Simulation method for air pressure fluctuation and human ear comfort

Abstract

The invention relates to a simulation method for air pressure fluctuation and human ear comfort. The simulation method mainly comprises the steps of: A, establishing a transfer function module of a human ear system through a ''gas-solid'' coupling module by taking air pressure out of the tympanic cavity as an input and air pressure inside the tympanic cavity and eardrum displacement as an output; B, inputting the air pressure Pi(s) out of the tympanic cavity which is a standard air pressure signal determined according to air pressure comfort standard in a high speed train into the transfer function module to obtain a corresponding standard eardrum displacement; and C, inputting the air pressure Pi(s) out of the tympanic cavity which is an air pressure signal in the train into the transfer function module to obtain a corresponding eardrum displacement; further obtaining a corresponding relationship curve of air pressure-eardrum displacement; and further obtaining the relationship between the human ear comfort and the eardrum displacement. The simulative analyzing result removes the individual difference of the human body, and a quantization standard of the human ear comfort degree can be put forward according to the human eardrum displacement so as to provide a more convenient, rapid, and objective ground for design and operating maintenance associated with the motor car of the high speed railway and the human ear comfort.

Description

technical field [0001] The invention relates to a simulation method of air pressure fluctuation and human ear comfort. Background technique [0002] my country's railways have undergone seven major speed increases and the opening of the Beijing-Tianjin, Wuhan-Guangzhou, Zhengxi, and Beijing-Shanghai expressways, and the railway has leapfrogged into the world's advanced high-speed railway ranks. In order to ensure the safe and comfortable operation of high-speed EMUs, it is necessary to study the influence of various physical quantities on human comfort. The comfort of traditional trains is mainly determined by vibration acceleration. When high-speed trains with a speed of more than 300km / h pass through tunnels and meet trains in tunnels, the impact of changes in air pressure outside the ear and the impact of transmission on human ear comfort has become a major problem: trains on the line When running at high speed, the air pressure on the surface of the car body will be aff...

AI Technical Summary

Problems solved by technology

The comfort of traditional trains is mainly determined by vibration acceleration. When high-speed trains with a speed of more than 300km / h pass through tunnels and meet trains in tunnels, the impact of changes in air pressure outside the ear and the impact of transmission on human ear comfort has become a major problem: trains on the line When running at high speed, the air pressure on the surface of the car body will be affected by factors such as the altitude, the speed change of the moving train, passing through tunnels, meeting cars and other factors. The leakage channel of the car body is transmitted to the outside of the ear, causing the air pressure outside the ear to fluctuate to a certain extent, resulting in a decrease in passenger comfort

Its disadvantages are: a lot of manpower and material resources invested, long time, low efficiency, the test results vary with the physical and psychological conditions of the volunteers, the repeatability is poor, and only preliminary air pressure comfort research results can be obtained.

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