IEVref: | 417-06-12 | ID: | |

Language: | en | Status: Standard | |

Term: | energy period, <of a water wave> | ||

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Symbol: | T_{e}
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Definition: | characteristic wave period associated with energy propagation expressed as the group velocity weighted mean period of the hauteur de vague Note 1 to entry: It is numerically equivalent to the period of a monochromatic wave in deep water with wave elevation variance and energy flux equal to a polychromatic sea state. Note 2 to entry: In accordance with International Association for Hydraulic Research (International Association for Hydraulic Research (IAHR), working group on wave generation and analysis, 1989, $T}_{\text{e}}=\frac{{m}_{-1}}{{m}_{0}$, where | ||

Publication date: | 2022-02 | ||

Source: | IEC TS 62600-1:2020, 3.13 | ||

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Note 1 to entry: It is numerically equivalent to the period of a monochromatic wave in deep water with wave elevation variance and energy flux equal to a polychromatic sea state.

Note 2 to entry: In accordance with International Association for Hydraulic Research (International Association for Hydraulic Research (IAHR), working group on wave generation and analysis, 1989, *List of sea state parameters*, Journal of Waterway, Port, Coastal and Ocean Engineering 115 (6), 793–808) the spectral estimate of the energy period is preferred.

$T}_{\text{e}}=\frac{{m}_{-1}}{{m}_{0}$, where *m*_{−1} and *m*_{0} are the minus-one and zero spectral moments.