TIME VARYING OPERABILITY USING FREQUENCY DOMAIN SEAKEEPING ANALYSIS

Authors
  1. Smith, T.C.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Seakeeping calculations are typically done in either the frequency domain or the time domain. TTSTEP combines frequency and time domains in order to study a large number of speeds and headings for a changing seaway. The program determines a seaway for each timestep based on the changing seaway description and calculates the motions in the frequency domain using SHIPMO5. By comparing the motions with criteria sets, the change in operability with respect to time may be found. This allows investigation of large numbers of time dependent operability aspects, that purely frequency or time domain methods do not. Furthermore, up to six criteria sets may be examined in one run. TTSTEP provides both tabular and graphical forms of output. The tabular output consists of the Percent Time Operabilities for different criteria sets and speed-heading combinations at the desired time steps. TRUNCATED
Report Number
DREA-TC-91-305 — Technical Communication
Date of publication
15 Aug 1991
Number of Pages
93
DSTKIM No
92-00119
CANDIS No
103020
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: