Simulation and calculation method of motion response of underwater towing system under high sea condition

A technology of motion response and simulation calculation, applied in the field of underwater towing system, can solve problems such as difficulty in providing reference value for marine applications, and the influence of acoustic and magnetic bait simulation effects on the stability of underwater vehicles

Active Publication Date: 2019-09-27
NAVAL UNIV OF ENG PLA
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Problems solved by technology

In actual marine applications, the towed system will inevitably be disturbed by water surface waves under different sea conditions, and these disturbances often have a greater impact on the simulation effect of the acoustic magnetic bait and the stability of the underwater vehicle
There are few studies on the influence...

Method used

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  • Simulation and calculation method of motion response of underwater towing system under high sea condition
  • Simulation and calculation method of motion response of underwater towing system under high sea condition
  • Simulation and calculation method of motion response of underwater towing system under high sea condition

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specific Embodiment

[0160] Set the following parameters as the default parameters, and the parameters of the streamer are shown in Table 1.

[0161] Table 1 Streamer parameters

[0162]

[0163] The additional quality coefficient of the guide cable and the tow cable is 1.0, and the discretization is 130 segments, that is, Δs is 1m. According to the stable condition, the time step Δt is 1ms.

[0164] For the sea surface phenomena corresponding to the three high sea state environments of 4, 5, and 6, the Beaufort wind scale is selected as the reference basis for the wave level, and the corresponding sea surface wind scale can be obtained, as shown in Table 2.

[0165] Table 2 Beaufort Scale

[0166]

[0167] The sea surface wind speed U is the maximum value of the wind speed corresponding to each level of sea conditions, the total number of waves M=200, the aircraft is set to a depth of 15m underwater, and the speed vx=2m / s.

[0168] The calculation parameters of wind speed and irregular wa...

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Abstract

The invention relates to a simulation and calculation method of the motion response of an underwater towing system under a high sea condition. The simulation and calculation method comprises the following steps of firstly, constructing a towing cable control equation; calculating a wave interference force and substituting the wave interference force into a towing cable control equation; then calculating a boundary condition and calculating an initial condition; finally, combining a towing cable control equation, the boundary condition calculation and the speed differential definition v = dx/dt to form a towing cable parameter calculation formula simulating the influence of the waves; inputting the operation parameters of the aircraft, the sea conditions and the parameters of the towing cable, and substituting the parameters into the calculation formula to obtain the simulation data and the simulation curve of the steady state cable type and the tension of the towing cable. The invention further provides a bridge lowering demolition construction method based on the demolition device. According to the method, an irregular wave data model which is extremely close to a real marine environment is constructed by utilizing a linear wave superposition method and a spectral analysis principle, and the reference significance is provided for the bait simulation effect of a dragging system and the navigation safety evaluation of an underwater vehicle.

Description

technical field [0001] The invention relates to the technical field of underwater towing systems, in particular to a simulation calculation method for motion responses of underwater towing systems under high sea conditions. Background technique [0002] The underwater towed system is widely used in the fields of marine resource exploration, anti-submarine warfare, anti-torpedo and torpedo actual combat index assessment. The underwater vehicle equipped with a towed line array can be used as a torpedo acoustic and magnetic decoy or target, and its hydrodynamic characteristics directly It affects the rapidity, maneuverability and stability of the entire underwater vehicle system, so the research on the hydrodynamic characteristics of the underwater towed system has important theoretical significance and engineering practical value. In actual marine applications, the towed system will inevitably be disturbed by water surface waves under different sea conditions, and these distur...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 文无敌王冲霄刘忠乐宋伟
Owner NAVAL UNIV OF ENG PLA
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