接触网参数对接触网风致响应的影响及风洞试验验证

大风作用会使接触网发生更大更复杂的振动与风偏,为给大风区接触网的防风设计提供科学依据,采用有限元计算与风洞试验相结合的方法进行研究。利用ANSYS软件建立包括支撑结构和悬挂部分的有限元耦合模型;采用谐波合成法(WAWS)模拟针对接触网结构特点的脉动风场;通过计算不同接触网参数组合方案在风荷载下的风致响应位移,定量分析得出悬挂类型、张力组合、跨距对接触网风致响应的影响。接触网气动弹性风洞试验结果表明,接触网参数对风致响应的影响的研究结果正确。研究成果应用于兰新铁路第二双线大风区接触网系统方案设计和技术参数选择,并作为主要理论支撑之一,形成了首个国内外铁路电化行业的风区接触网装备技术条件。

Influence of OCS Parameters on Wind-induced Response and Corresponding Wind Tunnel Tests

Strong wind may induce bigger and more complicated vibration and deviation of the overhead line system( OCS),thus the influence of OCS parameters on the wind-induced response is to be studied to provide a scientific basis for anti-wind design of OCS in strong wind areas. Therefore,this paper firstly uses the commercial software ANSYS to build up a finite element analysis model that includes the support structures and suspension parts. Secondly, the method of weighted amplitude wave superposition( WAWS) is used to simulate the fluctuating wind field based on specific characteristics of the OCS.Furthermore,the suspension type,tension combination and the influence of span on wind-induced response are determined by quantitative analyses and calculating the displacement caused by wind induced response of different combination OCS under wind load. Also,corresponding wind tunnel tests are conducted. The test results show that the finite element calculation results match the measurements of the wind tunnel tests in terms of the displacements due to wind-induced response. This study results are employed to design catenary system and technical parameters in Lanzhou-Urumqi High-Speed Railway and create the first catenary equipment technical conditions for strong wind areas in railway electrochemical industry world wide.