Three-dimensional analysis method for motion trails of falling rocks in any shape of rock-soil slope

A technology of arbitrary shape and motion trajectory, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as the gap in the prediction results of rockfall motion trajectory, and achieve the effects of reducing calculation time, accurate contact area, and narrowing the gap

Pending Publication Date: 2021-01-22
ARMY ENG UNIV OF PLA
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  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a three-dimensional analysis method for rockfall trajectory of any sha

Method used

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  • Three-dimensional analysis method for motion trails of falling rocks in any shape of rock-soil slope
  • Three-dimensional analysis method for motion trails of falling rocks in any shape of rock-soil slope
  • Three-dimensional analysis method for motion trails of falling rocks in any shape of rock-soil slope

Examples

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Embodiment

[0184] Validation of typical movement patterns of falling rocks

[0185] The falling movement mode of falling rocks generally appears after the dangerous rock collapses and separates from the protruding rock mass, or after rolling to a steep slope such as a cliff, or after colliding with the slope and rebounding, it is one of the most important movement modes of falling rocks. The flying and falling process generally ignores the influence of air resistance and only considers the effect of gravity, so it is easier to simulate than other motion modes, and the calculation results of the motion trajectory can be verified according to the theoretical solution. In the following, two calculation examples of two-dimensional flat throwing motion and three-dimensional oblique throwing motion are used to compare the motion trajectory of theoretical solution and numerical simulation results.

[0186] Assuming that the mass of a certain spherical falling rock is m=10221kg, and the radius R...

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Abstract

The invention discloses a three-dimensional analysis method for the motion trails of falling rocks in any shape on a rock-soil side slope. The method comprises the following steps: establishing a three-dimensional model of falling rocks in any shape and a slope surface under a system coordinate system; judging whether falling rocks contact with the slope surface at each moment through a contact search algorithm; calculating the contact force when the falling rocks are in contact with the slope surface through a contact collision model; establishing a falling rock motion equation according to the contact force and the gravity effect; and solving the motion equation by adopting a time step method to obtain the motion trails of the falling rocks. The falling rock and slope model in any shapeis established, the falling rock motion equation is established according to the contact search algorithm and the contact collision model between the falling rocks and the slope, the three-dimensionalmotion trail of the falling rocks along the slope is simulated, and the difference between the prediction result of the motion trails of falling rocks and the actual situation is reduced.

Description

technical field [0001] The invention belongs to the field of simulation and analysis of rockfall motion tracks in mountainous areas, and in particular relates to a three-dimensional analysis method for rockfall motion tracks of rock-soil slopes with arbitrary shapes. Background technique [0002] The prediction method of rockfall trajectory refers to analyzing the process of rockfall movement along the slope by using on-site monitoring or computer simulation methods according to the location of dangerous rock mass and complex mountainous terrain, and predicting the trajectory and speed of rockfall. The prediction results of rockfall trajectory determine the threat range of rockfall disasters, and the design of line selection and winding before the construction of mountainous line projects (highways, railways, oil and gas pipelines, etc.), as well as important infrastructure (houses, bridges, tunnels, etc.) The design of the protection range of the cave, etc.) is of great ref...

Claims

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Application Information

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IPC IPC(8): G06T17/05G06T17/20G06Q10/04
CPCG06T17/20G06T17/05G06Q10/04
Inventor 方秦闫鹏孔祥振张锦华
Owner ARMY ENG UNIV OF PLA
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