To reduce the structure vibration caused by changes of working directions, this study proposes a ball-screw inerter with two mechanical diodes, which divides the rotary motion of the flywheel used in the ball-screw inerter into two unidirectional rotations. And the dynamical model and equivalent electrical model of a ball-screw inerter with two mechanical diodes are established and analyzed. Moreover, considering dissipation of energy caused by mechanical diodes, there is a damper in parallel with the inerter. And the damping factor of the damper is in direct proportion to the angular frequency of the exciting harmonic force, when one terminal is fixed and the amplitude of the exciting harmonic force is almost constant. On account of the model and analysis, a ball-screw inerter with two flywheels and two mechanical diodes is designed, manufactured, assembled and installed on the experiment rig. By analyzing the experimental data gathered by force sensor, acceleration sensor and laser displacement sensor, the conclusions that the ball-screw inerter with two mechanical diodes is able to reduce the impulse caused by changes of working directions and there is variable damper caused by mechanical diodes in parallel with the inerter are proved.

为了减少由于工作方向的变化而引起的结构振动，本研究提出了一种带有两个机械二极管的滚珠丝杠惰轮，它将用于滚珠丝杠惰轮的飞轮的旋转运动分为两个单向旋转。建立并分析了带有两个机械二极管的滚珠惰轮的动力学模型和等效电气模型。此外，考虑到由机械二极管引起的能量耗散，有一个与惰轮并联的阻尼器。当一个端子固定且励磁谐波力的振幅几乎恒定时，阻尼器的阻尼系数与励磁谐波力的角频率成正比。根据模型和分析，设计，制造了带有两个飞轮和两个机械二极管的滚珠丝杠惰轮，组装并安装在实验台上。通过对力传感器，加速度传感器和激光位移传感器收集的实验数据进行分析，得出结论：带有两个机械二极管的滚珠丝杠惰轮能够减少工作方向变化引起的冲击，并且机械二极管具有可变的阻尼器。与惰轮平行被证明。