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An ice boat contact process numerical calculation method

A contact process and numerical calculation technology, which is applied in calculation, image data processing, electrical digital data processing, etc., can solve the problems of lack of guarantee of accuracy and scientificity, limited application range, etc.

Active Publication Date: 2019-05-17
HARBIN ENG UNIV
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Problems solved by technology

However, this method usually relies on the model established by the statistical analysis of the existing experimental data, and does not consider the influence of the damage form, ice temperature and strength, and the characteristics of the ship itself. Its accuracy and scientificity are not guaranteed. also relatively limited

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  • An ice boat contact process numerical calculation method
  • An ice boat contact process numerical calculation method
  • An ice boat contact process numerical calculation method

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] This embodiment utilizes the FORTRAN language self-programmed program to implement the numerical calculation method for ice ship contact action process proposed by the present invention. The flow chart of the numerical calculation method for ice ship contact action process proposed by the present invention is as follows figure 1 As shown, the specific process is:

[0032] Step 1. Determine the calculation conditions of the ice ship contact process. The scale of the ice field is set as a cuboid with a length of 150 m, a width of 36 m, and a thickness of 1.8 m. The speed of the icebreaker is set to 3 knots;

[0033] Step 2, according to the physical and mechanical parameters and scales of the ice field, set the distance between the ice material points to Δx=L / 240, so that the ice field is discretized into a series of ice materia...

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Abstract

The invention discloses an ice boat contact process numerical calculation method, and belongs to the field of ice region ship navigation performance calculation. The method is characterized by carrying out the numerical simulation and calculation of the ice boat contact process by combining a near-field dynamics method and an ice boat contact area recognition method, firstly, dispersing an ice field solid structure into a series of ice substance points, and initializing the density, volume, speed and acceleration parameters of all the ice substance points; dispersing the ship body three-dimensional model needing to be calculated into a series of quadrilateral surface element forms; adopting an ice-boat contact area recognition algorithm to carry out the contact judgment on all ice materialpoints and a ship body structure at the current moment and the calculation of an ice load; calculating the crushing condition of the sea ice particles under the contact action at the current moment based on a near-field dynamics method; and calculating sea ice breaking by using an ice boat contact area and a near-field dynamics method in each time step until the maximum time step is reached. Theice boat contact detection method can effectively carry out the contact identification on the ice particles and the boat body and calculate the transient ice load.

Description

technical field [0001] The invention belongs to the field of ship navigation performance calculation in ice regions, and in particular relates to a method for forecasting transient ice load during ice ship contact and numerical calculation method for sea ice breaking process. Background technique [0002] With global warming, the potential political, economic, technological and military values ​​of the polar regions have become increasingly prominent, and have become an important strategic location for all countries in the world. Countries around the world, including my country, are paying more and more attention to polar scientific research and Development work. As an important means of transportation to ensure safe navigation in polar regions, icebreakers play an irreplaceable role. Icebreakers mostly sail in polar regions or areas with large ice coverage, and sea ice will become the main factor affecting the performance of icebreakers. The real ship test and model test r...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/00
CPCY02T90/00
Inventor 叶礼裕郭春雨王超韩康汪春辉徐佩熊伟鹏张媛
Owner HARBIN ENG UNIV
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