旋转激励环境下摩擦力测试实验装置设计与实验

Design and Experiments of a Experimental Device for Friction Force Test Under Rotary Excitation Condition

为了研究平面接触条件下摩擦力在旋转激励环境下的变化,设计了旋转激励环境下摩擦力测试实验装置,并进行了旋转激励载荷对钢-钢平面接触摩擦力的影响实验.该实验装置能够对激振力和激振频率进行精确调节,实现分别研究激振力和激振频率对平面接触摩擦力的影响.对钢-钢平面接触摩擦力的实验表明,相同激振频率下,随着激振力的增大,钢-钢平面接触摩擦力不断减小,且二者成近似线性变化趋势,当激振力达到39.9 N时,钢-钢平面接触摩擦力平均减小88.2%.相同激振力幅值下,随着激振频率的增大,摩擦力整体亦呈现减小的趋势,激振力越大,摩擦力减小越快,激振力幅值对钢-钢平面接触摩擦力影响较大,激振频率次之.

In order to investigate plane contact friction force variations under rotary excitation conditions, a friction test experimental device was designed and fabricated, and experiments of effects of rotary excitation loads on steelsteel plane friction force were conducted. The experimental device can regulate excitation force and excitation frequency precisely, then the effects of excitation force and excitation frequency can be researched separately. The experimental results show that under the same excitation frequency, the friction force decreases rapidly with the increase of excitation force, and exhibits a nearly linear relationship. When the excitation force reaches 39.9 N, friction force of steel-steel plane contact decreases by 88.2%. Friction force also shows a decreasing trend with excitation frequency increasing under the same excitation force, and the larger the excitation force is, the faster the friction force decreases. Thus, the excitation force has a stronger influence on steel-steel plane contact friction force, followed by excitation frequency.