考虑挡位组合策略的多挡变速箱仿真载荷谱获取方法

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中图分类号：U463.212 文献标志码：A 文章编号：1000-582X（2025）07-013-14

Simulation load spectrum acquisition method of multi-gear gearbox considering gear combination strategy

LIURenping'，HUJianjun'，XUE Shouzhi’，LYU Chang，SUN Dandan

（1.State Key Laboratory of Mechanical Transmisson for Advanced Equipment， Chongqing University，

Chongqing 400044，P.R.China; 2. Xuzhou XCMG Driveline Technol Co.，Ltd.，Xuzhou， Jiangsu 221004， P. R. China）

Abstract：Thecurrent gearbox simulation load spectrum is difficult to fully reflect the load stateof the gearbox gear，because driver’s intention is not fully considered.Inorder to improve the accuracyof gearbox reliability analysis，a mining vehicle equipped with a 12 speed gearbox was taken as the research object. Based on the shifting rules of power and economy，a multi-gear gearbox simulation load spectrum acquisition method considering gear combination strategy was proposed by fully considering the allowable gears of diferent vehicle speeds.Based on the driver conditions of mining vehicle，the proposed method was used to obtain multi-gear gearbox simulation load spectrum，and compared with the simulation load spectrum obtained based on power and economic shifting schedule.Theresult show that compared with the traditional methodofobtaining load spectrum based on shifting schedule，the proposed method obtains different critical gears.The critical gear obtained by traditional method is 6th gear，with a working time accounting for 53.25% ，and the proportion （53.14%） isthe highest in the load range of 2 000N⋅m⋅2 400N⋅m .Theproposed method obtainsthe critical gearis7th gear，with a working time accounting for 54.49% ，and the proportion is the highest （52.78% ）intheloadrange of 2400N⋅m～ （204号 2800N⋅m .From the perspective of load accumulation， it can be observed that the obtained 7th gear load accumulation of the proposed method increases 2.33% compared with the obtained 6th gear load accumulation of the traditional method.The research result prove the efectiveness of the proposed method and laythe foundation for the reliability design of multi-gear gearbox.

Keywords： load spectrum; rain flow counting method; power shift; economic shift; multi-gear gearbox

载荷谱是描述零件承载状况的载荷-时间历程，在确保结构的可靠安全、设计优化和疲劳分析等方面有着重要作用，已在航天、铁路、汽车等领域得到广泛应用]。（剩余12961字）