研究目的:我国高速铁路常用的接触网铝合金腕臂系统优点是质量轻、施工方便,现场切割后不需要防 腐处理,但缺点也很明显,结构强度小、沿海地区耐氯离子腐蚀能力差。为了适应我国幅员辽阔,气候条件多样的特点,必须寻找适应多种气候特点的接触网腕臂系统。日式钢腕臂结构迥异于目前常见的腕臂类型,具有其特殊的优点。对它在国内接触网系统中的应用进行研究将对改进我国沿海及强风地区的接触网系统可 靠性有明显的促进作用。
研究结论:文章采用有限元方法并结合ANSYS软件编制了对日式钢腕臂结构的分析程序,结合标准规范和工程实际,对静力和模态分析的结果进行了研究。研究表明日式钢腕臂系统具备受力后挠度小、整体稳定性强、不易产生共振等优势’其静态强度校核也足以满足强度设计要求,具备良好的应用前景。
Research purposes: The aluminum alloy cantilever support structure are commonly used for the catenary system of the high-speed railway in China. It has many advantages,such as less weight,easy construction and needing no embalming after cutting, but its shortcomings are obvious, such as poor structure strength and poor resistance to chloride corrosion in coastal areas. As China is vast in territory and various in climate, in order to adapt to the various climate,it is necessary to seek the cantilever support structure of catenary system that can adapt to a variety of climatic characteristics. The Japanese steel cantilever support structure, much different from the common type cantilever, has its own advantages, so the research on its application in the catenary system in China has a notable effect on improving the reliability of the catenary system in Chinas coastal and strong wind regions.
Research conclusions: An analysis program was compiled for the Japanese steel cantilever structure with finite element method and ANSYS software. Combined with the standards and real project condition, the results of the static and modal analyses to the Japanese steel cantilever structure were studied. The result showed that the Japanese steel cantilever support structure had a lot of merits,such as the less deflection after loading and being uneasy to produce resonance due to the strong overall stability, and its static strength met the design requirements. So it has good applicable prospecting.