| 刘东,湛秀宇,胡皓鲤,等.柴油机缸套–水套系统的声振耦合特性[J].内燃机工程,2026,47(1):158-168. |
| 柴油机缸套–水套系统的声振耦合特性 |
| Vibro–Acoustic Coupling Characteristics of the Cylinder Liner–Water Jacket System for Diesel Engines |
| DOI：10.13949/j.cnki.nrjgc.2026.01.017 |
| 关键词:柴油机 缸套–水套系统 声振耦合 振动 压力波动 |
| Key Words:diesel engine cylinder liner–water jacket system vibro–acousticcoupling vibration pressure fluctuation |
| 基金项目:国家自然科学基金项目（51805353） |
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| 摘要点击次数: 76 |
| 全文下载次数: 44 |
| 摘要:针对缸套与水套之间存在的强耦合效应，建立了一个涵盖活塞摩擦动力学、缸套结构动力学和水套声学的系统性分析模型，重点分析了活塞拍击下的缸套振动和冷却液压力波动特性，并通过试验进行了验证。结合耦合模态和动态响应分析，阐明了振动和压力分布存在差异的根本原因，揭示了缸套–水套系统的声振耦合机制。结果表明，缸套外壁的冷却液会为系统提供额外的质量和阻尼，从而使缸套的模态频率和振动幅值显著下降。在所研究的发动机中，最大振动出现在水套上部，而高负压区出现在水套下部。缸套–水套系统的振动和压力分布特性与活塞拍击、耦合模态和水套声边界有关。 |
| Abstract:Aiming at the strong coupling effect between the cylinder liner and the water jacket， a systematic analysis model encompassing piston tribo-dynamics， cylinder liner dynamics， and water jacket acoustics was developed， focusing on the cylinder liner vibration and coolant pressure fluctuation characteristics under the piston slap， which was verified by experiments. Combined with the coupled modal and dynamic response analyses， the root causes of the differences in vibration and pressure distributions were elucidated， and the vibro-acoustic coupling mechanism of the cylinder liner–water jacket system was revealed. The results show that the coolant provides an added mass and damping effect to the system， leading to a significant decrease in the modal frequency and the vibration response amplitude of the cylinder liner. In the studied engine， the maximum vibration occurs in the upper part of the water jacket， while the high negative pressure appears in the lower part of the water jacket. The vibration and pressure distribution characteristics of the cylinder liner–water jacket system are related to piston slap， coupled modes， and water jacket acoustic boundaries. |
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