RESEARCH ON DISTRIBUTION OF DYNAMIC LOAD FACTOR OF TRANSMISSION BOX BASED ON LOAD SPECTRUM

ZHENG SongLin; MA Jiong; ZHAO LiHui; YU WeiYi; YAO ShouWen

doi:10.16579/j.issn.1001.9669.2019.05.030

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RESEARCH ON DISTRIBUTION OF DYNAMIC LOAD FACTOR OF TRANSMISSION BOX BASED ON LOAD SPECTRUM

更新时间：2022-09-22

- RESEARCH ON DISTRIBUTION OF DYNAMIC LOAD FACTOR OF TRANSMISSION BOX BASED ON LOAD SPECTRUM
- Journal of Mechanical Strength Vol. 41, Issue 5, Pages: 1206-1210(2019)
- 作者机构：
  
  1. 上海理工大学机械工程学院
  2. 机械工业汽车底盘零部件强度与可靠性评价重点实验室
  3. 北京理工大学机械与车辆学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.05.030
  CLC：
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ZHENG SongLin, MA Jiong, ZHAO LiHui, et al. RESEARCH ON DISTRIBUTION OF DYNAMIC LOAD FACTOR OF TRANSMISSION BOX BASED ON LOAD SPECTRUM. [J]. 41(5):1206-1210(2019)
DOI：

ZHENG SongLin, MA Jiong, ZHAO LiHui, et al. RESEARCH ON DISTRIBUTION OF DYNAMIC LOAD FACTOR OF TRANSMISSION BOX BASED ON LOAD SPECTRUM. [J]. 41(5):1206-1210(2019) DOI： 10.16579/j.issn.1001.9669.2019.05.030.

摘要

针对某特种车辆综合传动箱体强度过剩,质量过重的现状,需要对箱体进行进一步优化。而在优化过程中,传统方法基于转速转矩的经验公式计算一个较大的动载系数,减少了后续优化空间。基于载荷谱对平稳传动过程中的动载系数进行研究,首先对该箱体进行台架试验,测得危险部位的载荷谱,其次针对这些载荷谱进行处理获得一段平稳时间历程中的动载系数。运用极大似然法和拟合优度AD值对这些动载系数进行分布识别以及检验,最终获得99百分位的动载系数,并将其与经验公式计算动载系数进行对比,结果表明在平稳传动条件下,经验公式计算动载系数偏大,结构设计偏于保守,而99百分位动载系数较为合理,有助于轻量化设计的充分实现。

Abstract

In view of the excess strength and the excessive quality of a comprehensive transmission box which belongs to special vehicle, it is necessary to optimize box further. In the optimization process, based on the empirical formula of the rotational torque a larger dynamic load factor is calculated by using traditional method,which reduces the subsequent optimization space. Therefore, the dynamic load factors in the process of stationary transmission are studied based on the load spectrum. Firstly, the box body was tested by bench test, then the load spectrum of the dangerous part was measured. Secondly, the dynamic load factors in a stationary time history were obtained by dealing with these load spectrum. Thirdly, the maximum likelihood method and the goodness of fit AD value were used to identify and validate these dynamic load factors. Finally the dynamic load factor was obtained at 99 th percentile. The 99 th percentile dynamic load factor was compared with the dynamic load factor obtained from the empirical formula. The results show that under the condition of smooth transmission, the empirical formula is larger, the structural design is conservative, and the 99 th percentile dynamic load factor is reasonable, which is helpful to the realization of the lightweight design.

关键词

载荷谱动载系数分布拟合拟合优度传动箱箱体

Keywords

Load spectrumDynamic load factorDistribution fittingGoodness of fitTransmission box

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