Simulating research on rod strings gyro effect caused by eccentric rotation in circular tube
Based on the influences of eccentrical rotating inertial centrifugal force and axial force on the rod strings lateral bending deformation, the finite beam element model of rod strings bending deformation is established. The constraint to rod strings bending deflection exerted by inwall of circular tube and the distinction of the constraint to rod strings deflection because of the different gaps between rod string to circular tube and coupling to circular tube are both taken into account. Meanwhile, removable spring elements with two directions are adopted, by which the non-linear contact problem between the rod string and circular tube is well resolved. Combining space beam element and spring elements with two directions, the corresponding finite element simulating program is also developed. Several simulating results can be shown as follows: eccentric rotation of rod string is able to produce gyro effect in vertical circular tube; The shape of the rod strings deformation is a spiral which is thin on the upper-part and dense on the under-part; Gyro wave numbers are affected obviously by rotating speed, eccentricity, axial concentrated force, axial distributed force and length of the rod string.
Slender rod string Vertical circular tube Eccentric rotation Simulating model Gyro effect
Shimin Dong Wansheng Zhang Guohong Chai Mingming Xing Hong Zhang
Mechanical Engineering College, Yanshan University, Qinhuangdao 066004, PR China
国际会议
合肥
英文
2294-2300
2011-09-23（万方平台首次上网日期，不代表论文的发表时间）