Fretting damage prediction of connecting rod of marine diesel engine
Fretting damage prediction of connecting rod of marine diesel engine
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DOI：
10.1007/s12206-010-1206-6
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发表时间：
2011-03
影响因子：
1.6
通讯作者：
J. Son;S. Ahn;J. Bae;M. Ha
中科院分区：
文献类型：
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作者：
J. Son;S. Ahn;J. Bae;M. Ha
由于内燃机连杆载荷大、旋转频繁，连杆配合面经常发生微动损伤。采用含弹流动力学模型的柔性多体动力学分析方法计算了连杆在一个周期内的实际受力，并应用于全循环仿真。采用Ruiz准则预测了海头式连杆平面上劈裂处的微动可能性，该准则需要三个主要参数：滑移、切向和剪切应力。与基于多轴疲劳破坏的预测模型相比，Ruiz准则更为简单实用。将对船用柴油机连杆上裂处的微动损伤预测与实际运行2万小时后的检测结果进行了对比。
There is frequent fretting damage at the mating surface of a connecting rod because the connecting rod in a combustion engine is heavily loaded as well as rotated. The flexible multi-body dynamic analysis including the elasto-hydrodynamic model is introduced to calculate the actual force acting on the connecting rod that is applied to the full cyclic simulation during one cycle. The fretting possibility at the planar upper split of the marine-head type of connecting rod is predicted by the Ruiz criterion that requires three main parameters: slip, tangential and shear stress. The Ruiz criterion is more simple and useful than the prediction model based on multi-axial fatigue failure. The fretting damage prediction at the upper split of the marine diesel engine’s connecting rod is compared to the actual inspection result taken after 20,000 running hours.