Abstract:

In order to avoid the resonance of drum under external excitation during tire tests,first,the topological optimization analysis of 工-shaped drum was carried out,with the element density as the design variable,the volume reduction of 50% as the constraint and with the first-order natural frequency as the objective function. Next,the pseudo-density distribution of the drum was obtained,and the 工-shaped structure of drum was modified according
to the analysis results. Then,the structure size of the modified drum was optimized via 50 iterative calculations. Finally,on the premise that the first-order natural frequency was more than 60 Hz,the structure size of drum was taken as the optimum when the ratio of the first-order natural frequency to the total mass reached the maximum 0. 053 9. Optimization results show the total mass of the modified drum decreases by 69. 95kg and first-order natural frequency reaches 64. 384Hz,which is 21. 972Hz higher than that of the original drum.

Key words: tire test bed, drum, modal analysis, topology optimization