反铲式挖泥船反铲装置的理论分析与动态仿真

采用虚拟样机技术,对液压挖泥船反铲工作装置进行了六连杆机构自由度的计算,并进行了三维实体建模、虚拟装配、运动仿真与动态模拟,对潜在设计问题进行了预测分析。在实验室内对土壤进行反铲斗挖掘做了试验研究,将所观察到的实验值与仿真值进行了比较,并分析了运动仿真的正确性与实用性,为挖泥船物理样机的制造和新机型设计方案的评估提供有效参考数据。

Research on pore microstructure features for dredger fill based on mercury intrusion method

The material composition and microstructure have a comprehensive influence on geological engineering properties of dredger fill.The porosity of the dredger fill is an important characteristic of microscopic structure.Taken dredger fill from Binhai New Area in Tianjin as research object,the distribution trend of pore is obtained by granularmetric analysis,mineral composition analysis and mercury intrusion method.By discussing the variation regulation of dredger fill in two different kinds of processing methods,certain theoretical basis is provided for evaluating the engineering geological properties of dredger fill.It can be concluded from the test results that after drainage treatment,the porosity decreased and the structure unit changed from the relatively loose state to aggregate state.In certain depth range,the consolidation effect of dredger fill with drainage treatment is better than that without drainage treatment.