机械冲击下坐姿人体舒适性主客观评价  被引量:1

Subjective and objective evaluation of seated human discomfort caused by mechanical shocks

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作  者:罗巧 贺岩松[1] 邱茂昌 张志飞[1] 谭侃伦 LUO Qiao;HE Yansong;QIU Maochang;ZHANG Zhifei;TAN Kanlun(College of Mechanical and Vehicle Engineering,Chongqing University,Chongqing 400300;State Key Laboratory of Intelligent Vehicle Safety Technology,Chongqing 401133;Chongqing Changan Automobile Co.,Ltd,Chongqing 400023)

机构地区:[1]重庆大学机械与运载工程学院,重庆400300 [2]智能汽车安全技术全国重点实验室,重庆401133 [3]重庆长安汽车股份有限公司,重庆400023

出  处:《声学学报》2024年第2期238-245,共8页Acta Acustica

基  金:国家自然科学基金项目(51875060);智能汽车安全技术全国重点实验室开放基金项目(IVSTSKL-202301)资助。

摘  要:为减小主观随意性带来的偏差,引入最大化差异度量(MaxDiff)方法展开机械冲击下坐姿人体不适的主观评价试验,并结合加速度和惯性力客观指标对舒适性进行评价。构造了16个具有不同标称频率或位移幅值的冲击信号,基于MaxDiff方法得到12名受试者的主观评分。利用加速度传感器和测力板获取受试者的客观数据,提取其峰值、峰峰值、振动剂量值、最大瞬态振动值等客观评价指标,并采用相关性分析方法以及线性回归拟合进行主客观关联性分析。主观评价结果表明,随着机械冲击信号标称频率和位移幅值的增大,人体舒适性均变差。标称频率主客观数据之间具有较大相关性,客观指标(除振动剂量值外)的相关系数均在0.9左右。线性拟合回归结果表明,加速度和惯性力的峰值、峰峰值、最大瞬态振动值可作为表征冲击工况下坐姿人体舒适性的客观指标,而加速度比惯性力更适合用于表征舒适性。In order to reduce the deviation caused by subjective randomness,the maximum difference scaling(MaxDiff)method is introduced to carry out the subjective evaluation test of sitting human discomfort under mechanical impact,and the comfort is evaluated by objective indexes combining the acceleration and inertia force.Sixteen mechanical shocks with different nominal frequencies or displacement amplitudes were reconstructed.The subjective scores of 12 subjects under different mechanical impact signals were obtained using the MaxDiff method.The acceleration sensor and the force plate are used to obtain the objective data,so as to extract the peak value,peak to peak value,vibration dose value(VDV),maximum transient vibration value(MTVV)and other objective evaluation indexes.The correlation analysis and linear regression fitting are used to analyze the subjective and objective correlation.MaxDiff scores show that with the increase of nominal frequency and displacement amplitude of mechanical impact signal,human comfort becomes worse.Correlation analysis shows that there is a great correlation between subjective score and objective indexes.Except for the VDV,the correlation coefficients of objective indexes and subjective score are all around 0.9.The linear fitting regression results show that the peak value,peak to peak value and MTVV of acceleration and inertia force can be used as objective indexes to characterize the comfort of sitting human body under impact conditions,with the former being more suitable.

关 键 词:舒适性 机械冲击 坐姿人体 最大化差异度量 

分 类 号:U467[机械工程—车辆工程]

 

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