摘要
为研究不同漏斗倾角立筒仓侧压力,制作了倾角分别为60°、45°和30°的三个有机玻璃立筒仓模型,模型内装满福建平潭标准砂。根据仓壁内表面压力传感器测试得到了静态侧压力,同时,利用数值模拟方法计算得到了立筒仓静态侧压力和Mises应力。通过对比分析侧压力试验值、模拟值及规范公式计算值,结果表明:试验值和模拟值分别与侧压力系数取k和k'时的公式计算值相一致,模拟值大于试验值,可以按照模拟方法进行筒仓结构设计;不同漏斗倾角筒仓侧压力和Mises应力分布不同,侧压力绝对最大差值出现在30°和60°漏斗倾角筒仓仓壁底部,绝对最小差值出现在距仓壁底部0.4 m高度;各测点处三个筒仓侧压力大小排序不同,大致分三个变化阶段,但45°漏斗倾角筒仓侧压力始终处于另两者之间;30°漏斗倾角的较大Mises应力分布范围与另两者不同。
In order to study the wall pressure of the single silo with different hopper angles,three organic glass silo models with the hopper angle of 60°,45° and 30° were made,and all silos were filled with Fujian Pingtan standard sand. The static wall pressures were obtained from pressure sensors inside the silos; meanwhile,the numerical simulation method was also employed to calculate the static wall pressure and Mises stress. Then the static wall pressure of experimental,simulated and calculated values with design code formulae were analyzed,and the final comparative analysis results show that the experimental and the simulated values are respectively in consistent with the formula calculation（ the coefficient is k and k＇）,and the simulated values are larger than the experimental ones,therefore,it is workable to design silo with the proposed FEM method. The wall pressure and Mises stress are all affected by the hopper angle. The maximum of absolute differences of wall pressures appears at the bottom of silo models with the hopper angle of 30° and 60°,and the minimum appears at 0. 4 m for each silo model. It can be roughly divided into three stages to rank wall pressure values for each silo model,but the values of the silo model of 45° is always in the middle of them. Furthermore,the larger Mises stress distribution of the silo model of 30° is different from the other two silo models.
出处
《土木工程与管理学报》
北大核心
2016年第5期28-32,共5页
Journal of Civil Engineering and Management
基金
国家自然科学基金(51178164)
郑州市科技计划项目(20140586)
关键词
立筒仓
漏斗倾角
侧压力
数值模拟
silo
hopper angle
wall pressure
numerical simulation
