Vibration modal coordinates or modal participation factors. It may be clearer to understand if formula_72 is written as: Written in this form it can be seen that the vibration at each of the degrees of freedom is just a linear sum of the mode shapes. Furthermore, how much each mode "participates" in the final vibration is defined by q, its modal participation factor. An unrestrained multi-degree of freedom system experiences both rigid-body translation and/or rotation and vibration. The existence of a rigid-body mode results in a zero natural frequency. The corresponding mode shape is called the rigid-body mode. Vibration Vibration is
Control of Vibration at Work Regulations 2005 to identify which of their employees may be at risk from hand arm vibration disorders (HAV) or whole body vibration disorders (WBV) Hand arm v disorders can be caused by the use of hand-held power tools and can cause painful and disabling disorders of the blood vessels, nerves and joints. The risk of suffering from a disorder is increased dependent on the exposure to vibration and can vary widely between individuals. The symptoms, which affect the blood supply to the fingers, are also known as vibration-induced white finger. Whole body vibration is transmitted via the seat when sitting down in