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WANG Hao, HUANG Jian, HUANG Xiang, YUAN Jingqing, HE Zicheng. A Method of Using Unity3D to Simulate the Whole Process of Three-dimensional Movement of Rockfall[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20210237
Citation: WANG Hao, HUANG Jian, HUANG Xiang, YUAN Jingqing, HE Zicheng. A Method of Using Unity3D to Simulate the Whole Process of Three-dimensional Movement of Rockfall[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20210237

A Method of Using Unity3D to Simulate the Whole Process of Three-dimensional Movement of Rockfall

doi: 10.13203/j.whugis20210237
Funds:

National Innovation Research Group Science Fund (No.41521002)

  • Received Date: 2021-05-17
  • Objectives: Rockfall occur frequently in the mountainous areas of southwest China, which is easy to cause huge casualties and property losses. A rapid simulation method of the collapse process is urgently needed. At present, the commonly used collapse simulation software still has obvious shortcomings, such as low terrain accuracy, failure to consider the structural characteristics of rock mass, failure to realize block collision and fragmentation, etc., and the logic operation based on Central Processing Unit (CPU) only limits the calculation speed. In this paper, a new method for rapid simulation of the three-dimensional motion process of collapse is proposed. Methods: The Unmanned aerial vehicle (UAV) aerial photography modelling combined with field investigation is used to obtain the slope surface model and determine the characteristic parameters of rockfall. The simulation software of large-scale collapse movement process is developed by using Unity3D platform which integrates PhysX physics engine and Central Processing Unit-Graphics Processing Unit (CPU-GPU) parallel computing capability. Results: The software can reproduce the whole process of collapse-impact-fragmentation-accumulation; It can output the three-dimensional trajectory, velocity, energy and jumping height of collapse, which provides reliable basis for the design of collapse prevention and control. Finally, taking Xiejiayan collapse in Nayong, Guizhou Province as a prototype case, three-dimensional simulation and verification of the collapse movement process are carried out. The simulation results of the rockfall accumulation range are in good agreement with the field investigation of the rockfall accumulation range at the bottom of the slope, and the movement characteristics of the simulated single block rock conform to the real physical laws, which indicates the feasibility and practicability of this method. Conclusions: This method can solve the problem of simulation, analysis and visualization of the whole process of three-dimensional movement of rockfall.
  • [1] Lambert Stéphane,Nicot François. Rockfall Engineering[M].John Wiley & Sons, Inc.:2013-02-28.
    [2] Dorren L,Berger F,Putters U S. Real-size experiments and 3-D simulation of rockfall on forested and non-forested slopes[J]. Natural Hazards & Earth System Sciences, 2006, 6(1):145-153.
    [3] Hengxing Lan,C. Derek Martin,C.H. Lim. RockFall analyst:A GIS extension for three-dimensional and spatially distributed rockfall hazard modeling[J]. Computers and Geosciences,2006,33(2).
    [4] Bartingale R, Higgins J D, Andrew R, et al. Colorado Rockfall Simulation Program Version 5.0[C] Highway Geology Symposium. 2009.
    [5] Wang, Yuannian. Three-dimensional rock-fall analysis with impact fragmentation and fly-rock modeling.[D] The University of Texas at Austin.,2009.
    [6] Yung Piao Chiu,Yan Chyuan Shiau,Shu Jen Song. A Study on Simulating Landslides Using Unity Software[J]. Applied Mechanics and Materials,2015,3926.
    [7] Ondercin, Matthew. An Exploration of Rockfall Modelling through Game Engines.[D] Queen's University (Canada).,2016
    [8] Sala, Zac. Game-Engine Based Rockfall Modelling:Testing and Application of a New Rockfall Simulation Tool.[D] Queen's University (Canada).,2016
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A Method of Using Unity3D to Simulate the Whole Process of Three-dimensional Movement of Rockfall

doi: 10.13203/j.whugis20210237
Funds:

National Innovation Research Group Science Fund (No.41521002)

Abstract: Objectives: Rockfall occur frequently in the mountainous areas of southwest China, which is easy to cause huge casualties and property losses. A rapid simulation method of the collapse process is urgently needed. At present, the commonly used collapse simulation software still has obvious shortcomings, such as low terrain accuracy, failure to consider the structural characteristics of rock mass, failure to realize block collision and fragmentation, etc., and the logic operation based on Central Processing Unit (CPU) only limits the calculation speed. In this paper, a new method for rapid simulation of the three-dimensional motion process of collapse is proposed. Methods: The Unmanned aerial vehicle (UAV) aerial photography modelling combined with field investigation is used to obtain the slope surface model and determine the characteristic parameters of rockfall. The simulation software of large-scale collapse movement process is developed by using Unity3D platform which integrates PhysX physics engine and Central Processing Unit-Graphics Processing Unit (CPU-GPU) parallel computing capability. Results: The software can reproduce the whole process of collapse-impact-fragmentation-accumulation; It can output the three-dimensional trajectory, velocity, energy and jumping height of collapse, which provides reliable basis for the design of collapse prevention and control. Finally, taking Xiejiayan collapse in Nayong, Guizhou Province as a prototype case, three-dimensional simulation and verification of the collapse movement process are carried out. The simulation results of the rockfall accumulation range are in good agreement with the field investigation of the rockfall accumulation range at the bottom of the slope, and the movement characteristics of the simulated single block rock conform to the real physical laws, which indicates the feasibility and practicability of this method. Conclusions: This method can solve the problem of simulation, analysis and visualization of the whole process of three-dimensional movement of rockfall.

WANG Hao, HUANG Jian, HUANG Xiang, YUAN Jingqing, HE Zicheng. A Method of Using Unity3D to Simulate the Whole Process of Three-dimensional Movement of Rockfall[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20210237
Citation: WANG Hao, HUANG Jian, HUANG Xiang, YUAN Jingqing, HE Zicheng. A Method of Using Unity3D to Simulate the Whole Process of Three-dimensional Movement of Rockfall[J]. Geomatics and Information Science of Wuhan University. doi: 10.13203/j.whugis20210237
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