PERIODDEF wave periods (lengths) definitions and nomenclature Definition of wave periods (lengths): --------------------------------------- <----- Direction of wave propagation <-------Tu---------> : : <---Tc-----> : : : : <------Tcc----> M : c : : : : / \ : M / \_ : : c_ c F \ :/ \m/ \: :/ \ / \ ------d--------u----------d-------u----d--------u---d-------- level v \ / \ / :\_ _/: :\_ L \_ / \_t_/ : \t_/ : : \m/ \t/ : : : : : : <---Tt---> : <--------Ttt-------> : : <-----Td-----> Tu = Up crossing period Td = Down crossing period Tc = Crest period, i.e., period between up crossing and the next down crossing Tt = Trough period, i.e., period between down crossing and the next up crossing Ttt = Trough2trough period Tcc = Crest2crest period <----- Direction of wave propagation <--Tcf-> Tuc : : <-Tcb-> <-> M : c : : : : / \ : M / \_ c_ : : c F \ :/ \m/ \ / \___: :/ \ ------d---------u----------d---------u-------d--------u---d-------- level v :\_ / \ __/: \_ _/ \_ L : \_ / \_t_/ : \t_/ \m/ : \t/ : : : : : : <-Ttf-> <-Ttb-> Tcf = Crest front period, i.e., period between up crossing and crest Tcb = Crest back period, i.e., period between crest and down crossing Ttf = Trough front period, i.e., period between down crossing and trough Ttb = Trough back period, i.e., period between trough and up crossing Also note that Tcf and Ttf can also be abbreviated by their crossing marker, e.g. Tuc (u2c) and Tdt (d2t), respectively. Similar applies to all the other wave periods and wave lengths. (The nomenclature for wave length is similar, just substitute T and period with L and length, respectively) <----- Direction of wave propagation <--TMm--> <-TmM-> : : M : : M : / \ : M /:\_ : M_ M F \ : / \m/ : \ : /: \ / \ \ : / : \ : / : \ / \ \ : / : \ : / : \_ _/ \_ L \_ : / : \_m_/ : \m_/ \m/ \m/ : : : : <-----TMM-----> <----Tmm-----> TmM = Period between minimum and the following Maximum TMm = Period between Maximum and the following minimum TMM = Period between Maximum and the following Maximum Tmm = Period between minimum and the following minimum See also wavedef, ampdef, crossdef, tpdef
wave periods (lengths) definitions and nomenclature |
wave periods (lengths) definitions and nomenclature |
001 % PERIODDEF wave periods (lengths) definitions and nomenclature 002 % 003 % Definition of wave periods (lengths): 004 %--------------------------------------- 005 % 006 % 007 % <----- Direction of wave propagation 008 % 009 % <-------Tu---------> 010 % : : 011 % <---Tc-----> : 012 % : : : <------Tcc----> 013 % M : c : : : : 014 % / \ : M / \_ : : c_ c 015 % F \ :/ \m/ \: :/ \ / \ 016 %------d--------u----------d-------u----d--------u---d-------- level v 017 % \ / \ / :\_ _/: :\_ L 018 % \_ / \_t_/ : \t_/ : : \m/ 019 % \t/ : : : : 020 % : : <---Tt---> : 021 % <--------Ttt-------> : : 022 % <-----Td-----> 023 % Tu = Up crossing period 024 % Td = Down crossing period 025 % Tc = Crest period, i.e., period between up crossing and 026 % the next down crossing 027 % Tt = Trough period, i.e., period between down crossing and 028 % the next up crossing 029 % Ttt = Trough2trough period 030 % Tcc = Crest2crest period 031 % 032 % 033 % <----- Direction of wave propagation 034 % 035 % <--Tcf-> Tuc 036 % : : <-Tcb-> <-> 037 % M : c : : : : 038 % / \ : M / \_ c_ : : c 039 % F \ :/ \m/ \ / \___: :/ \ 040 %------d---------u----------d---------u-------d--------u---d-------- level v 041 % :\_ / \ __/: \_ _/ \_ L 042 % : \_ / \_t_/ : \t_/ \m/ 043 % : \t/ : : 044 % : : : : 045 % <-Ttf-> <-Ttb-> 046 % 047 % 048 % Tcf = Crest front period, i.e., period between up crossing and crest 049 % Tcb = Crest back period, i.e., period between crest and down crossing 050 % Ttf = Trough front period, i.e., period between down crossing and trough 051 % Ttb = Trough back period, i.e., period between trough and up crossing 052 % 053 % Also note that Tcf and Ttf can also be abbreviated by their crossing 054 % marker, e.g. Tuc (u2c) and Tdt (d2t), respectively. Similar applies to all the 055 % other wave periods and wave lengths. 056 % (The nomenclature for wave length is similar, just substitute T and 057 % period with L and length, respectively) 058 % 059 % <----- Direction of wave propagation 060 % 061 % <--TMm--> 062 % <-TmM-> : : 063 % M : : M : 064 % / \ : M /:\_ : M_ M 065 % F \ : / \m/ : \ : /: \ / \ 066 % \ : / : \ : / : \ / \ 067 % \ : / : \ : / : \_ _/ \_ L 068 % \_ : / : \_m_/ : \m_/ \m/ 069 % \m/ : : : : 070 % <-----TMM-----> <----Tmm-----> 071 % 072 % 073 % TmM = Period between minimum and the following Maximum 074 % TMm = Period between Maximum and the following minimum 075 % TMM = Period between Maximum and the following Maximum 076 % Tmm = Period between minimum and the following minimum 077 % 078 % See also wavedef, ampdef, crossdef, tpdef 079 080 % history: 081 % revised pab 15.05.2000 082 % - minor corrections for Tcb 083 % - added Tmm, TMM, etc..... 084 % revised pab 21.01.2000 085 % - updated help header 086 % - changed from: Wave propagating direction 087 % to: Direction of wave propagation 088 % by Per A. Brodtkorb 19.09.1999 089 090 091 more on 092 help perioddef 093 more off 094
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