Analysis of the combined effect of bad posture and vibration on helicopter pilots

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2002
Sezgin, Önder Cem
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One of the most important physical effects of the technological innovations, which we happily welcome, in our daily lives, is to be exposed to vibration. Vibration and bad posture affect, seriously various parts of the human body, especially the spine of the persons. In this thesis, emphasis is given to the effects of bad posture and vibration on musculo-skeletal system. In order to reach to the subjective assessments of the vibration exposed and vibration non-exposed groups of people, questionnaires were prepared. Analysis of these questionnaires has shown that, independent of profession and age, everybody has complaints relevant with his musculo-skeletal system. In order to find a correlation between the vibration levels and musculo-skeletal complaints of the person who have answered the questionnaires, vibrations were measured in all of the vibratory environments (e.g., suburban trains, intercity trains, automobiles, helicopter simulator and helicopter). Even though the measured vibrations do not exceed the exposure limits given by the international standards the complaints stated in the questionnaires necessitates the introduction of some preventive measures. The sensitivity analysis of the 3 and 4 DOF biodynamic models have shown that an increase in the viscosity of the lumbar cushions may serve as a good isolating interface between the seat and the person. The last part of the thesis, therefore, is devoted to the preparation of cushions filled with fluids of different viscosities. The prepared cushions were tested first in the laboratory mthen in the field. They are found to be satisfactory in reducing the low frequency vibrations.
Posture, Human beings, Human mechanics, Human physiology, Sitting position, Vibration (Aeronautics), Air pilots, Seated human body, Biodynamic model, Vibration transmission
https://hdl.handle.net/11511/12871
Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats
Ö. C. Sezgin, “Analysis of the combined effect of bad posture and vibration on helicopter pilots,” Ph.D. - Doctoral Program, Middle East Technical University, 2002.
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