! TORSIONAL ANALYSIS PROGRAM USING DOUBLE PRECISION.

! USER SPECIFIES WHETHER UNITS TO BE USED ARE ENGLISH OR SI

! COMPUTES NATURAL FREQUENCIES/MODE SHAPES AND STEADY STATE &

! TRANSIENT RESPONSE.

! MODE SHAPES CAN BE PLOTTED. MODAL TRANSFORMATION USED FOR

! RESPONSE CALCULATIONS.

! TRANSIENT RESPONSE OUTPUT CAN INCLUDE REVERSAL HISTORY &

! RESPONSE/TIME PLOTS.

! FOR RESPONSE CALCULATIONS THE MAXIMUM NUMBER OF MODAL

! COORDINATES IS 20.

! THIS CAN BE CHANGED BY ALTERING VALUE OF LK IN PARAMETER

! STATEMENT AND 20

! ARRAY DECLARATION IN SUBROUTINE ABC .

! MAXIMUM NUMBER OF DISTRIBUTED INERTIA ELEMENTS IS 40 AND

! POINT INERTIA ELEMENTS 81.

! THIS CAN BE CHANGED BY ALTERING VALUE OF L IN PARAMETER

! DECLARATION.

! MINIMUM NUMBER OF MODEL NODES IS 3.

! THIS IS BECAUSE ONE DISTRIBUTED QUADRATIC INERTIA ELEMENT

! HAS 3 NODES (ENDS & MIDDLE)

! INERTIA ELEMENTS MAY BE DISTRIBUTED ELEMENTS (2 TYPES) OR

! POINT ELEMENTS.

! ...