Lateral Pressure Of Silo Numerical Simulation Of Well Pressure During Discharge

Silo is widely used in coal, metallurgy, electric power, building materials, food, cementand other industries.With the rapid development of economic construction, the use of the silois becoming more and more widely.Domestic and foreign experts and scholars study of siloare many, but for the dynamic silo side pressure calculation method of the calculation is stillnot recognized.This article is based on the finite element software ABAQUS, respectively tocalculate the storage of static lateral pressure and lateral pressure, dynamic analysis of theinfluencing factors of the lateral pressure system, studied the discharge mechanism.The mainwork is as follows：（1）Silo and storage model are respectively, the warehouse wall simplified as rigid linematerial, storage choose Drucker-Prager constitutive model, the storage of the frictionbetween the warehouse wall chooses firm-soft contact aspects of contact, the grid fromcenter to both sides, from top to bottom gradually the dividing method of encryption, andchoose the ALE adaptive classification rules to solve the problem of large deformation whenunloading.（2）Through the finite element simulation to calculate the storage in the static condition ofthe size of the silo, the lateral pressure and distribution, with Janssen formulas, such as theUnited States standard, ISO standard comparison, analysis of shortcomings.（3）Analysis of storage silo wall under the discharge side pressure of the size anddistribution, the results and the static simulation results, and China, America and so on wereanalyzed;Is derived by static and dynamic numerical analysis contrast, silo wall underunloading lateral stress increment amplitude and dynamic pressure coefficient, and comparedwith standard analysis.（4）All parameters of the change under the static and dynamic storage, analysis and storagemodulus of elasticity, the density of gravity, dilatancy Angle, and storage and warehouse wallfriction coefficient on the warehouse wall lateral pressure and the influence of the powercoefficient variation law, find out the discharging the most unsafe areas in the warehousewall;Under the various parameters, the results of numerical simulation of the static, dynamicof power coefficient of the size and distribution are obtained.（5）Silo lateral pressure under the discharge mechanism is analyzed.through the static,dynamic lateral pressure simulation results, the storage density, to simulate the depth changeconsidering storage density change law are obtained.The results show that the discharge whenthe storage density with height change is bigger, especially near the maximum lateral pressure place, the rapid increase of storage density leads to the increase of its compactness, increasethe storage the dilatancy of the scope, to produce the maximum lateral pressure.