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理解坐姿人体的振动特性对于评价、改进各类运载工具的乘坐舒适性具有重要的意义.迄今针对坐姿中国人体振动特性的公开文献极少.采用宽带随机白噪声信号与自制座椅传感器,对28名志愿者进行了多种激励水平下的坐姿垂向振动测试,得到了1～20Hz范围内的视在质量数据.选择包含框架质量的并联两自由度生物动力学模型描述坐姿人体垂向振动特性,依据视在质量的实频与虚频信息定义误差函数,采用Gauss-Newton法获得了各志愿者的全部模型参数.通过对实测数据作质量归一化与平均处理,给出了20～25岁年龄段标准中国人体坐姿垂向振动特性的模型参数与模态参数.模型给出的视在质量与实验数据高度吻合.应用统计分析讨论了身高、体重对坐姿人体参数的影响.
It is of great significance to understand the vibration characteristics of sitting human body for evaluating and improving the ride comfort of all kinds of vehicles.For the moment, there are few published literatures about human body vibration characteristics in sitting posture.Using wideband random white noise signals and self-made seat sensors, The volunteers carried out the vertical vibration tests of sitting posture under various stimuli levels and obtained the apparent mass data in the range of 1 ~ 20 Hz.The parallel two-degree-of-freedom biokinetic model including frame quality was used to describe the vertical vibration characteristics of sitting human body , The error function was defined according to the real and imaginary frequency information of apparent quality, and all the model parameters of each volunteer were obtained by Gauss-Newton method.Through the normalization and averaging of the measured data, The model parameters and modal parameters of vertical body vibration characteristics of Chinese people in the age group of the standard age are given.The model shows that the apparent mass is in good agreement with the experimental data.The effects of height and weight on sitting human body parameters are discussed by statistical analysis.