Influence of rock morphology on the dynamic response of flexible rockfall nets under rockfall impacts

IF 3.7 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-08 DOI:10.1007/s10064-025-04285-0

Changrui Jin, Bo Peng, Wensheng Liu, Ganghai Huang, Dongliang Huang, Guoshun Lv, Le Liu, Quan Dai, Lianheng Zhao

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引用次数: 0

Abstract

Assessing the dynamic response of flexible rockfall nets under rockfall impacts is a nonlinear dynamic problem. Modelling rockfalls with realistic morphological features can help investigate the effects of their morphological characteristics on the dynamic response of flexible rockfall nets. This paper aims to establish a standardised process for reconstructing a computational model of rockfalls and to analyse the influence of rockfall morphology on the dynamic response of a flexible rockfall net. First, four morphological parameters, namely, the aspect ratio (AR), sphericity (SP), convexity (CO), and angularity (AN), are used to characterise the rockfall morphology. Second, a standardised processing procedure is proposed for the rockfall model, where differences in size and orientation are eliminated via translation, magnification and rotation. Third, the voxelisation method is used to transform the rockfall model into a sphere-based model suitable for numerical simulation. Finally, the dynamic response of a flexible rockfall net under impact conditions is investigated via sphere discontinuous deformation analysis (SDDA), with rockfall models exhibiting different morphological characteristics. The results show that an increase in CO and AN significantly benefits the local deformation of the flexible rockfall net and that an increase in SP inhibits the overall failure of the flexible rockfall net.

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岩石形态对落石冲击下柔性落石网动力响应的影响

落石冲击下柔性落石网的动力响应评估是一个非线性动力学问题。模拟具有真实形态特征的落石，有助于研究其形态特征对柔性落石网动力响应的影响。本文旨在建立一个标准化的岩崩计算模型重建过程，并分析岩崩形态对柔性岩崩网动力响应的影响。首先，利用长宽比（AR）、球度（SP）、凸度（CO）和角度度（AN）四个形态参数来表征岩崩形态。其次，提出了岩崩模型的标准化处理程序，其中通过平移、放大和旋转消除了大小和方向的差异。第三，采用体素化方法将岩崩模型转化为适合数值模拟的球基模型。最后，通过球不连续变形分析（SDDA）研究了冲击条件下柔性落石网的动态响应，并采用不同形态特征的落石模型。结果表明，CO和an的增加显著有利于柔性落石网的局部变形，SP的增加抑制了柔性落石网的整体破坏。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.