接头区轨面短波不平顺与P_1、P_2力关系的试验研究

Experimental Research on the Relationship between Short Wavelength Irregularity of Rail Surface on Jointer Areas and P_1、P_2

通过测试接头区轨面平顺性状态不同的两测点的轮轨力,研究分析轨面短波不平顺与高频瞬时冲击力P1、低频冲击力P2之间的关系.在对轨面不平顺数据进行小波分析和三分之一倍频分析得出不平顺差异的基础上,对两测点的P1、P2力进行对比分析.研究表明:轨面短波不平顺是引起轮轨力变化的主要原因;在轨面平顺性状态较好时P1、P2力大小相当,当轨面短波不平顺状态较差时P2明显大于P1;因此轨面短波不平顺状态的恶化主要对P2力产生明显影响,而对P1力影响则相对较小.

The relationships between rail surface irregularities and P1,transient high frequency impact force and P2,low frequency impact force are studied by means of measuring wheel-rail forces from two stations at different regularities of rail surface.On the base of irregularities differences between rail surface irregularities data through wavelet analysis and third-octave analysis,P1 and P2 are taken into comparative analysis.The study indicates that rail surface irregularities are the key reason to variations of wheel-rail force.The differences in values of P1 and P2 are not significant in good state of rail surface irregularities,but significant in bad state.Therefore,the rail surface irregularities will make a real difference on P2,but a little difference on P1.