摘要
活塞拍击是内燃机中最主要的机械噪声源，降低活塞拍击是改善内燃机振动噪声性能的技术措施之一。本文考虑活塞、连杆、曲轴以及缸体的耦合振动对活塞拍击的影响，建立活塞拍击动力学分析模型，研究了某型柴油机的活塞拍击及缸体振动响应。探讨了活塞裙部轮廓形状、偏置活塞销对活塞拍击及缸体辐射噪声的影响，计算结果和实验数据证明：活塞轮廓形状对活塞拍击的频率成分的分布及噪声品质有重要影响，活塞销向主推力面适当偏置有助于降低活塞拍击及辐射噪声水平。
Abstract
Piston slap is a major noise source of internal combustion engine. Reduce piston slap is one of the most important countermeasures to improve the noise and vibration ability of internal combustion engine. The influence of the coupled vibration of piston, connecting rod, crankshaft and engine block on piston slap is taken into consideration, and an analytical model of piston slap is developed in this paper. The piston slap induced impact force and vibration response of engine block is investigated based on present model. The effect of piston skirt profile and piston pin offset on piston slap and radiated noise of engine block is discussed. The calculate results and experiment data shown that the profile of piston skirt has a significant influence on high frequency component of piston slap induced impact force and engine noise quality, that piston pin offset to major thrust side can decrease the maximum value of piston slap force and sound pressure level of radiated noise.
关键词
内燃机 /
耦合振动 /
活塞拍击 /
裙部形状 /
活塞销偏置
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Key words
Internal combustion engine /
Coupled vibration /
Piston slap /
skirt profile /
pin offset
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郑光泽.
考虑内燃机系统耦合振动的活塞拍击研究[J]. 振动与冲击, 2013, 32(11): 167-172
Zheng Guangze.
Research on Piston Slap Considering Coupled vibration of Internal Combustion Engine[J]. Journal of Vibration and Shock, 2013, 32(11): 167-172
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脚注
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