| With the coal consumption raised in recent years, the technology development offully-mechanized face had become the focus of coal industry. Due to the proportion ofthick coal seam reached44%in key mines of our country, and the production of thick coalseam reached more than45%in total production. So the research of thick coal seamfully-mechanized technology will be the important factors of high production and highefficiency. And hydraulic support has an important position in fully-mechanized face.The hydraulic support in this paper is a new type support, which is called hyper-statichydraulic support. By using eight columns the support forms hyper-static supporting theory.It has advantages of high reliability, short production cycle, modular production, integratedassembly and so on. With the use of series method, six supports whose highest height is7.5m,7.0m,6.5m,6.0m,5.5m,5.0m have been designed. And they have the same workingresistance. Using ANSYS Workbench to analysis the strength of hydraulic support, and getthe conclusion of the more highest height it reduce, the more safety the support will be.Meanwhile the result verifies the covering concept of Seriation design in hyper-statichydraulic support. Owing to the support of7.5m is the most dangerous, so all the lateranalyses will use the7.5m support as the analysis object.After finishing the checking of hydraulic support static strength, the dynamicperformance of support will be analyzed. So by using the explicit dynamic method inABAQUS software, the impact resistance of canopy of hyper-static hydraulic supportwould be researched. The dynamic response results of canopy under four differentdangerous conditions are obtained. They indicate that the canopy of hydraulic support hasgood impact resistance.Based on the method of mechanical-hydraulic co-simulation, hydraulic system modelin AMESim and rigid body dynamic model of entire hydraulic support in Adams have beenestablished. Firstly the hydraulic system will be verified, which indicates that the hydraulicsystem in this paper meet the requirement of support. Then use the co-simulation methodto simulate dynamic performance of support, which includes rising and dropping support,working resistance load, horizontal force load and impact load. The analysis resultsindicate that the hydraulic system under various working conditions will achieveequilibrium state eventually and satisfy the use requirement.Use the SPH particle method in fluid-structure interaction to analysis the impactresistance of suspension column. The liquid will be established with meshless particle model and the cylinder; piston will be established with finite element model. The results ofexplicit dynamic shows that the equivalent-stress of cylinder did not reach the materialyield limit in the process of impact. What’s more, in order to compare the impact resistancebetween suspension column and traditional column, the traditional column with sameparameters is established. The comparison result show that due to the fluid volume ofsuspension column is more than traditional column, the pressure raised in suspensioncolumn is less than traditional column under the same impact load. So it indicates theadvantage of suspension column in the aspect of impact resistance. |
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