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Filtering by: Contributor advisor sim Thresher, Robert W.

A nonlinear dynamic analysis of inextensible mooring lines

Creator:

Rupe, Robert Charles

Abstract:

For over a hundred years, analysts have been concerned with the static and dynamic behavior of flexible cables. Hanging, towing and mooring cables have been extensively examined but little work has been done in the area of the anchor deployment problem. In the anchor deployment problem, a mooring line is...

Resource Type:

Masters Thesis
An analytical model for fatigue crack propagation

Creator:

Anderson, James L.

Abstract:

Beginning with the basic equations from the theory of elasticity and employing a model of crack propagation based on the concept of a constant plastic energy absorption per unti of crack extension, the commonly accepted power law of fatigue crack propagation was derived. This derivation uses an extension of the...

Resource Type:

Masters Thesis
Exact frequencies and mode shapes of a rotating beam

Creator:

Wright, A. D. (Alan Duane), 1954-

Abstract:

The exact frequencies and mode shapes of flexural vibration of a rotating beam are found. The beam has a linear mass and stiffness distribution. With certain simplifying assumptions, the kinetic and potential energies of the rotating beam are found. Hamilton's principle is then used to determine the equation governing the...

Resource Type:

Masters Thesis
Discrete-time blade pitch control for wind turbine torque regulation with digitally simulated random turbulence excitation

Creator:

Sharif-Razi, Ali-Reza

Abstract:

A time domain simulation model which approximates the three-dimensional velocity fluctuations of wind turbulence has been developed. This model is used in a discrete time control algorithm to regulate the output torque of a wind turbine by changing the pitch angle of the turbine blade. The wind model provides a...

Resource Type:

Dissertation