• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Granular matter >Optimal numerical design of bucket elevators using discontinuous deformation analysis
【24h】

Optimal numerical design of bucket elevators using discontinuous deformation analysis

机译：基于不连续变形分析的斗式提升机最优数值设计

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Bucket elevators are efficient machines to transport granular materials in industrial and civil engineering applications. These materials are composed of hundreds, thousands or even more particles, the global behavior of which is defined by contact interactions. The first attempts to analyze the transportation of granular materials were treated by very simple continuum methods that do not take into account these interactions, producing simulations that do not fit the experimental results accurately. Given the internal discontinuity nature of granular media, it is reasonable to use numerical methods to model their behavior, such as discontinuous deformation analysis (DDA)-a member of the discrete element method family that started to be used in the 90s to analyze similar problems. The version of DDA used in the current work treats grains as rigid circular particles with friction, damping and eventually cohesion with the objective of simulating and analyzing in detail the discharge of granular materials with bucket elevators. A deterministic computer code has been implemented and validated against simplified analytical formulae and experimental results taken from the literature. This computer code is then used to obtain optimum two-dimensional bucket geometries under specific working conditions. The optimization aims to maximize transport distance and to minimize remaining material, taking into account bucket velocity and the properties of the grains. The resulting geometries are discussed and compared against standard designs.
机译：斗式提升机是在工业和土木工程应用中运输粒状物料的高效机器。这些材料由数百，数千甚至更多的粒子组成，其整体行为由接触相互作用定义。分析颗粒材料运输的最初尝试是通过非常简单的连续方法进行的，这些方法没有考虑这些相互作用，从而产生了与实验结果不完全吻合的模拟结果。考虑到颗粒介质的内部不连续性，使用数值方法对其行为进行建模是合理的，例如不连续变形分析（DDA）-离散元方法家族的一员，该类在90年代开始用于分析类似问题。当前工作中使用的DDA版本将颗粒视为具有摩擦，阻尼和最终凝聚力的刚性圆形颗粒，目的是通过斗式提升机详细模拟和分析颗粒物料的排放。确定性计算机代码已实现并针对简化的分析公式和来自文献的实验结果进行了验证。然后，该计算机代码用于在特定工作条件下获得最佳的二维铲斗几何形状。该优化的目的是在考虑铲斗速度和谷物特性的情况下最大程度地延长运输距离并最大程度地减少剩余物料。讨论了所得的几何形状，并将其与标准设计进行了比较。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号