摘要
针对某型柴油机螺栓端面压紧联结方式在发动机功率进一步强化时发生了部分螺栓松脱、甚至螺栓和定位销被剪断的情况,对该联结方式做了改进,将原先的端面压紧联结改为圆锥过盈联结。通过经典弹性力学方法计算出合理的过盈量以保证联结的可靠性;同时采用有限元仿真软件ABAQUS得到了连接面接触应力的分布情况,验证了过盈量的合理性;分析了危险区域的应力集中现象,提出了降低应力集中的优化方案。
With the continuously strengthening of a certain diesel engine, the bolt joint between fly- wheel and crankshaft met the problems that part bolts loosened, sometimes the bolt and locating pin were even cut off. To deal with this problem, the joint method was improved, and changed the original bolt joint to cone interference fit. The effective interference value was calculated by the classic formula of Stretch Mechanics in order to guarantee the reliability of the interference fit. Meanwhile, the distribu- tion of contact stress and strain was obtained by finite element method which verified the rationality of the interference value. Moreover, the stress concentration phenomenon appeared in the dangerous area was analyzed and optimization scheme to decrease the stress concentration was proposed based on ABAQUS.
出处
《柴油机》
2014年第2期14-18,共5页
Diesel Engine
关键词
大功率柴油机
飞轮
联结
有限元方法
large power diesel engine
flywheel
cone interference fit
finite element method
