连接螺纹在塑性变形下的受力特性及参数优化  

Stress Characteristics and Parameters Optimization of Coupling Thread with Plastic Deformation

作　　者：崔继强[1] 徐和林 刘学强 施境岭 邓承东 

机构地区：[1]滨州学院实训中心 [2]中航工业四川凌峰航空液压有限公司 [3]山东滨州渤海活塞公司 [4]中国石油集团渤海石油装备制造有限公司石油机械厂

出　　处：《石油机械》2014年第8期49-52,共4页China Petroleum Machinery

基　　金：滨州学院青创基金资助项目(BZXYQNLG201101)

摘　　要：结合某航空工程结构试验背景,利用有限元法对塑性变形下的配合螺纹进行仿真及应力特性研究,指出了在塑性变形下配合螺纹的应力分布特点,并对比区别未发生塑性变形下配合螺纹的应力分布特性;以前面3螺纹齿高为优化变量,采用Workbench软件,以齿根最大应力相等为优化目标,对配合螺纹齿高参数进行优化设计。优化结果表明,连接螺纹在塑性变形不一致的情况下,要使应力与齿高对载荷分配之间达到等强度匹配,则需保证前端3螺纹齿高基本一致,且齿高约为原齿高的;随着齿高的增加,齿根最大应力以及相互牙根应力差也随之增大。研究结果可为塑性变形下配合螺纹的应力分布特性及齿根等应力优化提供参考。Combining an aeronautical engineering structure testing, the coupling thread with plastic deformation is simulated and its stress characteristics are analyzed by using finite element method. The stress distribution characteristics of coupling thread with plastic deformation are obtained and compared with that of coupling thread without plastic deformation. Taking the height of front three threads as variables and the maximum stress of the thread root as object, the height of coupling thread is optimized by using Workbench software. The results show that, to make the stress inconsistency in the thread with plastic deformation match the load distribution by thread height in equal strength, the height of front three threads need to be consistent and with a height of 2/3 original height. With the increase of thread height, the maximum stress of thread root and the stress difference between each thread root increases. The study results provide references for stress distribution characteristics and optimization of thread root stress of coupling thread with plastic deformation.

关 键 词：配合螺纹 塑性变形 优化设计 等强度 参数优化 

分 类 号：TH131.3[机械工程—机械制造及自动化]