Abstract: Aiming at the transmission development project of a pure electric construction machinery, the dynamic model of the transmission system of the gearbox gear is established in MASTA, and the vibration and noise caused by the transmission error of the gearbox gear are studied. The influence of the flexibility of the gearbox shell, shaft and gear spokes on the transmission error is explored by using the full finite element mesh technology, and the transmission error of the gear is reduced and the contact state of the tooth surface is improved through micro modification, The vibration response of the transmission is reduced. The results show that the vibration response of the transmission can be significantly reduced and the noise, vibration, harshness (NVH) performance of the transmission can be improved by appropriately increasing the micro modification parameters of the gear teeth. It provides a basis for controlling the vibration response of the gearbox at the initial stage of design, and provides a solution to the abnormal sound of the whole vehicle at the later stage, which has strong engineering applicability.

Key words: Construction machinery; Micro shaping; Transmission error; Vibration response; NVH; MASTA

摘要： 针对某纯电动工程机械变速器开发项目，在 MASTA 中建立变速器齿轮传动系统动力 学模型，对因变速器齿轮传递误差而引起的振动噪声进行研究，利用全有限元网格技术探究 了变速器壳体、轴及齿轮轮辐的柔性化对传递误差的影响，并通过微观修形，减小齿轮传递 误差，改善了齿面接触状态，降低了变速器振动响应。研究结果表明，增加合理轮齿微观修 形参数, 可明显减小变速器振动响应，改善变速器的噪声、振动与声振粗糙度（NVH）性能。 为设计初期控制变速器振动响应提供依据，为后期整车异响提供解决思路，具有较强的工程 适用性。

关键词: 工程机械；微观修形；传递误差；振动响应；NVH；MASTA