摘要
在小扰动条件下,提出应用偏导数法在复数域内求解可压缩气体润滑的动态Reynolds方程,以计算任意磁盘表面形状的磁盘-磁头气膜润滑的动态刚度和阻尼系数。以圆柱形和立方形比特图案化介质(BPM)磁盘为研究对象,研究了磁单元尺寸参数对气膜动态系数的影响,并比较了两种BPM对应的动态性能。数值结果表明,与光滑磁盘相比,图案化介质磁盘对应的气膜润滑动态刚度系数和阻尼系数大大减小,且随磁单元高度增大,动态系数逐渐减小。相比圆柱形BPM,立方形BPM对应的气膜具有较大动态刚度和阻尼系数,计算结果可为图案化介质磁盘的设计提供重要的理论依据。
With the assumption of small perturbation,this paper applied the partial derivative method to solve the compressible gas-lubricated dynamic Reynolds equation in the complex domain.This method might be used to calculate air-film dynamic stiffnesses and dampings of hard disk drives with arbitrary surface topography of disks.The dynamic stiffness and damping coefficients of air bearing over bit pattern media were calculated.Moreover,the effects of bit height of cylindrical and cuboidal bit pattern media on the dynamic coefficients were studied and also the dynamic performances of two types of bit pattern media were compared.The results indicate that the dynamic stiffness and damping coefficients of air bearing over bit pattern media largely decrease compared with those over smooth disk.With the increasing of bit height,the dynamic coefficients gradually reduce.Compared with cylindrical bit pattern media,the gas bearing over cuboidal bit pattern media has larger dynamic stiffnesses and dampings.These results may provide important theoretical reference for the designs of bit pattern media.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2017年第17期2036-2042,共7页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51575425)
