硬盘中填充氦气可以有效改善磁盘的存储性能，提高硬盘存储密度和降低功耗． 氦 － 空混合气体中氦气的含量将会影响磁头气浮力与磁盘表面剪切力，导致磁头磁盘表 面润滑剂发生迁移． 本研究利用有限单元法求解修正雷诺方程，计算不同氦 － 空混合比例 条件下的磁头气浮力和磁盘表面剪切力，分析磁头飞行姿态、磁盘转速以及环境温度对磁 头磁盘界面力学特性的影响． 研究结果表明: 氦 － 空混合条件下飞行高度的增大将导致磁 头气浮力和磁盘表面剪切力减小; 磁头气浮力和磁盘表面剪切力随着磁盘转速的增加和 环境温度的升高而增加; 俯仰角和翻转角的增大将会引起飞行高度降低而增大磁头气浮 力，然而俯仰角和翻转角对磁盘表面剪切力的影响可忽略不计．

Helium can improve storage density and reduce power consumption of hard disk drives． In air-helium gas mixtures，the percentage of helium will affect the air bearing force of a slider and the air shearing force of a disk surface，which leads to lubricant transfer at the head /disk interface． In this research，the finite element method was used to solve the modified Ｒeynolds equation． The air bearing force of the slider and the air shearing force of the disk surface in air-helium gas mixture were calculated． The effect of flying gesture，disk velocity，and environmental temperature on the mechanical properties of the slider and the disk were investigated． The results show that，in air-helium gas mixtures，the air bearing force of the slider and the air shearing force of the disk surface decrease with an increase in flying height． The air bearing force and the shearing force increase with an increase in disk velocity and temperature． With an increase in pitch angle and roll angle，the flying height decreases，which leads to an increase in the air bearing force． However，the effect of the pitch angle and the roll angle on the air shearing force of the disk surface in air-helium gas mixtures is negligible．