This paper focuses on the bogie-carbody nonlinear dynamic interaction of a Shinkansen high-speed rail vehicle. The Euler-Bernoulli beam model is used to simulate vertical elastic vibrations of the carbody. As a novelty, the traction rod that connects the bogie frame and the carbody is considered a nonlinear element. The equivalent linearization method is used to analyze the nonlinear vehicle system in the frequency domain. The analytical spectrum solution was compared with the measured data from the running test and the numerical solution in the time domain. When the dynamic interaction due to the carbody’s flexibility is considered as nonlinear rather than linear, the maximum amplitude of the bounce acceleration relevant to the first bending mode increases by 38.2 percent at a travel speed of 300 km/h. Ride comfort improvement can be achieved with the inclusion of the nonlinear interaction. It is also feasible to manipulate the vehicle’s ride comfort by altering its bogie-base.

本文重点研究了新干线高铁车辆转向架与车身的非线性动力学相互作用。Euler-Bernoulli梁模型用于模拟车身的垂直弹性振动。作为一种新颖性，将转向架框架和车身连接在一起的牵引杆被视为非线性元件。等效线性化方法用于在频域中分析非线性车辆系统。将分析频谱解决方案与运行测试的测量数据和时域中的数值解进行了比较。当将由于车身灵活性引起的动态相互作用视为非线性而非线性时，与第一弯曲模式相关的反弹加速度的最大幅度在300 km / h的行驶速度下增加了38.2％。通过包含非线性相互作用，可以提高乘坐舒适性。通过改变转向架的底座来操纵车辆的乘坐舒适性也是可行的。