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FSI Research on the Noise Barrier of High-speed Railway in the Composite Conditions Hong Chao Wang1,a, Jin Fa Xie 2,b 1College of Vehicle and Power Engineering, Henan University of Science and Technology, Luoyang471003,China 2College of Vehicle and Power Engineering, Henan University of Science and Technology, Luoyang471003,China awhcjordan123@163.com bjfxie@mail.haust.edu.cn(Corresponding author) Keywords: FSI ; Workbench; Noise barrier; Train-induced impulsive wind pressure; Natural wind load; Abstract: Based on the model, it firstly gets the fluid distribution of noise barrier of high-speed railway, which is under the action of train-induced impulsive wind pressure and natural wind load, then transfers the computed result as exported load to the structural analysis module through the coupling interface, by proceeding the transient dynamic analysis and modal analysis, it finally obtains the equivalent stress, total deformation and modal distribution of noise barrier.
Fig.2 The Concrete Operation Procedure 2.2 Structural Analysis After the geometric model imported into Structural (ANSYS) Module, this part firstly need to define the material attribute with concrete called from the Material Dictionary for the subgrade, the flange of box, the straight wall and the barrier-body[6].
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Nsouli 2,g 1Physics Department, Faculty of Science, Beirut Arab University, Beirut, Lebanon, P.O.
Box 11-5020, Beirut, Lebanon & Physics Department, Faculty of Science, Alexandria University, Alexandria, EGYPT 2 Lebanese Atomic Energy Commission-CNRS P.O.
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Acknowledgement In this paper, the research was sponsored by National Natural Science Foundation of China(Project No.61307121), Launching Scientific Research Funds for Doctors (Project NO. 2012-B-04), and Aeronautical Science Foundation of China (Project No. 20122481002) .
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Define material properties and apply boundary conditions for a modal frequency analysis. 2) Select the element types.
In Ansys workbench, setting material, applying constraints and loads, meshing, etc, can be done friendly and easily.
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Acknowledgment This work is supported by important national specific projects of science and technology: High-Grade CNC Machine Tools and Basic Manufacturing Equipments (2009ZX04001-062).
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Mechanical properties of materials for tension sample are presented in Table 1.
Mechanical properties of a shear sample material are defined in Tab. 2.
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Additionally, the attenuation of electromagnetic wave and the non-homogeneity of sub-surface materials give rise to a reduction in quality of the radar image.
In all cases, water content ratio of sand for sub-surface material is 1.7%.
In the case of voids existed deeply under concrete slab, as shown in Fig. 3(b) and 9, it is necessary for contrast enhancement of the radar image, as pre-process, to apply the proposed method because reflections from the void are weakened by the attenuation effect, mainly from slab thickness, void depth and the change of electromagnetic properties within non-homogeneity materials.
Title of Publication (to be inserted by the publisher) In the case of detecting voids under concrete slab, it is necessary for contrast enhancement or noise filtration of radar image, as pre-process, to apply the proposed method because reflections from voids are weakened by the attenuation effect from void depth, thickness of slab and the change of electromagnetic properties within non-homogeneity materials.
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