SPH wave simulation method applied to helicopter ditching

A simulation method and helicopter technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of large amount of calculation, inconvenient, time-consuming implementation, etc., and achieve the effect of reducing calculation time consumption

Pending Publication Date: 2018-11-20
CHINA HELICOPTER RES & DEV INST
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Problems solved by technology

[0005] Using SPH numerical simulation to investigate the mechanical problem of forced landing of helicopters under the condition of waves, the first thing to solve is how to generate wave water bodies. The traditional method is to arrange periodic swinging pusher boards on one side of the water area. Under the push of the pusher boards, Gradually create waves that meet the requirements. This wave-making method is computationally intensive, time-consuming and inconvenient to implement

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  • SPH wave simulation method applied to helicopter ditching
  • SPH wave simulation method applied to helicopter ditching
  • SPH wave simulation method applied to helicopter ditching

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Embodiment Construction

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention.

[0030] The SPH wave simulation method of the present invention creates waves by directly giving wave patterns. According to the hydrodynamic potential flow theory, the velocity and acceleration of each particle in the wavy water area are solved. When the calculation domain is initialized before the SPH flow field calculation, the wave conditions and motion parameters are assigned to the water area particles in the initial state. The present invention considers two typical wave situations: a forward wave and a standing wave.

[0031] Such as figure 1 As shown, the SPH wave simulation method applied to helicopter ditching of the present invention includes: the waveform of a typical wave ...

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Abstract

The invention relates to a PSH wave simulation method applied to helicopter ditching, and belongs to the technical field of the helicopter simulation experiment. The method comprises the following steps: giving waveform of classical wave according to wave shape, wherein the waveform comprises forward wave and standing wave; solving parameters of various particles in a choppy water area, wherein the parameters comprise speed, acceleration and pressure intensity. Through the SPH wave simulation method applied to helicopter ditching disclosed by the invention, the movement and kinetic parameter of various particles in the wave shape can be directly computed according to hydrodynamics rule; the time-consumed previous wave generation computation is unnecessary, the effect of pushing plate for wave-making can be achieved, and the time consumed for computation can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of helicopter simulation experiments, and in particular relates to a SPH wave simulation method applied to helicopter ditching. Background technique [0002] For helicopters operating in special rivers, lakes or sea environments, the ditching performance must be considered in the design. From the perspective of crash resistance, during the impact process, the load imposed on the helicopter by ditching is completely different from that of a ground crash. Therefore, it is necessary to carry out special research on the mechanical problems of helicopter ditching, such as load and motion. In the numerical simulation analysis of helicopter simulation, simulating the characteristics of ditching under different sea conditions is an important guarantee to test the reliability and practicability of helicopter design. Therefore, it is particularly important to use effective wave generation methods in the numerical si...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 陈立霞刘长文马玉杰陈金鹤鲁可武尚景陆召严汪正中
Owner CHINA HELICOPTER RES & DEV INST
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