CAMBRIDGE. MASSACHUSETTS 02139 



SUBROUTINES UMAXl, WMAXl. UTMAXl , WTMAXl LANGUAGE - FORTRAN IV 



COMPUTER - IBM 360/^*0 

 (COPY ON FILE AT NODC) 



COMPUTES U(MAX), W(MAX), THE PARTIAL DERIVATIVE OF U WITH RESPECT TO T 

 (MAX). OR THE PARTIAL DERIVATIVE OF W WITH RESPECT TO T (MAX) I.E. THE 

 MAXIMUM FLOW VELOCITIES IN THE X AND Z DIRECTIONS AND THEIR CORRESPON- 

 DING TEMPORAL ACCELERATIONS. AS A FUNCTION OF Z, FROM Z = -H To Z = 

 ETA(MAX), USING LINEAR WAVE THEORY. INPUT — WAVE HEIGHT. PERIOD. AND 

 LENGTH. AND THE WATER DEPTH. OUTPUT — RETURNS ARRAYS OF Z AND UMAX ( Z ) 

 ETC., FOR Z = -H. -(29/30)H. -( 28/30 ) H ... . FOR Z LESS THAN ETA(MAX). 



Alternate sets of routines carry out the same purpose using stqkes* 



SECOND- and third-order EQUATIONS. WRITEUPS AND LISTINGS IN TECHNICAL 

 NOTE NO. 13 OF THE M.l.T. HYDRODYNAMICS LABORATORY. 



PROF. RALPH H. CROSS 



ROOM 48-209 hydrodynamics LABORATORY 

 MASSACHUSETTS INSTITUTE OF TECHNOLOGY 

 CAMBRIDGE. MASSACHUSETTS 02139 



WAVE FORCE DISTRIBUTION. TEMPORAL AND SPACIAL LANGUAGE - FORTRAN IV 



COMPUTER - IBM 7090/94 

 (COPY ON FILE AT NODC) 



GIVEN THE WATER DENSITY, THE WATER DEPTH, THE PILE DATA, AND A CHOICE 

 OF WAVE HEIGHT AND PERIOD COMBINATIONS, THIS PROGRAM COMPUTES THE DIS- 

 TRIBUTION OF FORCE ALONG A PILE OF ANY SHAPE. ALSO CALCULATED IS THE 

 FORCE AT THE WATER SURFACE. THESE DISTRIBUTIONS ARE CALCULATED FOR 

 TWENTY EQUALLY SPACED POINTS THROUGHOUT THE WAVE CYClE. IF THE VALUES 

 OF C(M) AND C(D). (MASS AND DRAG COEFFICIENTS). ARE UNSPECIFIED. THE 

 VALUES ASSUMED ARE C(M) = 2.0 AND C(D) = 1.6. THE PROGRAM AlLqwS OTH- 

 ER VALUES TO BE SPECIFIED IN CASE THE SITUATION (I.E.. THE PILE SHAPE) 

 CALLS FOR IT. PROGRAM WRITTEN FOR THE WAVE RESEARCH LAB AT THE UNlV. 

 OF CALIF. REF. HEl REPORT 9-4 'WAVE FORCE PROGRAMS'. BY R.H, CROSS. 



PROF. RALPH H. CROSS 



ROOM 48-209 HYDRODYNAMICS LABORATORY 

 MASSACHUSETTS INSTITUTE OF TECHNOLOGY 

 CAMBRIDGE. MASSACHUSETTS 02139 



WAVE FORCES AND MOMENTS LANGUAGE - FORTRAN IV 



COMPUTER - IBM 7090/94 

 (COPY ON FILE AT NODC) 



GIVEN THE DESIRED COMBINATIONS OF WAVE HEIGHT AND PERIOD, PIlE DIAMET- 

 ER, AND WATER DEPTH, COMPUTES THE WAVE LENGTH, CHECKS FOR EXCESSIVE 

 STEEPNESS, AND COMPUTES THE TOTAL FORCE ON. AND THE MOMENT ABOUT THE 

 BASE OF, THE PILES CHOSEN. THE FORMULAS USED ARE DERIVED FROM LINEAR 

 THEORY EXCEPT THAT INTEGRATION IS CARRIED TO THE FREE SURFACE, AS CAL- 

 CULATED. FORCE AND MOMENT ARE COMPUTED FOR 40 POINTS IN A WAVE CYCLE. 

 REF. U. OF CALIF. HEL REPORT 9-4 "WAVE FORCE PROGRAMS' BY R.H. CROSS. 



PROF. RALPH H. CROSS 



ROOM 48-209 HYDRODYNAMICS LABORATORY 



MASSACHUSETTS INSTITUTE OF TECHNOLOGY 



SEAKEEPING LANGUAGE - FORTRAN IV 



COMPUTER - IBM 1130 

 (COPY ON FILE AT NODC) 



PREDICTS HEAVE, PITCH, AND ACCELERATION OF A DESIGNATED HULL FORM IN 

 REGULAR WAVES OVER A RANGE OF WAVE LENGTHS AND WAVE AMPLITUDES. THE 

 PROGRAM IS DIVIDED INTO FOUR MAINLINE SECTIONS — PART I SETS UP THE 

 INPUT DATA FOR THE TWO CALCULATING SECTIONS OF THE PROGRAM. PART II 

 CALCULATES THE SIMULATED ADDED MASS AND AMPLITUDE OF THE GENERATED 

 WAVES OF THE HULL FORM. PART III CALCULATES THE AMPLITUDES OF HEAVE, 

 PITCH, AND ACCELERATION. AND PART IV PLOTS AND CURVE FITS THIS INFOR- 

 MATION. REPORT REF. NO. USCG-PROGRAM-EnE-12 (JUL 68, 116 P) By JACK 



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