Effect of load carriage on the backpack vibration system

Vibration causes many problems in human health, comfort and performance. While walking with a backpack, movement of the backpack relative to the body causes a vibration which behaves like a spring that moves up and down following the motion of the body. In order to analyse the backpack's respon...

Full description

Saved in:
Bibliographic Details
Main Authors: Abdul Rahman, Sharifah Alwiah, Rambely, Azmin Sham, Ahmad, Rokiah Rozita
Other Authors: Abdullah, Shahrum
Format: Book Section
Published: Trans Tech Publications 2012
Subjects:
Online Access:http://eprints.utm.my/id/eprint/35690/
http://dx.doi.org/10.4028/www.scientific.net/AMM.165.295
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Universiti Teknologi Malaysia
Description
Summary:Vibration causes many problems in human health, comfort and performance. While walking with a backpack, movement of the backpack relative to the body causes a vibration which behaves like a spring that moves up and down following the motion of the body. In order to analyse the backpack's response to trunk motion, a backpack vibration system has been developed in this study. A model of a backpack-human trunk system, which is represented by a mass-spring system with a damper, and a Fourier series as an external force, is used to describe the motion of the vibration system. The vibration system was analysed using constant values of damping and spring stiffness (c =1 and k = 5) but with different values of the mass of the backpack. Increasing the mass of the backpack from 10% of body weight to 15 and 20% of body weight increased the amplitude of both the displacement and velocity of the backpack vibration system. However, the frequencies of the vibration system decreased as the mass of the backpack increased.