NATURAL FREQUENCY ANALYSIS OF TRACTOR OPERATOR'S BODY PARTS

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MALEKI ALI; MOHTASEBI SAYYED SAEID

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Information Journal Paper

Title

NATURAL FREQUENCY ANALYSIS OF TRACTOR OPERATOR'S BODY PARTS

Author(s)

MALEKI ALI | MOHTASEBI SAYYED SAEID | Issue Writer Certificate

Keywords

NATURAL FREQUENCYQ2

MUSCLEQ2

TRACTORQ2

ACCELERATIONQ2

MULTI DEGREE REGRESSIONQ2

Abstract

Introduction: One of the main properties of vibration systems is NATURAL FREQUENCY, which has a major influence on transmitted vibration. When an excited vehicle frequency was placed in the range of NATURAL FREQUENCY of operator's body parts, the ACCELERATION value on operator's body parts will be increased and led to damage the body parts. Meanwhile the use of vibration in optimum domain and frequency is caused to increase MUSCLE's dynamic power, reduce pain and chronic backache, and improve bone density and flexibility of MUSCLEs. This paper was aimed to calculate the NATURAL FREQUENCY of human body parts specifically in TRACTOR driver.Materials and methods: This research was carried out to calculate the NATURAL FREQUENCY of TRACTOR operator's body parts in vertical, lateral and longitudinal directions. Three operators with the weight of 55, 70 and 85 kg were participated. Tests were done at four excited vibration of 0.5, 1, 1.5 and 2 ms-2 in different frequencies and transmitted vibration to operator's body parts were measured. NATURAL FREQUENCY of different body parts in vertical, lateral and longitudinal directions were calculated. Also this NATURAL FREQUENCY was estimated by MULTI DEGREE REGRESSION method with operator's mass and excited frequency factors in each direction.Results: Results showed that the vibration value in longitudinal direction was increased about 3-4 Hz. In vertical direction two modes were appeared. First mode occurred in 13-17 Hz and second one in 9-11 Hz. Also in lateral direction, two modes in 14-17 Hz and 2.5-4.5 Hz were observed.Conclusion: Due to finding of this research, using the vibration in order to increase MUSCLE's functional parameters of different body parts should be done more than 20 Hz to avoid the damage to body parts. Also estimated of NATURAL FREQUENCY of different parts by driver mass and excited frequency factors has the best match to results of stationary experiments.

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APA: Copy

MALEKI, ALI, & MOHTASEBI, SAYYED SAEID. (2014). NATURAL FREQUENCY ANALYSIS OF TRACTOR OPERATOR'S BODY PARTS. JOURNAL OF RESEARCH IN REHABILITATION SCIENCES, 10(2), 250-268. SID. https://sid.ir/paper/143874/en

Vancouver: Copy

MALEKI ALI, MOHTASEBI SAYYED SAEID. NATURAL FREQUENCY ANALYSIS OF TRACTOR OPERATOR'S BODY PARTS. JOURNAL OF RESEARCH IN REHABILITATION SCIENCES[Internet]. 2014;10(2):250-268. Available from: https://sid.ir/paper/143874/en

IEEE: Copy

ALI MALEKI, and SAYYED SAEID MOHTASEBI, “NATURAL FREQUENCY ANALYSIS OF TRACTOR OPERATOR'S BODY PARTS,” JOURNAL OF RESEARCH IN REHABILITATION SCIENCES, vol. 10, no. 2, pp. 250–268, 2014, [Online]. Available: https://sid.ir/paper/143874/en

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