摘要
采用有限差分法对一种新结构气浮垫的压力场进行了数值仿真分析。通过理论分析对气浮垫气膜压力分布和承载能力进行了研究,采用网格重叠和网格拼接技术划分网格,并对气体润滑状态控制方程和弹性薄板变形的控制方程进行了耦合计算,得到气浮垫的承载力和刚度。理论计算结果表明:在气体压力的作用下,环形弹性薄板产生弹性变形,引起节流面积和均压槽深度的变化,使得气浮垫的刚度较之传统已有气浮垫得到一定提高。新型气浮垫具有较广的应用推广空间。
By using the finite difference method,the press field of a new structure floatation cushion was simulated.Gas film pressure distribution and carrying capacity of the floatation cushion are studied through theoretical analysis.By utilizing overlapping stitching technique,the carrying capacity and stiffness were obtained by using the coupling procedure of the gas lubrication governing equation and elastic deformation of membrane governing equation.The results of theoretical calculations show that the effect of the gas pressure makes annular elastic membrane elastically deform,bringing about changes of throttling area and pressure groove depth of the floatation cushion.The carrying capacity and stiffness of the new styple floatation cushion are much better than the conventional flotation cushion.
出处
《机械科学与技术》
CSCD
北大核心
2011年第1期120-123,共4页
Mechanical Science and Technology for Aerospace Engineering
关键词
气浮垫
可变均压槽
刚度
floatation cushion
variable-section pressure equalizing groove
stiffness
