Vibration fatigue of a vibration fatigue analysis is the modal analysis, that exposes the natural modes and frequencies of the vibrating structure and enables accurate prediction of the local stress responses for the given excitation. Only then, when the stress responses are known, can vibration fatigue be successfully characterized. The more classical approach of fatigue evaluation consists of cycle counting, using the rainflow algorithm and summation by means of the Palmgren-Miner linear damage hypothesis, that appropriately sums the damages of respective cycles. When the time history is not known, because the load is random ("e.g." a car on a rough road or
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