| 彭飞.螺栓预紧力对发动机气缸盖疲劳特性的影响[J].唐山学院学报,2020,33(3):56-59 |
| 螺栓预紧力对发动机气缸盖疲劳特性的影响 |
| Effect of the Bolt Pretightening Force on the Fatigue Properties of Engine Cylinder Head |
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| DOI：10.16160/j.cnki.tsxyxb.2020.03.012 |
| 中文关键词: 发动机 气缸盖 螺栓预紧力 疲劳特性 |
| 英文关键词: engine cylinder head bolt pretightening force fatigue property |
| 基金项目: |
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| 中文摘要: |
| 发动机气缸盖是较易发生疲劳破坏的发动机零件之一，其机械疲劳强度与螺栓预紧力之间存在关系。利用Solidworks建立气缸的简化模型，导入Workbench中进行静力学分析：在Workbench中建立两个不同的载荷环境，利用组合求解功能对螺栓预紧力和气缸盖受到气缸内气体的最高爆发压力进行线性组合，完成非比例载荷的疲劳寿命计算，得到不同螺栓预紧力下的气缸盖疲劳寿命曲线，由此获知螺栓预紧力和气缸盖疲劳寿命之间的关系，这为合理选择螺栓预紧力提供了依据。 |
| 英文摘要: |
| The engine cylinder head is one of the parts prone to fatigue damage, whose mechanical fatigue strength is related with the pretightening force of the bolts. In this paper, the Solidworks is used to establish a simplified model of the cylinder, which is imported into Workbench for static analysis: Two different load environments are established and a linear combination is carried out for the bolt pretightening force and the maximum burst pressure of the gas in the cylinder to its head, then the fatigue calculation of non-proportional load is completed, and the fatigue life curves of cylinder head under different bolt pretightening forces are obtained. In this way, the relationship between the bolt pretightening force and fatigue life of the cylinder head is known, which can provide a reference for a reasonable selection of bolt pretightening force. |
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