【摘要】 为较准确地预测液压支架的使用寿命,利用支架与围岩的相互作用关系,通过围岩的运动规律,分析出了液压支架外载荷的来源及特征.应用Monte Carlo法进行随机抽样获取载荷谱,统计得到其载荷幅值服从形状参数为1.31,尺度参数为216.96的威布尔分布,而载荷均值服从均值为1 200 N·m,标准差为51.96N·m的正态分布,进而模拟出了液压支架在井下真实的载荷历程.为进一步研究和编制程序载荷谱,进行实验室模拟试验和疲劳寿命预测做好准备.更多还原

【Abstract】 To accurately predict the service life of hydraulic support,the origin and characteristics of the external load of the hydraulic support w ere analyzed using the interaction relationship betw een surrounding rock and hydraulic support based on the movement of surrounding rock. Monte Carlo method is used to obtain the load spectrum. The statistics results show that the load amplitude and the load average obey Weibull distribution W( 1. 31,216. 96) and normal distribution N( 1200,51. 96),respectively. Then,the actual load history of hydraulic support at underground w as simulated. The w ork prepares for further research and compiling load spectrum so as to make the life prediction and simulation test indoor.更多还原