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为了研究大直径钢筒仓在温度作用下产生的温度侧压力,首先对由于温度作用产生的附加侧压力的各种经典计算方法进行对比研究,分析其内在的联系和区别;然后建立考虑散料和仓壁间相互作用的三维有限元接触模型来模拟温度作用对钢筒仓侧压力的影响.散料和仓壁采用可以考虑温度作用下两者变形的柔-柔接触类型和面-面接触方式.选取两种高径比和三种类型的温度作用来分别模拟温度对深仓和浅仓侧压力的影响,并将数值计算结果与经典方法和试验得出的温度侧压力进行对比分析.通过参数分析研究了不同径厚比、散料的弹性模量和泊松比对侧压力的影响,提出计算温度侧压力的改进方法.
In order to study the temperature-side pressure of large-diameter steel silos under temperature effect, we first make a comparative study on various classical calculation methods of additional side pressure due to temperature and analyze their inherent relations and differences. Then, And the interaction between the silo walls to simulate the influence of temperature on the lateral pressure of the steel silo bulk and silo wall using soft-soft contact type and surface-to-surface contact that can account for the deformation of both Two types of height-diameter ratio and three types of temperature effects were selected to simulate the influence of temperature on the pressure in the deep and the shallow chamber respectively. The numerical results were compared with those obtained by the classical method and the experimental temperature side pressure. The influence of different aspect ratio, the elastic modulus of bulk material and Poisson’s ratio on the lateral pressure was studied through parameter analysis. An improved method to calculate the temperature side pressure was proposed.