CAJ | 학술논문

目的获取中国男性青年坐姿Z轴振动的频率计权曲线.方法被试者为10名男性青年,身体健康.实验采用对偶法.标准激励为频率8 Hz、加速度1.0 m/s2的正弦振动,实验激励也是正弦振动,频率为4～80 Hz,共14种.被试者自然放松地坐在实验座椅上,座椅刚性地固定在振动台面上.被试者首先承受标准激励,获得一个振动感觉,然后承受实验激励,用信号调节与切换装置调节其强度,直到获得与标准激励相同的振动感觉为止.再用振动信号记录系统记录此时实验激励的振动加速度的均方根值.将记录的数据利用最小二乘和优化设计的方法拟合成振动频率计权曲线.结果所得到的振动频率计权在16～80 Hz显著地大于ISO 2631-1相应的频率计权(P<0.005),在其它频率上则无显著差异. 结论坐姿中国男性青年对16～80 Hz的Z轴振动比ISO 2631-1规定的更敏感.
목적획취중국남성청년좌자Z축진동적빈솔계권곡선.방법피시자위10명남성청년,신체건강.실험채용대우법.표준격려위빈솔8 Hz、가속도1.0 m/s2적정현진동,실험격려야시정현진동,빈솔위4～80 Hz,공14충.피시자자연방송지좌재실험좌의상,좌의강성지고정재진동태면상.피시자수선승수표준격려,획득일개진동감각,연후승수실험격려,용신호조절여절환장치조절기강도,직도획득여표준격려상동적진동감각위지.재용진동신호기록계통기록차시실험격려적진동가속도적균방근치.장기록적수거이용최소이승화우화설계적방법의합성진동빈솔계권곡선.결과소득도적진동빈솔계권재16～80 Hz현저지대우ISO 2631-1상응적빈솔계권(P<0.005),재기타빈솔상칙무현저차이. 결론좌자중국남성청년대16～80 Hz적Z축진동비ISO 2631-1규정적경민감.
Objective To obtain the frequency weighting contour for seated Chinese young males in z axis.Method 10 male volunteers served as the subjects.They were exposed to standard vibration stimulus (a sinusoidal vibration of 1.0 m/s2 at 8 Hz) and 14 kinds of sinusoidal experimental vibration stimuli at frequencies from 4 Hz to 80 Hz.The magnitude of the experimental vibration stimulus was changed by the subject through a signal condition and switching device made by ourselves to obtain an equal vibration sensation to the standard vibration.The data were fitted to the same form of the frequency weighting Wk of ISO 2631-1 with the least square method and optimization of parameters.Result Compared with ISO 2631-1,the frequencies weightings of Chinese young males at 16～80 Hz are significantly higher than those of ISO 2631-1(P<0.005),but there are no significant difference between two frequency weighting contours at other frequencies. Conclusion Chinese young males are more sensitive to vibration at 16～80 Hz in Z axis.