【作者】 杜以昌；

【导师】 张仲鹏； 赖涤泉；

【作者基本信息】 西南交通大学 ， 机械设计与理论， 2002， 硕士

【摘要】 臂式掘进机是一种集开挖、装碴和自动行走于一体的部分断面隧道掘进机，它非常适用于软岩隧道的掘进。如果以臂式掘进机为中心，结合其它配套设备，就可以形成一套新的铁路软岩隧道机械化施工模式。本文作为铁道部科技发展计划项目“软岩隧道悬臂掘进机施工技术与应用”的一部分，较系统地研究了JSBZ132型铁路软岩隧道臂式掘进机的主机架，主要内容包括： (1)针对铁路软岩隧道的特点和施工方法，根据JSBZ132型掘进机的总体设计，对掘进机各机构的布置及其与主机架的连接进行分析，设计主机架的总体结构。 (2)通过对掘进机工作原理和作业过程分析，研究在截割作业时截割头的受力情况，为确定工作机构受力提供依据。 (3)对研究设计的JSBZ132型臂式掘进机工作机构的工作特性进行分析。 (4)模拟六种危险工况下的截割头受力，并将其转化到主机架，推导出主机架在这些工况下的受力计算公式。 (5)利用ANSYS软件对主机架进行建模，根据实际情况对各种工况施加荷载和约束条件，利用该软件的后处理程序，分析主机架上各点在各工况下的应力与变形，找出最危险点，从而对主机架结构进行改进。 (6)采用集中质量法建立简化模型，利用ANSYS软件对主机架进行动力模态分析。求出其5阶固有频率和振型，将固有频率与振源频率比较，并对各阶振型进行动态观察与分析，得出了其在正常工作时不会发生共振的结论。 主机架是臂式掘进机的关键部件，本文通过理论分析和有限元工程计算对其主要力学特性进行研究，获得了有实用价值的成果，为铁路软岩隧道臂式掘进机总体结构特别是主机架的设计和制造提供了理论依据和设计计算方法。更多还原

【Abstract】 Roadheader is a part profile tunnel boring machine which can excavate,convey rock blocks and walk by itself. It is very suitable to excavate soft-rock tunnel. Centered with roadheader and equiped with other equipments,a construction mode of railway soft-rock tunnel may be set up. As a part of scientific research project of "Construction Technique and Application of Railway Soft-rock Tunnel Roadheader",the main frame of the roadheader was systematically researched in the dissertation. The following are the main contents:(l)Be seasoned with the construction technique and specialties of railway soft-rock tunnel,the general project of JSBZ132 roadheader is put forward. The main fram is designed. Every mechanism’ s location and how to joint them are analysised.(2) By analysis of the working principium and process of the roadheader,the cutter’ s driving forces are investigation.(3) The working characteristics of the working mechanism are analysised.(4) By imitation of six typical construction cases of the roadheader,the main frame’ s driving forces are analysised. The calculating formulaes of the forces are reached.(5)The finite element analysis software(ANSYS) is applied to the analysis of the main frame. Six typical construction cases of the roadheader are imitated . The finite elements model are set up. The restrictions and loads are applied to the model of the main frame. The stress and deformation of each node are reached. The most danger place is discovered. The advices to improve the components structure are given on the basis of deform and stress distribution.(6)The modal analysis of the main frame is carried out.The method of centralized mass is made use of. The preceding five steps modal frequencies and the corresponding vibration modals of the main frame are calculated.By means of the comparison basic frequency with the other vilration sources and the analysis of each other step vibration modes,the structure is proved to be safeThis dissertation studied the important mechanism of theroadheader. The useful results are obtained through studying mechanical analysis for the main frame. The analysis include finite element analysis and engineering calculation . A series of theoretic criterions and calculate method to the detailed design of the main frame are given by finite element analysis.更多还原