Research and Application of Modal Test Method Based on Vibration of Vehicle

Article introduces theories of modal testing,methods of modal testing and correlative measures for guaranteeing test precision w hich should be follow ed in doing modal test based on vibration of vehicle,and states concisely the modal test of one heavy truck cab.By observing MAC map of the test,w e think that modal parameters w hich the test obtains are very believable,and by analyzing and researching of modal types,w e discover w eak connection of the heavy truck cab,w hich provides referenced basis for improving and optimizing of the heavy truck cab.