电缆金属波纹管护套的压力伸长特性的计算

波纹管作为金属护套在电线电缆制造领域使用广泛,但波纹管受压后易发生轴向位移,会影响电缆的电气性能及其接头接续。一般是通过增加钢丝编织来控制轴向位移,但会增加生产成本。利用CAD/CAE计算机辅助设计软件,建立不同结构、不同厚度的波纹管三维模型,并进行有限元分析。同时,制备一段电缆样品,参照行业相关标准设计验证试验。通过有限元模拟和试验数据对比分析,寻求波纹管不同结构、不同厚度和伸长率之间的定量关系,为今后波纹管的设计提供了参考依据。

Calculation of Pressure Elongation Characteristics of Metal Bellows Sheath of Cable

Bellows is widely used in the field of wire and cable manufacturing,but it is easy to have axial displace ment after compression,which will affect the electrical performance of the cable.Generally,the axial displacement is controlled by increasing steel wire braiding,but the production cost will be increased.The 3D model of bellows with different structure and thickness will be established by CAD/CAE software,and carry out finite element analysis.At the same time,according to relevant industry standards,a section of the cable sample is prepared and the verification test is designed.Through the comparison and analysis of the finite element simulation and test data,the quantitative relationship among the different structure,thickness and elongation of the bellows is found,which provides a refer ence for the design of bellows in the future.