Abstract
The monorail beam (Z206-25) of Chongqing straddle monorail transit system was selected as the research object. The spatial coupling vibration model of vehicle-bridge system was established and corresponding procedure was compiled. The effect of travelling, steering and stabilizing wheel pressure respectively and typical combined wheel pressure on the system vibration was studied. The results show that the change of wheel pressure has great effect on the response of the system. The vertical response value increases with travelling wheel pressure increasing. The lateral response value increases with steering wheel pressure increasing, while the effect of stabilizing wheel pressure on the response is irregular. The effect of steering wheel pressure is greater than that of stabilizing wheel pressure on lateral responses. The effect of all of travelling and steering wheel pressure is greater than that of unilateral wheel pressure on the response. The effect tendency of stabilizing wheel pressure on the response is opposite to that of unilateral wheel pressure.
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