High-speed train in the lab: ZJU research among top 10 scientific advances of China

2018-01-03

Hish-speed train simulation facility at Zhejiang University


The Commission for Science and Technology of the Chinese Ministry of Education announced the Top 10 Scientific Advances of 2017 in China’s Universities on December 26, 2017.

The project “Model Testing of the Dynamic Behaviors of High-speed Trains”, conducted by a research team led by Professor CHEN Yunmin and Professor BIAN Xuecheng with ZJU’s College of Civil Engineering and Architecture, has won this highly-acclaimed title.

The team has pioneered the invention of a testing device for the dynamic behaviors of high-speed trains all over the globe. Their device can measure track vibration and soil response of a ballastless high-speed railway from a full-scale model testing with simulated train moving loads at various speeds.

Since 2011, ZJU has had five research projects selected for the annual list, including “Theories and Approaches in Hybrid Intelligence Based on Brain-Computer Integration” led by ZJU President Professor Wu Zhaohui and “The Layered System of New Molecules in Liver Transplant for Liver Cancer Patients” led by Professor ZHENG Shusen.

Project Overview

The velocity of a high-speed train approximates or surpasses the wave speed of subgrade soil. The vibration induced by a train may lead to shock waves and the Mach effect, thereby adversely affecting its safety and comfort. Model testing in the laboratory, as an effective alternative to a field measurement, is of immense scientific and engineering significance.

The ZJU research team pioneers the invention of a testing device for the dynamic behaviors of high-speed trains all over the globe. This device measures track vibration and soil response of a ballastless high-speed railway from a full-scale model testing with simulated train moving loads at various speeds. A computer-controlled sequential loading system is developed to generate equivalent vertical loadings at the track structure for simulating the dynamic excitations due to the train’s movements. The proposed model testing can precisely reproduce dynamic behaviors of the track structure and underlying soils under train moving loads. The attenuation characteristics of dynamic soil stresses in a ballastless slab track are found to differ distinctly from those in a ballasted track. The model testing results provide better understanding of the influence of dynamic soil-structure interaction and train speed on the response of track structure and soils.

People


BIAN Xuecheng

Professor

College of Civil Engineering and Architecture



CHEN Yunmin

Professor

College of Civil Engineering and Architecture