Analysis Of Instability Problem Of Cohesive Soil Particle Accumulation Based On Complex Network

Granular materials are complex,disorderly stacked particle filling systems.Particle filling systems and related problems often occur in various fields such as engineering geological disasters,chemical and chemical engineering,environmental engineering,geotechnical engineering and transportation.The resolution of these natural sciences and engineering problems depends on how much people perceive the basic mechanical properties of particulate materials.Adhesive particle deposits are the most common and important types of particulate matter in our daily life.Particle materials tend to be characterized by electrostatic forces,water molecules,and cohesive colloids,causing cohesion between the particles.Therefore,the dry particulate material in which no binding force exists in nature is basically absent.When people are looking for solutions to the problems associated with sticky particle filling systems,the researchers have done a lot of theoretical and experimental research on sticky particulate matter,because of the complexity of its properties,although there have been many research results and engineering.Solve the problem,but so far there is no mechanical theory or analysis method that can fully summarize the complex nature of viscous particulate materials and solve the engineering problems associated with viscous particle filling systems.At present,domestic and foreign scholars have carried out a lot of research on rock mass and slope stability problems by using block discrete element and particle discrete element method,and have obtained certain research results.As the research progresses,the research content and process have a bottleneck.The research on soil particle accumulation is often limited to the study of macroscopic parameters of particle accumulation collapse and slope instability,and how its internal structure affects macroscopic However,there are few studies on dynamic response to analyze and explore it.Complex network theory is a mathematical analysis tool that was only known in the 21 st century.Complex network tools have powerful effects in analyzing the inherent causes of the complex structure's macroscopic response.In the field of particulate materials research,the analysis method of the complex network at this stage is only used to analyze the compression process of dense particle packed samples.From the perspective of complex networks,there is little research on the evolution of contact force networks during the collapse or instability of wet soil debris.In this paper,the particle discrete element method is used,and the complex network theory is introduced to analyze and study the stability of viscous particle stacks.The main work of this research is:1.Firstly,this paper firstly uses the discrete element software EDEM to construct the discrete element model of wet pebble particle accumulation and rock slope in natural accumulation state.rock slope under natural accumulation state is constructed by using particle discrete element software EDEM.Simulating the collapse and instability processes of self-weight and external loads.The macroscopic dynamic response of the viscous particle stack was obtained,and the variation of macroscopic physical parameters was analyzed.2.We calculated and analyzed the dynamic topological properties of the granitic force chain of the rocky slope under the action of self-weight and the rocky slope.Considering the center of the viscous particle as the node of the network,the connection of two particles that are in contact with each other and having positive contact force is regarded as the edge of the network,thereby constructing a complex network model of the contact force chain network of the viscous particle accumulation body.For the contact network constructed,this paper uses pajek to obtain three important parameters in the complex network system: degree,clustering coefficient and average shortest path.A force chain topology inside the particle is characterized by the evolution of these complex network parameters during the collapse or instability of the viscous particle stack.3.It is not enough to analyze the mesostructure and network parameters of the particle system separately.The macroscopic response of the particle stack is linked to the mesostructure and network parameters of the particle system.The network parameters of the mesostructure are used to describe the dynamic response of the particle-stacked system under self-weight and external loads.The topological parameters of the force chain topology are used to quantify and characterize the damage and collapse process of the viscous particle stack.