一种混合的CFD/多体分析方法,用于塑料油的弹性水力动力学
Dongxin Pan1, Yangyang Dong2,3, Lu Ban1
1Nanning University, Nanning, 530200, China.
Scientific reports
|November 29, 2025
概括
这项研究引入了一种用于分析塑料油中的发动机噪声,振动和度 (NVH) 的新方法. 与金属油相比,塑料油显著降低了噪音并改善了模态频率.
科学领域:
- 汽车工程 汽车工程
- 机械工程 机械工程
- 声学 声学 在声学方面
背景情况:
- 噪音,振动和度 (NVH) 是影响车辆耐用性,舒适性和监管合规性的关键因素.
- 薄壁发动机组件,如油,显著影响整体NVH性能.
- 现有的方法可能无法完全捕捉影响发动机NVH的复杂水力动力学和结构相互作用.
研究的目的:
- 提出和验证一种新的计算流体动力学 (CFD) 和有限元多体分析 (FEA) 混合方法,用于评估发动机油板NVH.
- 分析塑料油的动态特性,并确定影响凸轮轴速度波动的水力动力学和结构因素.
- 为了比较塑料油与传统金属油的NVH性能.
主要方法:
- 采用了混合方法,将CFD用于模拟油空两相流和FEA用于结构和多体动力学.
- CFD模拟显示了重力负荷下的塑料油中的油流演变.
- 结合了液体粘度效应和固体表面的多体相互作用来评估NVH.
主要成果:
- 与金属油相比,塑料油的模式频率增加了31.20%-42.04%.
- 在塑料油板中观察到2.97.2dB的声功率水平降低.
- 拟议的方法准确模拟了弹性水力动力学,并确定了关键的NVH因素.
结论:
- 综合CFD-FEA方法有效地分析塑料油板的NVH特性.
- 塑料油提供卓越的NVH性能,包括更高的模态频率和降低的声功率水平.
- 这项研究为设计具有增强NVH特性的现代柴油发动机提供了关键的见解.
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