层叠焊接金属波纹管承压能力以及在循环拉压作用下的力学分析  

Numerical Simulation of Mechanical Behavior of Stack-Welded Bellow under Cyclic Tension and Compression

作　　者：张泽东[1] 王国栋[1] 陈长琦[1] 柯超[1] 时仪 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009

出　　处：《真空科学与技术学报》2016年第5期597-601,共5页Chinese Journal of Vacuum Science and Technology

基　　金：中央高校基本科研业务费专项资金资助(2013HGQC0031)

摘　　要：采用有限元软件分析了层叠焊接波纹管在循环拉压载荷作用下应力与应变的非线性关系、弹性工作区域的变化、弹性极限的变化等。用数值法、工程近似法、有限元法分别计算波纹管的刚度,得到的结果两两差率不超过7.4%,证明了用有限元方法对波纹管仿真模拟的可行性。为研究波纹管承压能力,将两种材料、三种波厚、四种中径两两组合,建立24个模型,在内压和外压的工况下共做了48次模拟试验。通过对比分析数据,最终得到了材料、波厚、中径对波纹管承压能力的影响。The mechanical behavior of the stack-welded bellow under cyclic tension and compression was empirically formulated in engineering approximation,mathematically modeled,theoretically analyzed and numerically simulated in finite element method（ FEM）. The impact of the realistic situation,including but not limited to the size,thickness,material and inner diameter of a single plate and compression displacement,on the stiffness and bearing capacity of the bellow,was numerically investigated. The simulated results show that the bearing capacity of the bellow,under internal and / or external compression,strongly depends onthe yield strength of the material and thickness of a plate,but weakly on the inner diameter. To be specific,a stack-welded bellow,consisting of thicker plates with higher yield strength,displays stronger bearing capacity. We suggest that the FEM simulated results may be of some technological interest in design and applications of the stack-welded metal bellow.

关 键 词：层叠焊接波纹管 循环拉压载荷 刚度 承压能力 

分 类 号：TB125[理学—工程力学] TB754[理学—力学]