Page 



10 - Free-Surface Positions in a Frame of Reference Fixed to the Body for 



t = 9.2, 9.4, .... 12.2 34 



11 - Comparison of Computed Nonlinear Force with Linear Force and with 



Second-Order Force as Functions of Time t 35 



12 - First- and Second-Order Forces versus Frequency Number for U-Shaped 



Cylinder • 36 



13 - Phase Angle of Forces of First- and Second-Order versus Frequency 



Number for U-Shaped Cylinder 37 



TABLE 1 - First- and Second-Order Force Coefficients 22 



