Method and system for predicting hydrodynamic load of drag parachute

A prediction method and drag parachute technology, applied in machine learning, instrumentation, geometric CAD, etc., can solve problems such as long analysis time, large amount of data analysis, and design inseparability, so as to improve accuracy, reduce costs, and improve optimal design efficiency effect

Active Publication Date: 2022-01-11
SHANDONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In some technical solutions, the drag parachute is analyzed with the help of computational fluid dynamics simulation to obtain the hydrodynamic load under a given working condition. However, the design of the drag parachute cannot be separated from the overall deep towing system, and it needs to

Method used

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  • Method and system for predicting hydrodynamic load of drag parachute
  • Method and system for predicting hydrodynamic load of drag parachute
  • Method and system for predicting hydrodynamic load of drag parachute

Examples

Experimental program
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Embodiment 1

[0046] Such as figure 1 As shown, a schematic diagram of the structure of a deep-sea towed multi-channel seismic detection system is provided, in which the hydrodynamic load of the drag parachute affects the position, attitude and detection accuracy of the entire deep towed system. For the drag parachute with exact geometric parameters, the research Its hydrodynamic load under different working conditions is convenient for optimizing the parameters of the drag parachute in the deep towing system and improving its performance.

[0047] Morrison believes that in the mechanical analysis of marine structures, the force acting on the structure is divided into two parts, one is the viscous drag resistance f caused by the relative motion speed of the structure and the fluid D , the other is the attachment mass inertial force f caused by the relative motion acceleration of the structure and the fluid I . Then there is the Morrison equation:

[0048]

[0049] Among them, u x wit...

Embodiment 2

[0083] The present embodiment provides a drag parachute hydrodynamic load prediction system, comprising:

[0084] Selected Design Variables module for determining factors affecting load variables;

[0085] A simulation model creation module is used to set up a drag parachute simulation model;

[0086] The physical test module is used to calibrate the simulation parameters of the simulation model;

[0087] The database building module is used to obtain different design variables and corresponding load variable data according to the virtual simulation to create a database;

[0088] The machine learning module is used for learning according to the data in the database and establishing an agent model;

[0089]The proxy model prediction module is used to receive any design variable within the set range of external input, and output the predicted load variable.

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Abstract

The invention relates to a method and system for predicting the hydrodynamic load of a drag parachute, and the method comprises the following steps: screening influence factors affecting the load of a drag parachute to obtain a design variable; establishing a drag parachute simulation model in virtual simulation software according to the geometric parameters of the drag parachute; calibrating simulation parameters of the simulation model by means of a physical test; adjusting the design variables, carrying out virtual simulation to obtain different load variables, and and forming a database by the multiple sets of design variables and the corresponding load variables; obtaining an agent model of the design variable and the corresponding load variable through machine learning by utilizing data in the database; and inputting any design variable in a set range into the agent model to obtain a corresponding load variable prediction value.

Description

technical field [0001] The disclosure belongs to the technical field of computational fluid dynamics, and in particular relates to a hydrodynamic load prediction method and system for a drag parachute. Background technique [0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The deep sea towed multi-channel seismic detection system (hereinafter referred to as the deep tow system) is the equipment for the precise exploration of deep sea strategic resources such as "combustible ice" near the seabed. figure 1 As shown, it is mainly composed of five parts: mother ship 1, tow cable 2, tow body 3, tow line array 4 and drag parachute 6. Installing a drag parachute at the tail of the towed line array can provide backward dragging resistance, and the dragging resistance and the dragging force provided by the towing body form a pair of balanced forces, which can effectively reduce ...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06F30/28G06F30/10G06N20/00G06F119/14
CPCG06F30/27G06F30/28G06F30/10G06N20/00G06F2119/14Y02T90/00
Inventor 朱向前孙明祺何天浩于凯本宗乐
Owner SHANDONG UNIV
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