液压支架结构疲劳动态可靠性评估方法  

Fatigue dynamic reliability assessment method of hydraulic support structure

作　　者：丁飞[1] 王谦[1] 

机构地区：[1]辽宁工程技术大学机械工程学院

出　　处：《中国安全科学学报》2015年第6期86-90,共5页China Safety Science Journal

基　　金：辽宁省工业企业科技特派行动合作项目(2013KTP011);辽宁省教育厅科学研究项目(L2012120)

摘　　要：为保障煤矿井下采煤工作面安全生产,需要时刻掌握液压支架的可靠性情况,以便及时维护和保养,使液压支架可靠性维持在较高水平。基于应力-强度干涉理论,建立液压支架结构疲劳动态可靠性分析模型,并结合使用现场实测压力数据与液压支架生产企业再制造情况,对某常用液压支架进行动态可靠性评估。结果表明:该模型适用于对液压支架可靠性进行概率解释;综合机械化采煤工作过程中,顶板周期来压使液压支架承受的不稳定载荷服从双峰正态分布;用16Mn的P-S-N曲线代替Q460计算剩余疲劳强度,可以获得可靠度的保守数值。Based on stress-strength interference theory,a fatigue dynamic reliability analysis model was built for hydraulic support structure. A dynamic reliability assessment was carried out for a certain commonly used hydraulic support according to measured pressure data and remanufacturing situation of the manufacturer. The results show that the model is suitable for probabilistic explanation of hydraulic support reliability,the unstable loads for hydraulic support which caused by periodic roof pressure in comprehensive mechanized mining process obey bimodal normal distribution,and the conservative data of reliability can be obtained by using P-S-N curve of 16 Mn instead of Q460 to calculate residual fatigue strength.

关 键 词：液压支架 P-S-N曲线 疲劳强度 动态可靠性 可靠性评估 

分 类 号：X924.3[环境科学与工程—安全科学] TD353[矿业工程—矿井建设]