar output ARMA (n, n-1) model and the same extended to multiple series as vector, ARMAV model have been concisely presented. The field experimental procedure for roll measurement of vessel at sea and barge model test procedure for heave and pitch measurements are discussed. The time series data of roll is analysed as a scalar ARMA (n, n-1) model and the results of prediction are presented. The model test data of heave, pitch and wave were analysed as ARMAV (n,n-1) vector model and the results are presented. The model test and experimental results demonstrate the feasibility of ARMA modeling procedure as a valuable tool in the area of real time ship motion prediction.
Show less - Date Issued
- 1985
- PURL
- http://purl.flvc.org/fcla/dt/14246
- Subject Headings
- Motion study, Marine engineering
- Format
- Document (PDF)
- Title
- EXCITATION OF EDGE WAVES ON AN EXPONENTIAL BEACH.
- Creator
- LIU, JONG-YU., Florida Atlantic University, Lin, Newman K., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
- Abstract/Description
-
Edge waves are the longshore, trapped waves; their amplitude diminishes exponentially seaward from the shoreline. Ursell [1] has shown that there is a family of edge wave solutions of the shallow water equations, and Ball [2] provided a normal mode solution for the exponential beach. This study investigated, experimentally, the excitation of edge waves on a concave exponential beach by waves normally incident on the beach. The experimental investigation included the study of edge wave...
Show moreEdge waves are the longshore, trapped waves; their amplitude diminishes exponentially seaward from the shoreline. Ursell [1] has shown that there is a family of edge wave solutions of the shallow water equations, and Ball [2] provided a normal mode solution for the exponential beach. This study investigated, experimentally, the excitation of edge waves on a concave exponential beach by waves normally incident on the beach. The experimental investigation included the study of edge wave frequency, amplitude and particle motions. The results indicated that resonance occurs under suitable conditions for edge wave excitation. Viscosity, nonlinearity and defraction at the beach sidewalls reduced agreement between experiments and theory. The effects of these parameters on edge waves should be explored in more detail in further research.
Show less - Date Issued
- 1985
- PURL
- http://purl.flvc.org/fcla/dt/14280
- Subject Headings
- Ocean waves--Analysis
- Format
- Document (PDF)
- Title
- THE USE OF COMPUTER SIMULATION TECHNIQUES IN THE DESIGN OF SHIP CHANNEL WIDTH (PORT, HARBOR, TAMPA).
- Creator
- THOMAS, CLINTON WILLIAM., Florida Atlantic University, Lin, Newman K., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
- Abstract/Description
-
This report presents a detailed approach to the problem of determining expected shipping delays that are caused by inadequate channel width. Data collection and analysis is accomplished for the shipping industry of Tampa Bay, Florida. Historical data and cargo projection are used to develop the expected shipping traffic density and distribution for the year 2000. An overview of a computer model that simulates the shipping traffic and accounts for delays due to channel width is presented. A...
Show moreThis report presents a detailed approach to the problem of determining expected shipping delays that are caused by inadequate channel width. Data collection and analysis is accomplished for the shipping industry of Tampa Bay, Florida. Historical data and cargo projection are used to develop the expected shipping traffic density and distribution for the year 2000. An overview of a computer model that simulates the shipping traffic and accounts for delays due to channel width is presented. A sensitivity analysis performed on the model to determine the effect each input variable has on shipping delays. The results are presented in the form of shipping delay curves for seven types of vessels over a range of channel widths.
Show less - Date Issued
- 1986
- PURL
- http://purl.flvc.org/fcla/dt/14287
- Subject Headings
- Shipping--Simulation methods, Channels (Hydraulic engineering)--Design and construction--Simulation methods, Shipping--Florida--Tampa Bay
- Format
- Document (PDF)