摘要
提出了一种空间连杆机构的运动可靠性分析方法。首先,延拓连续接触的有效长度模型至空间运动副;其次,完成机构的运动分析及受力分析,为Archard磨损理论的应用提供必要的数据;然后,将原始杆长尺寸误差、铰链间隙误差及磨损量误差均视为随机变量,基于诸影响因素均服从正态分布的假设,对机构进行运动可靠性分析数学建模及计算机编程计算。对铁路货车底门双PSSR型空间连杆机构运动进行可靠性分析,验证了此方法的实用性及有效性。
A new analysis method of motion reliability on spatial linkage mechanism was proposed. Firstly, effective length of the model theory of continuous contact was extended from planar motion pair to spatial one. Secondly, necessary data for Archard wear theory was obtained based on the motion-force analysis. Then, errors of original length, hinge joint-gap and wear allowance were taken as random variables. The mathematical modeling and computer programming were carried out under the assumption that all factors were normal distribution. Finally, the motion reliability was analyzed on double-PSSR-type spatial linkage mechanism of the bottom door of railway vehicle to prove the method to be practical and effective.
出处
《机械设计》
CSCD
北大核心
2015年第7期11-15,共5页
Journal of Machine Design
基金
国家自然科学基金资助项目(11272070)
铁道部计划资助项目(2011J013-E)
关键词
空间连杆机构
运动可靠性
铰链间隙误差
磨损
数学建模
spatial linkage mechanism
motion reliability
hinge joint-gap error
wear
mathematical modeling
