WAVEDEF Wave definitions and nomenclature Definition of trough and crest: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A trough (t) is defined as the global minimum between a level v down-crossing (d) and the next up-crossing (u) and a crest (c) is defined as the global maximum between a level v up-crossing and the following down-crossing. Definition of down- and up -crossing waves: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A level v-down-crossing wave (dw) is a wave from a down-crossing to the following down-crossing. Similarly, a level v-up-crossing wave (uw) is a wave from an up-crossing to the next up-crossing. Definition of trough and crest waves: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A trough-to-trough wave (tw) is a wave from a trough (t) to the following trough. The crest-to-crest wave (cw) is defined similarly. Definition of min2min and Max2Max wave: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A min2min wave (mw) is defined starting from a minimum (m) and ending in the following minimum. Similarly a Max2Max wave (Mw) is thus a wave from a maximum (M) to the next maximum (all waves optionally rainflow filtered). <----- Direction of wave propagation <------Mw-----> <----mw----> M : : c : / \ M : / \_ : c_ c F \ / \m/ \ : /: \ /:\ ------d--------u----------d-------u----d--------u---d-------- level v \ /: \ : /: : :\_ _/ : :\_ L \_ / : \_t_/ : : : \t_/ : : \m/ \t/ <-------uw---------> : <-----dw-----> : : : : <--------tw--------> <------cw-----> (F= first value and L=last value). See also tpdef, crossdef, dat2tc, dat2wa, dat2crossind
Wave definitions and nomenclature |
Wave definitions and nomenclature |
001 %WAVEDEF Wave definitions and nomenclature 002 % 003 % Definition of trough and crest: 004 %~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 005 % A trough (t) is defined as the global minimum between a 006 % level v down-crossing (d) and the next up-crossing (u) 007 % and a crest (c) is defined as the global maximum between a 008 % level v up-crossing and the following down-crossing. 009 % 010 % Definition of down- and up -crossing waves: 011 %~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 012 % A level v-down-crossing wave (dw) is a wave from a 013 % down-crossing to the following down-crossing. 014 % Similarly, a level v-up-crossing wave (uw) is a wave from an up-crossing 015 % to the next up-crossing. 016 % 017 % Definition of trough and crest waves: 018 %~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 019 % A trough-to-trough wave (tw) is a wave from a trough (t) to the 020 % following trough. The crest-to-crest wave (cw) is defined similarly. 021 % 022 % Definition of min2min and Max2Max wave: 023 %~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 024 % A min2min wave (mw) is defined starting from a minimum (m) and 025 % ending in the following minimum. 026 % Similarly a Max2Max wave (Mw) is thus a wave from a maximum (M) 027 % to the next maximum (all waves optionally rainflow filtered). 028 % 029 % <----- Direction of wave propagation 030 % 031 % 032 % <------Mw-----> <----mw----> 033 % M : : c : 034 % / \ M : / \_ : c_ c 035 % F \ / \m/ \ : /: \ /:\ 036 %------d--------u----------d-------u----d--------u---d-------- level v 037 % \ /: \ : /: : :\_ _/ : :\_ L 038 % \_ / : \_t_/ : : : \t_/ : : \m/ 039 % \t/ <-------uw---------> : <-----dw-----> 040 % : : : : 041 % <--------tw--------> <------cw-----> 042 % 043 % (F= first value and L=last value). 044 % 045 % See also tpdef, crossdef, dat2tc, dat2wa, dat2crossind 046 047 % history: 048 % revised pab 21.01.2000 049 % - changed from: Wave propagating direction 050 % to: Direction of wave propagation 051 % by Per A. Brodtkorb 19.09.1999 052 053 more on 054 help wavedef 055 more off 056
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