This standard specifies the general method for measuring and reporting vibration transmitted by the human hand. This standard does not specify the safe vibration limit. This standard applies to periodic, random or non-periodic vibration. It can also be temporarily applied to repetitive impact vibration. GB/T 14790-1993 Measurement and evaluation method of vibration transmitted by the human hand GB/T14790-1993 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Methods for the measurement and the assessmentof human exposure to hand-transmitted vibrationGB/T14790—93
This standard is equivalent to the international standard ISO53491986 "Mechanical vibration-Guide for the measurement and assessment of human exposure to hand-transmitted vibration". 1 Subject content and scope of application
This standard specifies the general method for measuring and reporting human hand-transmitted vibration, that is, the hand-transmitted vibration is measured in 1/3 octave bands with a center frequency of 6.3 to 1250 Hz and an octave band with a center frequency of 8 to 1000 Hz on three orthogonal axes, and the frequency-weighted measurement covers a frequency of 5.6 to 1400 Hz. Www.bzxZ.net
This standard only gives the method for evaluating hand-transmitted vibration according to frequency-weighted acceleration and daily exposure time, and does not specify the safe exposure limit. This standard is applicable to periodic, random or non-periodic vibration. It can also be temporarily applicable to repetitive impact vibration. 2 Reference standards
GB/T2298 Mechanical vibration and shock terminology
GB3241 1/1 and 1/3 octave filters for sound and vibration analysis GB10084 Analysis and representation of vibration and shock data 3 Terminology
3.1 Hand-arm system
The upper limb of a person as a vibration and shock receiver. 3.2 Hand-transmitted vibration Mechanical vibration directly applied to or transmitted to the hand-arm system through the hand or fingers. 3.3 Basic center coordinate system Basicentric coordinate system A right-handed rectangular coordinate system with its origin set at a point on the contact surface through which the mechanical vibration or shock is transmitted to the human body or a point related to it. 3.4 Biodynamic coordinate system Biodynamic coordinate system A right-handed rectangular coordinate system used in biodynamics, with its origin set at a point in the human body determined by anatomy. 3.5 Frequency-weighted acceleration frequency-weighted acceleration is the acceleration weighted according to the human body's sensory response to vibrations of different frequencies and the physiological effects produced, referred to as weighted acceleration.
Energy-equivalent frequency-weighted acceleration3.6 Equi-energy frequency-weighted acceleration
The energy average of the frequency-weighted acceleration within a certain specified time is called the equi-energy frequency-weighted acceleration within that time, referred to as equi-energy weighted acceleration.
4 Characteristics of hand-transmitted vibration
4.1 Influencing factors
Under working conditions, the severity of the biological effects of hand-transmitted vibration is affected by the following factors: Approved by the State Bureau of Technical Supervision on December 28, 1993 and implemented on October 1, 1994
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