A design wave height calculation method for typhoon-affected sea areas based on the principle of maximum entropy

A maximum entropy, typhoon technology, applied in computing, special data processing applications, instruments, etc., can solve the problem of not considering the impact of typhoon wave height

Inactive Publication Date: 2015-08-19
OCEAN UNIV OF CHINA
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Problems solved by technology

However, this method does not consider the influence of typhoon factors on wave height, and ignores the objective fact that extreme sea conditions often occur during typhoons or hurricanes

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  • A design wave height calculation method for typhoon-affected sea areas based on the principle of maximum entropy
  • A design wave height calculation method for typhoon-affected sea areas based on the principle of maximum entropy
  • A design wave height calculation method for typhoon-affected sea areas based on the principle of maximum entropy

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Embodiment Construction

[0045] Such as figure 1 As shown, below in conjunction with accompanying drawing and embodiment the embodiment of the present invention is described in further detail:

[0046] Step 1: Determine the constraint conditions of the discrete maximum entropy distribution function of the number of typhoons:

[0047] The annual number of typhoons affecting a certain sea area is set as a random variable, which can constitute a discrete distribution. Since the path and number of occurrences of typhoons are different every year, it is assumed that the probability of occurrence number i is p i , then the entropy of typhoon landing times is defined as

[0048] H ( p 1 , p 2 , . . . , p ∞ ) = - Σ ...

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Abstract

The invention discloses a new method for calculating typhoon-influenced sea area designed wave height based on a maximum entropy principle, which comprises the steps of: 1, determining a constraint condition of a typhoon time discrete maximum entropy distribution function; 2, deducing a typhoon time discrete maximum entropy distribution mode; 3, determining a typhoon time distribution distance integral explicit expression; 4, deducing an undetermined parameter equation set relative to a distribution distance; 5, constructing a novel nest composite maximum entropy distribution mode for deducing a typhoon-influenced sea area designed wave height; and 6, verifying the effectiveness of the novel method. The invention considers the influence of the typhoon factor to the extreme value wave height distribution under the condition of fully considering the apriority and the manual hypothesis, thereby improving the accuracy of deducing the typhoon-influenced sea area multiple year return designed wave height. The integral explicit expression of the new mode ensures that the method is convenient for engineering application, and 8 undetermined parameters ensure that the new mode can be used for more accurately and flexibly fitting observation data of different sea areas, therefore, the method has wider adaptability.

Description

technical field [0001] The invention relates to a design wave height calculation method in typhoon-affected sea areas, specifically seeking a design wave height calculation method that considers typhoon influence factors, probability distribution and avoids a priori and artificial assumptions. Background technique [0002] In marine engineering design, the wave height is an important marine environmental factor, and it is of great significance to accurately determine the design wave height value once in many years for disaster prevention and mitigation. The traditional design wave height calculation method is to artificially select probability curves (such as Gumbel curve, Pearson-III curve, etc.) from the measured annual extreme wave height data series, determine the line type under a certain line fit criterion, and extrapolate to calculate the design wave height once in many years value. However, none of these methods fully considered the impact of typhoons on extreme wav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 王莉萍刘桂林陈柏宇王莉
Owner OCEAN UNIV OF CHINA
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