Investigation of piston slap induced vibration of IC engine considering the coupled vibration of connecting rod, crankshaft and engine block
Investigation of piston slap induced vibration of IC engine considering the coupled vibration of connecting rod, crankshaft and engine block
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DOI：
10.1504/ijpt.2014.059412
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发表时间：
2014-02
影响因子：
--
通讯作者：
Guangze Zheng;K. Ohta
中科院分区：
文献类型：
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作者：
Guangze Zheng;K. Ohta
活塞拍击是发动机内部冲击激励产生复杂的瞬时振动响应的主要原因。在传统的活塞拍击分析模型中，只考虑了活塞与缸套的耦合振动。为了准确估计内燃机活塞拍击引起的振动，提出了一种考虑活塞、连杆、曲轴和机体的运动和耦合振动的活塞拍击理论模型。在此模型的基础上，对某3.5型L柴油机的活塞拍击和振动响应进行了预测。详细讨论了该方法与常规方法在活塞转角、活塞拍击冲击力、曲轴扭转振动、主轴承反作用力以及机体振动响应等方面的比较。研究结果表明，耦合振动对活塞拍击的影响很大，活塞拍击对曲轴扭转振动特性、主轴承反作用力和机体反向振动响应也有影响。
Piston slap is a major cause of the complex transient vibration response related to the impact excitation inside the engine. In the conventional analytical model of piston slap, the coupled vibration of piston and cylinder liner was taken into consideration only. In order to estimate the piston slap induced vibration of IC engine accurately, a theoretical model of piston slap which considering the movement and coupled vibration of piston, connecting rod, crankshaft and engine block was proposed. Based on this model, the piston slap and vibration response of some type of 3.5 L diesel engine were predicted. Then the comparison of rotate angle of piston, impact force induced by piston slap, torsional vibration of crankshaft, reaction force acting on main bearing and the vibration response of engine block between the present method and conventional method have been discussed in details. Research results revealed that the coupled vibration takes seriously influence on piston slap and the piston slap also influences the characteristic of crankshaft torsional vibration, reaction force at main bearing and vibration response of engine block inverse.