铁路桥梁箱梁外模结构分析及其动态性能研究

发布时间：2018-11-14 20:26

【摘要】：摘要：随着高速铁路的飞速发展,高速铁路箱梁得到了广泛的应用。作为高速铁路箱梁的主要制备设备,箱梁外模的强度、刚度以及动态性能是一项十分必要的研究课题。它涉及到高铁箱梁的施工效率和高铁箱梁的构件质量。因此,保证外模强度、刚度、精度及其在振动工作下的工作稳定性是外模设计的主要目标。本文正是围绕这一目标,以合蚌线32M箱梁外模为研究对象,研究其静力平衡及其动态响应。本文所做主要工作如下： (1)用SOLIDWORKS建立模板外模的三维模型,对其结构做了详细的介绍分析,并将适当部位进行简化,以方便计算。 (2)使用利用有限元分析软件ANSYS WORKBENCH对外模进行静态结构分析,得到外模最大变形与最大应力,分析危险位置状态。 (3)使用ANSYS WORKBENCH对外模进行自由模态以及约束模态分析,通过模态分析确定外模的固有频率和相应振型,得出外模可能出现共振的频率点,为谐响应分析结果提供参考。 (4)对外模进行不同附着式振动器布置间距下的谐响应分析,得出不同布置间距下模板腹板位置的应力响应与位移响应,对比分析结果得出2000mm是相对合理的布置方式。 (5)通过合蚌32M箱梁外模的实验,验证仿真模型及结果的可靠性和准确性。
[Abstract]:Abstract: with the rapid development of high-speed railway, box girder of high-speed railway has been widely used. As the main equipment of high speed railway box girder, the strength, stiffness and dynamic performance of external die of box girder is a very necessary research subject. It relates to the construction efficiency of high-speed box girder and the component quality of high-speed box girder. Therefore, to ensure the strength, stiffness, precision and stability of the external mode under vibration is the main objective of the design. In this paper, the static equilibrium and dynamic response of 32m box girder are studied. The main work of this paper is as follows: (1) the three-dimensional model of template external model is established by using SOLIDWORKS. The structure of the model is introduced and analyzed in detail, and the appropriate parts are simplified to facilitate the calculation. (2) using the finite element analysis software ANSYS WORKBENCH to analyze the static structure of the external die, the maximum deformation and the maximum stress of the external die are obtained, and the dangerous position state is analyzed. (3) the ANSYS WORKBENCH external mode is used to analyze the free mode and the constrained mode. The natural frequency and the corresponding mode shape of the external mode are determined by the modal analysis, and the frequency points of resonance are obtained, which provides a reference for the harmonic response analysis results. (4) the stress response and displacement response of template web are obtained by harmonic response analysis under different spacing of attached vibrator. The results show that 2000mm is a relatively reasonable arrangement. (5) the reliability and accuracy of the simulation model and the results are verified by the experiment of the outer model of the 32 m box girder of the clam.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.57

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