便携式风力灭火机作业手传振动生物力学建模实验研究  

Biodynamic modeling and tests for operator arm’s hand-transmitted vibration during using portable pneumatic extinguisher

作　　者：马文凯[1] 李文彬[1] 文剑[1] 李伟林 MA Wenkai;LI Wenbin;WEN Jian;LI Weilin(School of Technology,Beijing Forestry University,Beijing 100083,China;Academic Affairs Office,Nankai University,Tianjin 300071,China)

机构地区：[1]北京林业大学工学院,北京100083 [2]南开大学教务处,天津300071

出　　处：《振动与冲击》2019年第19期38-44,共7页Journal of Vibration and Shock

基　　金：中央高校基本科研业务费专项资金项目(2017ZY27);教育部高等学校博士学科点专项基金项目(20120014110012)

摘　　要：为了能准确预测便携式风力灭火机振动给人体手臂带来的影响,降低人体手臂模型的复杂程度,结合便携式风力灭火机作业的实际情况,建立了五自由度手传振动生物力学模型,并考虑了肘部呈90°的弯曲臂姿势。根据手臂系统的生物动力学特征及在操作过程中人体手臂的动态平衡状态,进行力学分析建立系统机械等效模型,设计标准振动实验平台,辨识手臂模型参数,并将模型预测数据与便携式风力灭火机的实测数据进行了比较。结果表明:在肘部呈90°姿势、握力30 N、推力50 N状态下,模型响应与平均测量值比较显示了较好的一致性,能够较准确拟合手传振动响应特性曲线。该模型能较好地预测便携式风力灭火机作业给人体手臂带来的振动响应,可以为其风险评估提供量化的理论预测模型。Here,in order to correctly predict effects of portable pneumatic extinguisher vibration on operator arm and reduce operator arm model’s complex level,according to the actual operation condition of portable pneumatic extinguisher,a biodynamic model with 5-DOF for operator arm’s hand-transmitted vibration was built considering his elbow in a posture of a curved arm of 90°.According to biodynamic characteristics of the arm system and its dynamic balance state in operation process,mechanical analysis was conducted to establish the mechanical equivalent model of the arm system,and then the standard vibration test platform was designed to identify parameters of the arm model and compare the model’s predicted vibration data with the actual measured values of portable pneumatic extinguishers.The results showed that under conditions of operator elbow in a posture of 90°,gripping force of 30 N and thrust one of 50 N,vibration response of the model isbetter consistent to the average measured value,the model can correctly fit the response feature curve of arm’s hand-transmitted vibration;the model can be used to better predict operator’s arm vibration responses brought by operation of portable pneumatic extinguishers,and provide a quantitative theoretical prediction model for vibration risk evaluation.

关 键 词：便携式风力灭火机 手传振动 生物力学响应 人机工程学 

分 类 号：TB18[一般工业技术] S776.294[农业科学—森林工程]