Influencing Factors of Adjustment Quantity of Vertical Track Profile Irregularity
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摘要: 为了探讨轨道高低不平顺(轨道高低)实际调整量与计算调整量的关系,提出了轨道高低调整量的计算方法;建立了钢轨-扣件-轨下垫板耦合计算模型;对轨下垫板垂向刚度、轨枕间距、松开扣件个数和调整枕个数等影响因素进行了分析.研究结果表明:调整枕只有1个时,轨下垫板垂向刚度对调整量的影响较大;轨枕间距和松开扣件个数对调整量的影响较小;连续多个轨枕调整且计算调整量相同时,中间部分调整枕的调整量可以达到计算调整量.Abstract: In order to probe into the relationship between practical adjustment quantity and calculated adjustment quantity of vertical track profile irregularity, a calculation method for adjustment quantity of vertical track profile irregularity was put forward, and a coupling calculation model of rail-fastener-rail-pad was established. The influencing factors, including vertical rail-pad stiffness, sleeper span and numbers of loosened fasteners and adjustment sleepers were analyzed. The research results show that vertical rail-pad stiffness has a large influence on the adjustment quantity when there is only one adjustment sleeper, while sleeper span and the number of loosen fasteners have a little influence on the adjustment quantity. Under the condition of continuous multiple adjustment sleepers with the same calculated adjustment quantity, the adjustment quantity of in-between sleepers can reach the calculated adjustment quantity.
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