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Engineering Study on Isolation of Propagation of Vibration Induced by High-speed Trains Using Honeycomb Barrier

Author: ZuoQiuHua
Tutor: ZuoXingCheng
School: Hunan University
Course: Engineering Mechanics
Keywords: High-speed train vibration Isolation barrier Honeycomb barrier Isolation effect Finite element method
CLC: TB535.1
Type: Master's thesis
Year: 2009
Downloads: 101
Quote: 2
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Abstract


In recent years, high-speed railway started in our country achieve rapid development . Foreign operations of high-speed railway that as the train speeds increase, high-speed train -induced vibration environment ( including land adjacent buildings vibration and vibration ) problem has become particularly prominent. Environmental vibration induced by high-speed train on the residents' daily life, work , and some sophisticated equipment production and use have a huge impact , and even endanger the safety of some of the ancient structure of the building . Isolation barriers typically used in construction (also called wave barrier ) to isolate vibrations or mitigate such hazards , currently a competitive barrier isolation barrier scheme is honeycomb . In this paper, to establish general finite element software ANSYS finite element model of the honeycomb barrier isolation , analysis of the effects of its isolation , vibration isolation for the project to provide a meaningful basis. The main contents include: ( 1 ) introduce the basic principles of vibration transmission , railway ground vibration caused by propagation characteristics of the basic principles of ground vibration isolation barrier as well as ground barrier isolator design criteria , active vibration isolation near-field and far-field passive vibration isolation and vibration isolation effect level representation . ( 2 ) The effects of vibration and wave finite element analysis of a number of basic questions , the finite element model size , cell size , time steps were discussed , elaborated dynamic boundary conditions OK. Finally, an example is given of the isolation system analysis FEA model size , cell size , time step and boundary conditions . ( 3 ) using the plane finite element method, finite element analysis software ANSYS to establish plane strain models were discussed in a row, two rows of honeycomb barrier in the original soil Wall, Hollow Wall, Wall tires under three kinds of filler material vibration isolation effect , draw some meaningful conclusions. ( 4 ) establish the roadbed , barriers, venue dimensional finite element model to analyze the effects of different vibration source location and isolation barriers at different depths pile barrier isolation effect , provide a theoretical basis for the engineering design , with great theoretical significance and application value.

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > Vibration and noise control and its use > Vibration isolation, damping materials and structures
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