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Position: Home > Articles > Influence of multi-body dynamics modeling method on simulation of engine main bearing force Transactions of the Chinese Society of Agricultural Engineering 2008,24 (12) 65-69

多体动力学建模方法对发动机主轴承载荷计算影响

作  者:
李民;舒歌群;卫海桥
单  位:
天津大学内燃机燃烧学国家重点实验室
关键词:
多体动力学;安装方式;联轴节;主轴承;柔性体
摘  要:
使用模态综合法,在ADAMS中建立刚柔混合的4100QB柴油机多体动力学模型,研究了多体动力学建模方法对发动机主轴承载荷计算的影响。通过比较不同模型间主轴承载荷的差异,探讨了发动机曲轴和机体的柔性、发动机安装方式和联轴节等建模因素对主轴承载荷计算的影响。结果表明:曲轴、机体柔性及发动机安装方式对轴承载荷计算影响显著;柔性联轴节对主轴承载荷的影响可以忽略。最后利用实测的气缸体表面节点振动数据验证了多体动力学计算结果的有效性。
译  名:
Influence of multi-body dynamics modeling method on simulation of engine main bearing force
作  者:
Li Min,Shu Gequn,Wei Haiqiao(State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China)
关键词:
multi-body dynamics,installation method,shaft coupling,main bearings,flexible body
摘  要:
4100QB diesel flexible multi-body dynamics model was built by employing the modal synthesis technique in the software Adams,and the application of multi-body dynamics modeling method in simulation of engine main bearing force was carried out.By comparing the simulation results of different models,the effects of flexibility of cylinder block and crankshaft,installing method of engine and the elasticity of shaft coupling were also discussed.The results showed that the flexibility of cylinder block and crankshaft,as well as the installing method of engine,played an important role in main bearing force calculation.The influence of elastic shaft coupling was negligible in simulation of main bearing force.Finally,the simulation result was validated by the measuring engine block vibration acceleration.

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