为实验室铺设有砟、无砟两种梯式轨枕轨道,用自由落锤激励装置对两种梯轨减振性能进行对比研究。建立有砟梯轨、有砟普通轨道的数值模型,利用试验测试结果对模型进行验证。通过在模型中施加货运列车荷载对比两种有砟轨道减振性能。结果...为实验室铺设有砟、无砟两种梯式轨枕轨道,用自由落锤激励装置对两种梯轨减振性能进行对比研究。建立有砟梯轨、有砟普通轨道的数值模型,利用试验测试结果对模型进行验证。通过在模型中施加货运列车荷载对比两种有砟轨道减振性能。结果表明,有砟梯轨减振性能不及浮置式梯轨,在低频段有一定减振能力,20 Hz以下振动经道砟平均衰减25 d B,对控制重载货运列车环境振动具备潜在优势;梯式轨枕对分散列车冲击振动、降低时域内峰值有明显优势。展开更多
A system for measuring the quality parameters of elevator guide rails is developed. The quality parameters the system can measure include straightness, flatness, squareness, width and height of the rail. The system co...A system for measuring the quality parameters of elevator guide rails is developed. The quality parameters the system can measure include straightness, flatness, squareness, width and height of the rail. The system consists of six parts：main guideway, auxiliary guideway, reference rail, saddle, control casing and measured rail. The guide rail to be measured is mounted on a bed. The straightness errors of surfaces are checked by five linear displacement sensors mounted on the saddle. The deviation of readings from the sensor, which is in contact with top guiding surface, gives the straightness error of the surface and height of the rail. The other four sensors are used to measure side guiding surfaces respectively and give other parameters including flatness on the surfaces, squareness, width and height of the rail. A novel calibration method is also developed to calibrate the straightness motion error of the system in horizontal and vertical directions. The deflection deformation of the measured rail is fitted by using a fourth-order polynomial. Experimental results show that the uncertainty of the system on the side surfaces after compensating the straightness motion error is less than 0. 01 mm, and the uncertainty of the system on the top surface after compensating the straightness motion error and the deflection deformation of the rail is less than 0. 03 mm.展开更多
文摘为实验室铺设有砟、无砟两种梯式轨枕轨道,用自由落锤激励装置对两种梯轨减振性能进行对比研究。建立有砟梯轨、有砟普通轨道的数值模型,利用试验测试结果对模型进行验证。通过在模型中施加货运列车荷载对比两种有砟轨道减振性能。结果表明,有砟梯轨减振性能不及浮置式梯轨,在低频段有一定减振能力,20 Hz以下振动经道砟平均衰减25 d B,对控制重载货运列车环境振动具备潜在优势;梯式轨枕对分散列车冲击振动、降低时域内峰值有明显优势。
基金the United Technology Research Center( UTRC)Factory of Tianjin Elevator Rail in China
文摘A system for measuring the quality parameters of elevator guide rails is developed. The quality parameters the system can measure include straightness, flatness, squareness, width and height of the rail. The system consists of six parts：main guideway, auxiliary guideway, reference rail, saddle, control casing and measured rail. The guide rail to be measured is mounted on a bed. The straightness errors of surfaces are checked by five linear displacement sensors mounted on the saddle. The deviation of readings from the sensor, which is in contact with top guiding surface, gives the straightness error of the surface and height of the rail. The other four sensors are used to measure side guiding surfaces respectively and give other parameters including flatness on the surfaces, squareness, width and height of the rail. A novel calibration method is also developed to calibrate the straightness motion error of the system in horizontal and vertical directions. The deflection deformation of the measured rail is fitted by using a fourth-order polynomial. Experimental results show that the uncertainty of the system on the side surfaces after compensating the straightness motion error is less than 0. 01 mm, and the uncertainty of the system on the top surface after compensating the straightness motion error and the deflection deformation of the rail is less than 0. 03 mm.
