双承载索多跨索道鞍座两端拉力模型与验证OA

[Objective]This study aims to address the problem of insufficient accuracy in traditional calculation methods for analyzing the tension of the carrying cables at both ends of horizontal-curved saddles in double-carrying-cable multi-span ropeways,and to provide a reliable theoretical basis and technical support for the design and safety assessment of such ropeways.[Method]Considering the self-weight of the carrying cables and the friction effect between the cables and the saddles,a mechanical model of the cable tension at both ends of the horizontal-curved saddle was established based on the parabolic theory.Factors such as elastic elongation,chord length shortening,and temperature variation were incorporated to correct the model under loaded conditions.The 49#double-carrying-cable multi-span ropeway of the Xiamen Greenway Project was used as the research object,the tension data was measured under unloaded and loaded conditions to validate the model,and a sensitivity analysis was conducted on key parameters.[Result]Under unloaded conditions,the maximum relative error between the model calculations and measured values was 3.42%,and under loaded conditions,the maximum relative error was 3.95%,both of which were lower than the engineering tolerance threshold of 5%.The sensitivity analysis indicated that the friction coefficient was a key sensitive parameter affecting the model's calculation results:a±10%variation in the friction coefficient leads to approximately±3%deviation in tension.Temperature variation had a smaller effect:a±10℃temperature fluctuation resulted in a relative change rate below 1.1%.[Conclusion]The proposed tension model for both ends of the horizontal-curved saddle exhibits high calculation accuracy and strong engineering applicability,which can effectively support tension control,structural design,and safety assessment of double-carrying-cable multi-span cargo ropeways.