This standard specifies the mechanical transmissibility of the human body in the z-axis direction in the sitting and standing positions. This standard applies to the mechanical transmissibility of the human body in the sitting and standing positions under the action of whole-body vibration in the z-axis direction within the frequency range of 0.5 to 31.5 Hz, and can be used as a basis for designing man-machine systems and devices, evaluating their mechanical properties, and taking vibration control measures. This standard does not apply to the mechanical transmissibility of the human body in the x-axis and y-axis directions in the sitting and three-dimensional positions. GB/T 16441-1996 Mechanical transmissibility of the human body in the z-axis direction for vibration and shock GB/T16441-1996 Standard download decompression password: www.bzxz.net
This standard specifies the mechanical transmissibility of the human body in the z-axis direction in the sitting and standing positions. This standard applies to the mechanical transmissibility of the human body in the sitting and standing positions under the action of whole-body vibration in the z-axis direction within the frequency range of 0.5 to 31.5 Hz, and can be used as a basis for designing man-machine systems and devices, evaluating their mechanical properties, and taking vibration control measures. This standard does not apply to the mechanical transmissibility of the human body in the x-axis and y-axis directions in the sitting and three-dimensional positions.

GB/T16441-1996
This standard adopts the international standard ISO7962:1987 "Mechanical vibration and shock - Axial mechanical transmissibility of the human body".
This standard specifies the axial mechanical transmissibility of the human body in sitting and standing positions. When considering the effects of mechanical vibration and shock on the human body, it is necessary to understand the dynamic characteristics of the human body. The human body mechanical transmissibility is an important parameter to describe the biodynamic response of the human body and an effective method to evaluate the dynamic characteristics of the human body. Due to the differences in the structural characteristics of the human body between Chinese and foreigners, there are differences in the biodynamic response of the human body. Therefore, the international standard cannot be adopted as equivalent or equivalent. The principles for the preparation of this standard are: (1) The principle of suitability to national conditions: the main technical content is based on the results of human experimental research on Chinese people. (2) The principle of internationality: the standard framework, writing method and certain technical contents are as close to international standards as possible, and combined with the specific reality of my country, the international standard is "non-equivalently adopted".
When applying this standard, it is necessary to pay attention to its use restrictions and the factors that may change the human body transmissibility. This standard is proposed and managed by the National Technical Committee for Mechanical Vibration and Shock Standardization. The drafting unit of this standard is the Institute of Aerospace Medicine and Engineering. The main drafter of this standard is Liu Jianzhong.
1 Scope
National Standard of the People's Republic of China
Mechanical transmissibility of the human body in the z direction
Vibration and shock
Vibration and shock-Mechanical transmissibility of the human body in the z direction This standard specifies the mechanical transmissibility of the human body in the axial direction in the sitting and standing positions. GB/T 164411996
neqIs07962:1987
Applicability of this standard Under the action of axial whole-body vibration in the frequency range of 0.5 to 31.5 Hz, the mechanical transmissibility of the human body in the sitting and standing positions can be used as the basis for designing man-machine systems and devices, evaluating their mechanical properties and taking vibration control measures. This standard does not apply to the mechanical transmissibility of the human body in the axial and y directions in the sitting and standing positions. 2 Referenced standards
The clauses contained in the following standards constitute the clauses of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2298--91 Mechanical vibration and shock terminology GB/T13441---92 Measurement specification of human whole body vibration environment GB/T15619-1995 Human mechanical vibration and shock terminology 3 Definitions
This standard adopts the following definitions.
3.1 Mechanical transmissibility The dimension of the response amplitude and the excitation amplitude of a linear system to a given frequency during steady-state forced vibration is: The complex ratio of the response and excitation amplitude. The response and excitation can be any of the same physical quantities in force, displacement, velocity or acceleration. For non-harmonic vibration, the mechanical transmissibility can be calculated from the displacement, velocity or acceleration spectrum.
3.2 Human transmissibility Human transmissibility is expressed as the modulus of the mechanical transmissibility. It describes the transmission of whole-body vibration from the excitation site to a specified response site of the human body. 3-3 Transmissibility modulus The ratio of the modulus of motion.
3.4 ​​Phase of transmissibility The phase difference between the output motion and the input motion. 3.5 Whole-body vibration Whole-hodyvibration Mechanical vibration transmitted to the entire body, usually through the area where the body contacts the support surface (which is vibrated) (such as the buttocks, the bottom of the feet and the back in the supine position, etc.) (see 4.5 in GB/T156191995). 3.6 Linear system linear system
A system whose response is proportional to the magnitude of the excitation and satisfies the superposition principle (see 2.20 in GB/T229891) Approved by the State Administration of Technical Supervision on June 17, 1996 and implemented on December 1, 1996
4 Influencing factors
The main factors affecting the human body transmissibility are: GB/T 16441--- 1996
a) the direction of vibration action (see 4.2 in GB/T13441-92), human posture and muscle tension b) the degree of mechanical coupling between the vibration excitation and the human body; c) the characteristics of the human body restraint system.
5 Usage restrictions
5.1 Frequency range
The applicable frequency range of human body transmissibility is 0.5～31.5Hz5.2 Linearity
When the human body is subjected to axial vibration, it generally exhibits nonlinear characteristics. Under normal gravity conditions, if the vibration acceleration during the measurement of human body transmissibility is not greater than 4m·s-2 (rms), the nonlinear characteristics can be ignored and the human body can be approximately regarded as a linear system. 5.3 Body posture
The transmissibility is affected by body posture and muscle tension. When the body is straight or the muscles are tense, the transmissibility of higher frequencies increases. The applicable postures of this standard are: the body posture of the sitting position is natural sitting, and the body posture of the standing position is natural upright. 5.4 Measurement point bZxz.net
The excitation measurement point is located at the buttocks of the sitting person or the soles of the feet of the standing person, and the response measurement point is located at the center of the top of the human head. When axial vibration is excited, the movement of the human head can have two components: vertical and horizontal movement. The human body transmissibility only considers the vertical movement component of the head. 5.5 Seats and safety belts
The external contact interfaces of the human body, such as clothing, seats (including backrests, armrests, footrests and seat cushions) and safety belts, will affect the transmissibility of the human body. The conditions of this standard are no backrest, no armrest, no footrest, no seat cushion and no safety belt. 6 Frequency characteristics of human body transmissibility
When the human body is subjected to axial excitation in a sitting or standing position, the human body transmissibility has the following general characteristics: less than about 2.0Hz. The human body can be regarded as a rigid body, and its transmissibility is about 1.0; above this frequency, the transmissibility rises to the maximum near 5.0Hz, which is the main resonance area of ​​the human body, and its transmissibility is about 1.69 times (sitting position) and 1.54 times (standing position) of the rigid body vibration transmissibility under the same experimental conditions; the transmissibility decreases from 5.0 to 7.0Hz; above 7.0Hz, the transmissibility is less than 1.0.
The frequency characteristics of the two postures above 8.0Hz are different: for the sitting position, an inconspicuous second peak appears between 8.0 and 12.0Hz, and the transmissibility decreases significantly at 20.0Hz; for the standing position, an obvious second resonance response appears between 18.0~~30.0Hz, and the transmissibility gradually decreases above 30.0Hz.
The human body transmission rate of the sitting and standing human body in the range of 0.5～31.5Hz is shown in Figures 1 and 2 respectively. 692
GB/T 16441—1996
2025 31.540
Frequency/Hz
—120
—200
—240
50.530.81.01.251.6
Frequency/Hz
Figure 1 Mechanical transmission rate of sitting human body
(Based on the average curve fitting of the acceleration transmission characteristics measured by 60 subjects) 693
—190
GB/T164411996
0.81.1. 25..62.0
53.154.。 5.06.38.0
Frequency/Hz
2531.5.40
0.50.630.81.01.251.62.02.53.154.05.06.38.01012.516 20Frequency/Hz
Figure 2 Mechanical transfer rate of standing human body
(fitted based on the average curve of acceleration transfer characteristics measured by 50 subjects)
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