水平振动下人-椅界面压力分布与振动特性研究

Study on Pressure Distribution and Vibration Characteristics of Human-Chair Interface under Horizontal Vibration

针对水平振动下坐姿人体舒适性问题,对其人-椅系统界面的动态压力分布与人-椅系统的振动特性的相关性进行研究,开展水平振动下坐姿人体舒适性研究。利用电动振动台产生正弦白噪声信号,Tekscan压力采集设备采集动态压力,采用ENS(靠背不支撑后背)与EBS(靠背支撑后背)两种坐姿,对汽车座椅进行水平振动实验,得到坐姿人体纵向压力分布图与坐姿人体响应传递函数曲线。通过计算平均压强、标准化平均压力与坐姿人体响应传递率,最终得出水平振动下坐姿人体背部动态压力对5Hz最为敏感,背部响应传递率在4Hz时达到峰值,7Hz时趋于平缓;臀部与大腿动态压力分别对3Hz与9Hz最为敏感;头部响应传递率在3Hz时达到峰值,6Hz时趋于平缓。为汽车座椅设计提供一定理论基础。

Aiming at the problem cf human comfort in,horizontal vibration sitting posture,the correlation between dynamic pressure distribution at the interface of the human-chair system and the vibration characteristics of the human-chair system was studied,and human comfort in horizontal vibration sitting posture was studied.The electric vibrating table is used to generate sinusoidal white noise signal,and the Tekscan pressure acquisition device is used to collect dynamic pressure.Two sitting positions,ENS(back without back support)and EBS(bacb with back support),are used to conduct horizontal vibration experiment on the car seat,and the longitudinal pressure distribution diagram of the sitting body and the curve of the response transfer Junction of the sitting body are obtained.By calculating the average pressure 9 the standardized average pressure and the response transmissibility of the sitting posture,it is concluded that the dynamic pressure of the sitting posture under horizontal vibration is the most sensitive to 5Hz,and the response transmissibility of the shoulder reaches its peak at 4Hz and flattens at 7Hz.Dynamic pressure of hip and thigh is the most sensitive to 3Hz and 9Hz respectively;The head response transmissibility peaked at 3Hz and leveled off cut 6Hz.To provide a certain theoretical basis for car seat design.