Effect Analysis on Vibration Isolation by Nonstandard Continuous Barriers

Abstract

Operation of Beijing-Tianjin express railway indicates that the era has been totally coming in China. By the end of last year, China's total mileages of high-speed railways opened to traffic are expected to top 8,400 km. and over 10,000 km high-speed railways are in progress. No country in the world has longer and faster express railway line than in the China. However, with the increase of the vehicle speed the environmental vibration along the railways has been increasingly severe. Therefore, the project on the vibration control is becoming a special concern in the civil and environmental engineering field. In this paper, the numerical method was used, and two numerical models were set up, which are composed of two parts, the vehicle-track-roadbed-ground coupling system and the ground-barrier-building coupling system. Dynamic load caused by high-speed railway were calculated in the first model and was loaded on the second model. The universal finite-element software ANSYS were used to analyze the reduction effect of vibration isolation by non-standard continuous barriers, which include trapezoid, anti-trapezoid, triangle, anti-triangle and so on, and compare the effect of the vibration isolation between standard barrier (as the rectangle) and non-standard continuous barriers. It is shown that the effect of non-standard barriers is better than traditional barrier, and the style of non-standard continuous barriers can be used to improve the effect of vibration isolation, which is a meaningful study.