基于正交试验的提梁机运行参数对其结构安全影响分析

发布时间：2018-09-01 17:35

【摘要】：为明确在役提梁机的作业状态对其结构安全的影响,以MT900型提梁机为例,结合其作业过程选取走行轨道的支点高差、支点横向偏差、支点纵向偏差和起升荷载冲击系数4个运行参数作为研究提梁机结构安全的影响因素,以这些参数对主梁应力、支腿应力和主梁跨中挠度等的影响程度为试验目标,基于正交试验设计进行相关数值模拟试验,利用极差分析研究各运行参数对结构应力和挠度影响程度的主次顺序,进而研究影响显著因素对提梁机主梁和支腿应力及主梁跨中挠度的影响规律。结果表明:4个运行参数对主梁应力、支腿应力和主梁跨中挠度均有影响,但对支腿应力的影响最为明显;对主梁应力的影响程度从大到小依次为支点纵向偏差、冲击系数、支点高差、支点横向偏差;对支腿应力的影响程度从大到小依次为支点纵向偏差、冲击系数、支点横向偏差、支点高差;对主梁跨中挠度的影响程度从大到小依次为支点高差、冲击系数、支点横向偏差、支点纵向偏差;支点纵向偏差和支点横向偏差是影响提梁机支腿结构安全的主要因素,且这2种偏差与支腿应力基本呈线性关系。
[Abstract]:In order to make clear the influence of the working state of the in-service beam hoist on its structural safety, taking MT900 type beam lifting machine as an example, the height difference of the fulcrum and the lateral deviation of the fulcrum of the walking track are selected in combination with its working process. Four operating parameters, longitudinal deviation of fulcrum and impact coefficient of lifting load, are used to study the safety of beam lifting machine. The effect of these parameters on the stress of the main beam, the stress of the supporting leg and the midspan deflection of the main beam is taken as the test objective. Based on the orthogonal experimental design, the relative numerical simulation tests were carried out, and the order of the influence of the operation parameters on the stress and deflection of the structure was studied by using the range analysis. The influence of significant factors on the stress of the main beam and the supporting leg and the midspan deflection of the main beam is studied. The results show that the four operation parameters have an effect on the stress of the main beam, the stress of the supporting leg and the deflection of the central span of the main beam, but the effect on the stress of the main beam is the most obvious, and the degree of influence on the stress of the main beam is the longitudinal deviation of the fulcrum, the impact coefficient, the degree of influence on the stress of the main beam. The degree of influence on the stress of the leg is the longitudinal deviation of the fulcrum, the impact coefficient, the lateral deviation of the fulcrum, the difference of the height of the fulcrum, and the degree of influence on the midspan deflection of the main beam is the height difference of the fulcrum. The impact coefficient, lateral deviation of fulcrum, longitudinal deviation of fulcrum and lateral deviation of fulcrum are the main factors affecting the safety of supporting leg structure of beam lifting machine, and the two deviations have a linear relationship with the stress of supporting leg.
【作者单位】：石家庄铁道大学河北省交通应急保障工程技术研究中心;石家庄铁道大学桥梁运架设备检测中心;石家庄铁路职业技术学院;
【基金】：中国铁路总公司科技研究开发计划重大项目(2014G008-A) 河北省教育厅科研项目(QN2014173) 河北省交通工程结构力学行为演变与控制重点实验室开放课题(201511)
【分类号】：U445.3

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