Study the Effect of the Foundation Surface on the Vibration Data at the Worker Arm Using Drilling Machine

Abstract

ABSTRACT

The hard workers are usually suffering from big medical problems after working with vibrating equipment such as compressor and different type of drills.These troubles give a big engorgement to study,measuring and analysis the vibration data resulting from the hard worker hand that is in touch with this vibrating equipment. This work studies the frequency and acceleration that will be measured at command,wrist, elbow, and shoulder in the human arm of hard works with different foundation boundary condition. The measuring of the vibration data in the human arm of hard workers is based namely on design and manufacturing a vibration measurement system according to international standard( ISO 28927-10) which consists of foundation structure, working structure ,drill,worker arm and vibration measuring system . The suggested vibration measurement system was used to measure vibration in the hard worker arm as a case study.The worker is of age, weight, length and arm length of 26 years, 85kg, 175cm and 80 cm respectively. The results shows that values of acceleration and frequency are increased with the decreasing the distance of sensor point from the drill handle. Also when using the concrete as ground foundation , the reduction in frequency at wrist, elbow, and shoulder in comparison with  comhand were.( 53.9%,72.5%,and 72.6%), (37.94%,10%,and 81.27.%), ( 55%,57.17%,and 57.7.%) for X,Y,and Z direction. While when using the Precast concrete as ground foundation , the reduction in frequency at wrist,elbow,and shoulder in comparison with  comhand were (67.9%,71.2%,and90.29%),(8.9%,16.5%,and74,39%),and(8.44%,13.18%,and20.74%)for ,Y,and Z direction.

Keywords: hand vibration, human vibration, acceleration, frequency, accelerometer.