• 제목/요약/키워드: Biomechanical analysis

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Biomechanical Analysis with the Force of Deltoid Muscle for Pianist

  • Shin, Dong-Ok;La, Seung-Houn
    • International Journal of Safety
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    • v.4 no.1
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    • pp.27-31
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    • 2005

  • This study presents the relationship between the height of the chair and the force of deltoid muscle for pianist. The subject simulated playing the piano on the three different heights of the chairs. Digital camera was used to determine the angle of the joint of shoulder and elbow for 2-dimensional static link segment modeling in the sagittal plane. The deltoid, biceps and triceps muscles were considered to determine the muscle load. The results, compared to the force of deltoid muscle, are that the downward position of the higher chair produces significantly large force than the other two lower chairs. It can be caused by hunched shoulder with decreasing deltoid angle. In case of the upward position caused by the lower chair, even though the smallest force of deltoid presented, it was increased the force of elbow.

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Modeling and Numerical Investigation of the Biomechanical Interaction for Human-Rifle System

  • Chae, Je-Wook;Lee, Young-Shin
    • Journal of Mechanical Science and Technology
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    • v.18 no.12
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    • pp.2069-2079
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    • 2004

  • This paper represents the description of a complex mathematical model of biomechanical interaction for human-rifle system during shooting. The model is developed by finite element method using bar elements. And three typical shooting positions, i.e. standing, kneeling and prone are used. Characteristics of interior/exterior ballistics and behaviors of human-rifle system are evaluated by this model, which takes into account the influence of environment, bullet, powder, barrel geometry parameters and anthropological parameters. The results of this study can be applied to anthropology, biomechanics, medical science, gait analysis, interior ballistics and exterior ballistics.

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Load Carrying Effect on the Biomechanical Parameters of Slips and Falls (미끄러져 넘어짐의 생체학적 연구에 있어서 부하이동이 끼치는 영향)

  • Myung, Ro-Hae
    • Journal of Korean Institute of Industrial Engineers
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    • v.27 no.2
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    • pp.197-202
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    • 2001

  • The biomechanical analysis of the load carrying effect on different floor surfaces has been conducted. Four different floor surfaces were prepared for ten subjects with each walking at a fixed velocity(1.33 m/sec) while carrying five different loads. The results showed that because of the significant interaction effect between floor slipperiness and the load carrying task, the load carrying effect should be analyzed according to different levels of the floor slipperiness, especially contaminant floors. On oily surfaces, slip distance(SD) and heel velocity (HV) increased whereas stride length(SL) decreased as load increased. In other words, significantly longer SD, faster HV, and no normal gait were found as load increased. As a result, a different protocol should be applied to measure floor slipperiness on oily floors as compared to dry surfaces for tribological approach.

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Analysis of Biomechanical Changes According to Mechanical Alignment of the Lower Limbs when Gait with a Material Handling (중량물 취급 보행 시 하지의 역학적 정렬에 따른 생체역학적 변화 분석)

  • Lee, Kyung-Ill;Lee, Chul-Gab;Song, Han-Soo;Hong, Wan-Ki
    • Korean Journal of Applied Biomechanics
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    • v.25 no.2
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    • pp.183-190
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    • 2015

  • Objective : Walking with a Material handling is an activity frequently undertaken by agricultural workers in Korea, due to the nature of their work. This study aimed to investigate differences in biomechanical variables according to the mechanical alignment of the lower limbs when walking with a heavy load, and to use this as basic data in the design of various working environments to reduce the skeletomuscular burden on the knee joint. Method : The study subjects comprised of 22 right-foot dominant adult men and women aged between 20 and 23 years. The subjects were divided into a varus or valgus group according to the mechanical alignment of the lower limb by using radiographic findings. The subjects walked without any load and with a load of 10%, 20%, or 30% of their body weight held in front of them. The Kwon3d XP program was used to calculate biomechanical variables. Results : The flexion/extension moment of the knee joint showed a decreasing trend with increased load, irrespective of the mechanical alignment of the lower limb, while the varus group did not show normal compensatory action when supported by one leg at the point of maximum vertical ground reaction force. In addition, in terms of the time taken, subjects showed no difficulties in one-foot support time up to 20%/BW, but at 30%/BW, despite individual differences, there was an increase in single limb. The increased load resulted in a decrease in the ratio of standing phase to ensure physical stability. The valgus group showed a trend of increasing the stability of their center of mass with increasing load, through higher braking power in the early standing phase. Conclusion : In conclusion, although there was no statistical difference in biomechanical variables according to the mechanical alignment of the lower limbs, the varus group showed a more irregular walking pattern with a Material handling than the valgus group, partially proving the association between lower limb alignment and walking with a Material handling.

  • https://doi.org/10.5103/KJSB.2015.25.2.183 인용 PDF KSCI