Abstract:Shah function and Heaviside step function are used to describe the interval impact action of vibratory roller in time and space, and the load function is substituted into the dynamic control equation of elastic half space for simultaneous solution. The analytical solution in frequency-wavenumber domain is derived by using triple Fourier transform, and then obtained the solution in time-space domain by numerical inversion. Through numerical examples, the attenuation law and frequency spectrum characteristics of ground vibration caused by vibratory roller are studied, and the influence of vibration frequency, nominal amplitude and travel speed on foundation vibration characteristics is investigated. The results show that the influence of the vibration frequency of the roller on the amplitude of the foundation is very limited, but it has a great influence on the frequency distribution of the foundation vibration; on the contrary, the nominal amplitude of the roller has a great influence on the foundation amplitude. With the increase of the nominal amplitude, the foundation amplitude increases significantly, but the nominal amplitude has no effect on the vibration frequency of ground; as the speed of the road roller increases, the foundation amplitude first increases and then decreases, and the inflection point appears near 5 km/h; the greater the vibration frequency of the roller, the greater the increase of the foundation amplitude in the low-speed stage.
王立安,余云燕. 振动压路机作业引起地基振动的解析法研究[J]. 振动与冲击, 2022, 41(4): 48-54.
WANG Li’an,YU Yunyan. Analytic method research on vibration of ground caused by vibratory roller operation. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(4): 48-54.
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