The Woodruff School

SUMMARY

The motivation for this study is to design and test a scaled laboratory model of a steel pile being driven by an impact force. The scaled model is approximately thirty times shorter than a typical 30 meter long Cast in Shell Steel (CISS) pile. The literature review cites other sources that discuss the principles of model scaling, pile driving in the field, and calculations involving resonance frequency and energy transfer between the shell and the fluid. The experimental setup section describes the design of the laboratory model as well as the instrumentation used in this experiment. The results section details the relationships between radiated sound, pile wall motion, and impact force in both the time and the frequency domain for the scaled model. Ultimately, the data from the scaled model can be used in the creation of a numerical model that will predict radiated sound for cases of pile driving in the field.

SUBJECT:	M.S. Thesis Presentation

BY:	Katherine Woolfe

TIME:	Tuesday, June 26, 2012, 9:00 a.m.

PLACE:	Love Building, 109

TITLE:	A Scaled Physical Model for Underwater Sound Radiation from a Partially Submerged Cylindrical Shell under Impact

COMMITTEE:	Dr. Mardi Hastings, Chair (ME) Dr. Aldo Ferri (ME) Dr. Erica Ryherd (ME)

SUMMARY The motivation for this study is to design and test a scaled laboratory model of a steel pile being driven by an impact force. The scaled model is approximately thirty times shorter than a typical 30 meter long Cast in Shell Steel (CISS) pile. The literature review cites other sources that discuss the principles of model scaling, pile driving in the field, and calculations involving resonance frequency and energy transfer between the shell and the fluid. The experimental setup section describes the design of the laboratory model as well as the instrumentation used in this experiment. The results section details the relationships between radiated sound, pile wall motion, and impact force in both the time and the frequency domain for the scaled model. Ultimately, the data from the scaled model can be used in the creation of a numerical model that will predict radiated sound for cases of pile driving in the field.