物流车座椅减振器双向比对人-椅冲击动力学行为的影响

Effect of Seat Damper Bidirectional Ratio on Impact Dynamic Behaviors of Human-Seat for Logistic Vehicles

为探明减振器双向比对人-椅系统冲击动力学行为的影响规律,基于台架试验将座椅减振器阻尼特性简化为非对称分段线性函数,进而创建了人-椅非线性动力学模型及方程,并通过座椅台架试验验证了其有效性.以典型脉冲输入模拟座椅受到的垂向冲击,对不同强度脉冲激励工况、不同减振器双向比情况下的人-椅冲击动力学行为进行数值仿真.结果表明,当座椅减振器双向比大于1时,更有利于衰减驾驶室地板传递到驾乘人员的冲击;而且冲击输入强度越大,座椅减振器双向比大于1时的相对隔振效果越好.

To ascertain the damper bidirectional ratio effect on the impact dynamic behavior of the human-seat system,the most widely used X-type seat is taken as the research object.Based on the measured data by the damper bench,the damper damping characteristic of the seat is simplified as an asymmetric piecewise linear function.A nonlinear dynamic model for the human-seat was proposed and its equation was created and validated by seat test.Based on the model and the equation,taking a typical pulse with different intensity as inputs,numerical simulations were carried out under different bidirectional ratios.It is shown that when the seat damper bidirectional ratio is larger than 1,it becomes more conducive to attenuate the impact on drivers,and the greater the impact input intensity is,the better the relative isolation effect is.