According to the innovative techniques and their limitations of ICE3 bogie original design,the stability robustness of high-speed train system integration should be emphasized more in the present practice of high-speed rails,especially to keep from the side-wind instability problems and their harmful influences.Considering the highorder modal truncation and the negative effects of their residual forces to the rigid-flex coupling simulations of highspeed rolling stock,the novel concept of singularity co-effi...