Abstract: The operation of China's high-speed railway crosses a very large latitude and longitude, and faces the opportunity to export high-speed railway equipment to countries with higher latitudes. The influence of low temperature on rolling noise needs systematic prediction and research. The assembly dynamic stiffness and loss factor of 300-1 fasteners and WJ-8 fasteners, which are widely used in China, are tested at different low temperatures. Based on the test results and the established slab track high-speed railway rolling noise prediction model, the rolling noise of high-speed railway at low temperature is studied. Studies have shown that as the environmental temperature decreases, the contribution of rolling noise to the equivalent continuous A-weighted sound level at the standard point will also decrease. Moreover, when the temperature reaches the glass transition temperature of the railpad materials, the decrease of temperature has little effect on the contribution value, and even makes the rolling noise increase slightly. For 300-1 fasteners and WJ-8 fasteners, compared with the rolling noise at 10℃, the maximum reduction of rolling noise contribution value can reach 4.0 dB(A) and 3.1 dB(A), when the train running at 350 km/h; This drop is mainly due to the change in the rail contribution. If the train runs at a lower speed, the total A-weighted sound level will be more sensitive to temperature. From the perspective of the one-third octave frequency band, at the frequency range below 2 000 Hz, it is necessary to consider the change of air parameters with temperature.

Key words: wheel/rail rolling noise, low environmental temperature, slab high speed railway