高边坡阻拦网抗冲击性能数值模拟及工程应用OA

Understanding the coupled effects of impact velocity,rockfall dimensions,and impact angle on the per-formance of flexible barrier nets is crucial for optimizing the design of rockfall protection systems during high-slope blasting operations.Employing energy method principles,this study establishes a mechanical model for analyzing rock-fall impacts on protective barrier nets along high slopes,deriving theoretical correlations between maximum impact force and key parameters,including rockfall mass,velocity,and impact angle,expressed as Fmax=v0 cos α √mk.Additional-ly,a numerical model simulating rockfall impacts on barrier nets was developed,with comprehensive simulations per-formed to analyze both isolated single-parameter effects and coupled interactions among rock mass,velocity,and im-pact angle,elucidating their individual and combined influences on barrier net deformation patterns.Results demon-strate that the peak impact force follows a square-root dependence on rockfall mass while maintaining direct linear proportionality to velocity.Increasing vertical impact angles induces outward displacement of impact points,conse-quently diminishing net deformation.The deformation magnitude is linear,whereas higher impact velocities induce material yielding and subsequent stiffness enhancement,thereby decelerating deformation progression.Parameter sen-sitivity analysis reveals the following significance ranking for multi-factor interactions:impact velocity(33.96％),rockfall radius(32.11％),and vertical impact angle(30.91％).Based on these findings,a dual-layer interceptor net system was designed and implemented.Field applications confirm the system's effectiveness in dissipating kinetic en-ergy through the primary net and in successfully intercepting rockfalls by the secondary net,demonstrating superior terrain adaptability and protective capabilities.