浮置板轨道上轮对相互影响系数的求解

Calculation method of wheelsets' interaction coefficient on floating slab track

为建立车辆-浮置板轨道的频域动力耦合模型,提出一种求解移动荷载状态激振下浮置板轨道结构上轮对相互影响系数的计算方法。该方法将对应于浮置板轨道上移动点的影响系数化为含有移动谐振荷载引起钢轨上定点频域响应的积分表达式,并以浮置板轨道的频域快速数值算法计算该定点频域响应。在此基础上,再通过数值积分方法计算影响系数的积分表达式,从而得到浮置板轨道上的轮对相互影响系数。通过该算法,对浮置板轨道上轮对相互影响系数进行探讨,得到其基本性质。算例表明:该方法能很好地反映浮置板轨道的结构特点和动力性能,可用于建立车辆-浮置板轨道的频域动力耦合模型,因而,具有较为重要的理论价值和应用价值。

In order to establish vehicle-floating slab track（FST） coupling model in the frequency domain, a calculation method of wheelsets＇ interaction coefficient on FST structure under moving excitation is proposed. With the method, the interaction coefficient corresponding to a moving point on FST is expressed to be an integration expression containing the response of a fixed point on rail in the frequency domain caused by a harmonic moving load, and the response of the fixed point on rail is solved through fast numerical algorithm in the frequency domain. Based on this, the integration expression of wheelsets＇ interaction coefficient can be calculated through numerical integral and the wheelsets＇ interaction coefficient can be finally obtained. Through the calculation method, the wheelsets＇ interaction coefficient on FST is discussed, and its basic characteristic is obtained. Calculation examples also show that the method can well reflect the structure characteristic and dynamic characteristic of FST, and can be well used in the vehicle-FST coupling model in the frequency domain. Thus, it has important theoretical and practical value.