输送机斜撑构件可靠寿命仿真分析
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摘要
针对输送机结构特点,研究给出了输送机结构疲劳可靠寿命计算方法,能够考虑参数的随机性,分析结构可靠寿命及其灵敏度。以某输送机斜撑为对象,建立了疲劳仿真模型,利用试验设计和响应面方法,拟合斜撑疲劳寿命的响应面模型;在此基础上,考虑结构尺寸、载荷、材料性能等的随机性,基于概率功能度量进行了可靠寿命及其灵敏度分析。分析结果表明:斜撑可靠寿命较低,杆宽、凹槽宽度为关键因素。通过改变关键因素的参数,斜撑可靠寿命得到较大的提高。
The calculation method for reliable fatigue life of conveyor structure was given according to the structural features of conveyor,which can be used to analyze the structural reliable life and its sensitivity considering the effect of random factors. Taking inclined strut of a conveyor as an example, the fatigue simulation model was built, and the response surface model of the fatigue life of inclined strut was proposed using the test design and response surface method.On this basis,considering the effect of random factors such as dimension,load and material performance etc.,the reliable life prediction problem could be solved using function measurement approach. The results show that the reliable life of the inclined strut is shorter,and key factors of shorter life are rod width and groove width,and the life of inclined strut has been improved greatly after changing the key factors.
The calculation method for reliable fatigue life of conveyor structure was given according to the structural features of conveyor,which can be used to analyze the structural reliable life and its sensitivity considering the effect of random factors. Taking inclined strut of a conveyor as an example, the fatigue simulation model was built, and the response surface model of the fatigue life of inclined strut was proposed using the test design and response surface method.On this basis,considering the effect of random factors such as dimension,load and material performance etc.,the reliable life prediction problem could be solved using function measurement approach. The results show that the reliable life of the inclined strut is shorter,and key factors of shorter life are rod width and groove width,and the life of inclined strut has been improved greatly after changing the key factors.
引文
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[6]张永强,马宪民,杨洁. Weibull分布中BP参数优化的刮板输送机可靠性寿命预测分析[J].煤炭工程,2017,49(1):106-109.
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[14]闫明,孙志礼,杨强.基于响应面方法的可靠性灵敏度分析方法[J].机械工程学报,2007,43(10):67-71.
[15] Clarke S. M.,Griebsch J. H.,Simpson T. W. Analysis of Support Vector Regression for Approximation of Complex Engineering Analyses[J]. ASME J. Mech. Des. 2005,127(4):1077-1087.
[2] CEMA. Belt Conveyors for Bulk Materials(Sixth Edition)[M].The Conveyor Equipment Manufacturers Association,2007.
[3]张春芝.刮板输送机动力学建模及链环疲劳可靠性研究[D].北京:中国矿业大学(北京),2012.
[4]张强,王海舰,付云飞,等.刮板输送机链轮力学特性及疲劳寿命预测[J].机械强度,2015,178(2):328-336.
[5]张磊,秦文光,代卫卫.刮板输送机链条疲劳可靠性寿命预测[J].煤矿机械,2013,34(9):44-46.
[6]张永强,马宪民,杨洁. Weibull分布中BP参数优化的刮板输送机可靠性寿命预测分析[J].煤炭工程,2017,49(1):106-109.
[7]刘雨.刮板输送机可靠性寿命评价及可靠性分析[D].太原:太原理工大学,2011.
[8]代卫卫,刘混举.基于威布尔分布的刮板输送机可靠性寿命分析[J].机械工程与自动化,2013(1):139-141.
[9]张则荣,樊智敏,王永岩.大型直线振动筛的疲劳寿命及可靠性分析[J].煤炭学报,2014,39(S1):257-261.
[10]李舜酩.机械疲劳与可靠性设计[M].北京:科学出版社,2006.
[11]徐灏.概率疲劳[M].沈阳:东北大学出版社,1994.
[12]高镇同,熊峻江.疲劳可靠性[M].北京:北京航空航天大学出版社,2000.
[13]刘勤,孙志礼,钱云鹏,等.基于概率功能度量的疲劳可靠寿命分析方法[J].兵工学报, 2016,37(8):1530-1535.
[14]闫明,孙志礼,杨强.基于响应面方法的可靠性灵敏度分析方法[J].机械工程学报,2007,43(10):67-71.
[15] Clarke S. M.,Griebsch J. H.,Simpson T. W. Analysis of Support Vector Regression for Approximation of Complex Engineering Analyses[J]. ASME J. Mech. Des. 2005,127(4):1077-1087.