掘进机回转平台强度有限元分析  

Finite Element Analysis in the Strength of Slewing Platform on Tunnellers

作　　者：王军[1] 马若丁[1] 杨军 

机构地区：[1]吉林大学机械科学与工程学院 [2]内蒙古北方重工业集团有限公司

出　　处：《工程机械》2009年第1期49-52,共4页Construction Machinery and Equipment

摘　　要：针对某掘进机回转平台早期开裂失效问题,采用有限元法对回转平台的强度进行分析,建立回转平台和工作机构的整体有限元模型,采用接触单元模拟回转轴承内外圈与滚动体的作用,用梁单元和杆单元相结合的方法建立工作机构模型,以模拟不同工况的载荷。对最大截割头截割力和最大横摆力联合作用的极限工况进行模拟,得到了结构的总体应力分布和变形。分析回转平台失效的原因,并对危险部位的结构进行改进和强度分析,结果表明,改进后的结构能有效地降低危险部位的应力峰值。Aiming at the premature fraction failure of the slewing platform on a tunneller,the strength of the slewing plat-form is analyzed using finite element approach.A finite element model for entire slewing platform and operating mechanism is established.The action between outer race of slewring and rolling body is simulated with con-tact elements.Operating mechanism model is estab-lished using combined beam elements and rod elements to simulate loads of different work conditions.The ex-treme work condition of joint action of maximum cutting force of cutting head and maximum traverse swinging force is simulated and stress distribution and distortion of overall structure are obtained.The results show that the improved structure reduced effectively the stress peak on hazardous area.

关 键 词：回转平台 应力 有限元 非线性 

分 类 号：TU621[建筑科学—建筑技术科学]