粮仓引风机结构参数不确定性分析与优化  

Uncertainty Analysis and Optimization of Structural Parameters in Grain Silo Induced Draft Fan

作　　者：季彬彬[1] 周杰[1] 陈娟 章悦 张城 JI Bin-bin;ZHOU Jie;CHEN Juan;ZHANG Yue;ZHANG Cheng(School of Mechanical Engineering,Nantong University,Nantong Jiangsu 226019,China)

机构地区：[1]南通大学机械工程学院,江苏南通226019

出　　处：《林业机械与木工设备》2024年第8期51-56,共6页Forestry Machinery & Woodworking Equipment

摘　　要：粮仓引风机的工作性能影响了粮食储存环境的质量,直接关系到粮食的安全与保存效果。为此,提出一套结构参数优化策略,通过精确改进粮仓引风机的结构参数,以提升其工作性能。通过模态分析和子结构分隔,针对关键子结构建立了基于参数区间表征的简化不确定性优化模型,并应用随机有限元分析与相关性分析识别影响固有频率的关键参数。通过响应面分析,实现了参数的精细调整,优化目标是最大化关键固有频率与工作频率之间的差距,避免新的共振点产生。在实测条件下,优化后的引风机展现了更低的振动水平,显著提高了设备的运行稳定性和使用寿命,证明了优化策略的有效性和经济效益,为提升机械设备性能提供了新思路。The operational performance of the induced draft fan in grain silos significantly influences the quality of the grain storage environment,directly affecting the safety and preservation of stored grain.This study introduces a structural parameter optimization strategy to enhance the performance of the grain silo induced draft fan through precise improvements in its structural parameters.Employing modal analysis and substructure division,this research establishes a simplified uncertainty optimization model based on parameter interval characterization for key substructures.It utilizes stochastic finite element analysis and correlation analysis to identify the critical parameters affecting natural frequencies.Through response surface analysis,the study achieves fine-tuning of parameters,with the optimization goal being to maximize the gap between critical natural frequencies and operational frequencies,thereby avoiding the emergence of new resonance points.Under real-world conditions,the optimized induced draft fan demonstrates lower vibration levels,significantly enhancing the equipment's operational stability and service life,thereby proving the effectiveness and economic benefits of the optimization strategy.This method offers a new avenue for enhancing the performance of mechanical equipment.

关 键 词：粮仓引风机 不确定分析 相关性 参数优化 

分 类 号：S379.3[农业科学—农产品加工]