This paper describes an experimental study on the use of Ritz vectors for damage detection of a grid-type bridge model. A new procedure to extract Ritz vectors from experimental modal analysis is proposed and demonstrated using the test structure. Using appropriate load patterns, Ritz vectors can be made more sensitive to damage than modal vectors. The results indicate that the use of load-depe...

In this study, both theoretical linear model and numerical model are used to predict and optimize the frequencies of shimmy related modes and the level of the vibration for a vehicle. A theoretical multi-body linear model of 32-DOF were used for quasi-static analysis and modal analysis. The theoretical model was verified by comparing the results of modal analysis with those of modal test for fr...

Baddeley’s (1986) working memory model suggests that imagery spatial information and verbal information can be concurrently held in different subsystems within human working memory. Based on this model and research on human attention, a new dual-modal presentation depicting the hierarchical relationships in texts as a tree structure and delivering remaining texts as voice messages is proposed. ...