柴油发动机的活塞冲击力重建使用WOA-VMD和解卷
Shigong Fan1, Yixi Cai1, Yunxi Shi1
1School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013, China.
Sensors (Basel, Switzerland)
|June 27, 2024
概括
这项研究提出了一种新的方法,可以准确地确定柴油发动机中的活塞冲击力. 该技术使用优化的变量模态分解和解卷分析振动数据,帮助发动机设计.
科学领域:
- 机械工程 机械工程
- 汽车工程 汽车工程
- 振动分析 振动分析
背景情况:
- 活塞冲击是柴油发动机的主要激发源,发生在燃料燃烧时.
- 测量燃烧压力是可行的,但在没有直接测试的情况下,量化活塞冲击力是具有挑战性的.
- 传统的变量模态分解 (VMD) 方法易受噪声的影响,影响参数准确性和轻拍响应提取.
研究的目的:
- 开发和验证一种可靠的方法来识别柴油发动机中的活塞冲击力.
- 克服传统的VMD在噪声干扰方面的局限性,并提高冲击力计算的准确性.
- 为优化发动机结构设计提供对活塞振动特征的见解.
主要方法:
- 通过敲击测试,通过敲击测试获得了激发和振动响应之间的传递函数.
- 采用优化的变量模态分解 (VMD) 方法,利用鱼算法,将击响应与块表面加速隔离.
- 应用解卷,增强单数值分解和规则化,以计算冲击力和减轻不良条件.
主要成果:
- 通过使用优化的VMD.成功地将活塞冲击反应与发动机块表面加速分离.
- 通过使用单数值分解和调整的解卷方法,以更高的准确度计算了活塞冲击力.
- 开发的方法有效地解决了在解卷反向问题中常见的不良条件问题.
结论:
- 拟议的方法为准确评估柴油发动机中的活塞冲击力提供了一种可行的方法.
- 这种技术可以详细分析冲击力的角分布和活塞面上的冲击位置.
- 这些发现有助于更好地了解活塞振动特性,这对于优化柴油发动机结构设计至关重要.
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