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Ecological route planning method considering underwater radiation sound of ship

A technology of radiated sound and radiated noise, which is applied in the field of ecological route planning considering underwater radiated sound of ships, can solve the problems of interfering with aquatic organisms and having a large impact on aquatic organisms, and achieves real-time and accuracy, simplifies operations, and improves computing. The effect of precision

Pending Publication Date: 2022-08-02
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the past, the design and optimization decision-making process of the route did not involve the impact of ship noise on aquatic organisms during ship navigation, but a large number of modern studies have shown that ship noise has a huge impact on aquatic organisms. The radiated noise field of typical ships during the navigation process is studied and analyzed. The results show that the peak value of the sound pressure level of the underwater radiated noise of inland ships mainly appears in the low frequency band (30-80Hz), which will interfere with aquatic organisms to a certain extent.

Method used

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  • Ecological route planning method considering underwater radiation sound of ship
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  • Ecological route planning method considering underwater radiation sound of ship

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Embodiment 1

[0102] see Figure 1 to Figure 5 , an ecological route planning method considering underwater radiated sound of ships, including the following steps:

[0103] 1) Establish the sound source level model of the ship's radiated noise, and use the ship's radiated noise sound source level model to calculate the sound source level of the ship's radiated noise;

[0104] The sound source level model of the radiated noise of the ship is obtained by training the neural network with the training sample set;

[0105] The neural network includes but is not limited to radial basis function RBF neural network, BP neural network or cerebellar model neural network.

[0106] The sound source level model of the radiated noise of the ship includes an input layer, a hidden layer and an output layer; wherein, the input layer has n neurons, the hidden layer has p neurons, and the output layer has q neurons;

[0107]The input variable of the input layer is denoted as x=(x 1 ,x 2 ,...,x n ); x n ...

Embodiment 2

[0191] An ecological route planning method considering underwater radiated sound of ships, including the following steps:

[0192] 1. Establish the sound source level model of the radiated noise of the ship

[0193] 1.1 Establish the input training samples and output training samples of the ship's radiated noise sound source level model, calculate the set response of the ship to the environmental elements and the corresponding ship speed, and calculate the ship radiated noise sound source level according to the ship speed.

[0194] The input training sample variables are the ship's fore and aft draught, the ship's fore and aft draught, the ship's lateral wind area, the ship's longitudinal wind area, the ship's initial stability height, the windboard angle, the wind speed, the waveboard angle, the wave height, the wave period, the flow direction, Flow rate, host output power;

[0195] The output training sample variables are the ship speed and the real-time ship radiated noise...

Embodiment 3

[0283] An ecological route planning method considering underwater radiated sound of ships, the contents are as follows:

[0284] 1) Establish the sound source level model of the ship's radiated noise, and use the ship's radiated noise sound source level model to calculate the sound source level of the ship's radiated noise;

[0285] 2) Establish the radiated noise field of ships in different voyages and channels;

[0286] 3) Establish a grid area for ship routes;

[0287] 4) According to the radiated noise field of the ship, in the grid area of ​​the ship's route, select the best route, the corresponding waypoint, and the output power of the ship's main engine in the corresponding segment.

[0288] in, figure 1 is the neural network training block diagram. like figure 1 As shown, the training samples of the neural network consist of input samples and output samples. In the present invention, the input sample includes four parts: ship element, channel element, aquatic orga...

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Abstract

The invention discloses an ecological route planning method considering underwater radiation sound of a ship, and the method comprises the steps: 1), building a radiation noise sound source level model of the ship, and calculating the radiation noise sound source level of the ship through the radiation noise sound source level model of the ship; 2) establishing a radiation noise field of the ship in different route segment channels; 3) establishing a grid area of a ship route; and 4) according to the radiation noise field of the ship, selecting the optimal ship route, the corresponding route point and the ship main engine output power adopted in the corresponding route segment in the grid region of the ship route. According to the method, the ship main engine output power of each leg is optimized while the ship route is optimized and designed, so that the ship is controlled from the two aspects of the ship route and the main engine output power, and the purpose that the influence of ship noise on aquatic organisms is minimum is achieved.

Description

technical field [0001] The invention relates to the field of ship route planning, in particular to an ecological route planning method considering underwater radiated sound of ships. Background technique [0002] Electronic Chart Display and Information System (ECIDS) is a commonly used ship navigation aid platform and auxiliary decision-making system. ECDIS has a route design function, and realizes the design function of the shortest route through the operator's input of steering points. However, the current route design of ECDIS is based on the experience of sailors, and the impact of ship radiated noise on aquatic organisms cannot be considered. [0003] In order to build an ecological waterway, the planning and design of the route is an essential and important part. The principles of route design and optimization are: safety and economy. First of all, on the premise of ensuring that the ship arrives at the destination port safely and smoothly, and then consider the hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/08G06F30/23G06F30/27G06N3/08G06F111/10G06F119/10
CPCG06Q10/08355G06F30/23G06F30/27G06N3/08G06F2111/10G06F2119/10Y02T90/00
Inventor 李文杰雷宗霖杜洪波万宇杨胜发
Owner CHONGQING JIAOTONG UNIVERSITY
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