摘要
为经济有效地获取任意长度七芯铠装电缆的传输特性,基于多导体传输线理论对七芯铠装电缆的传输特性进行建模仿真分析。首先采用有限元方法计算模型参数即电缆单位长度分布参数,将趋肤效应和钢制铠装邻近效应的影响计算在内;然后以相似变化思想解模型方程即多导体传输线方程,获得电缆近端及远端传输特性曲线;最后以长度为3 km的七芯铠装电缆为例,将模型仿真结果与实测数据进行对比,证明模型的有效性。结果表明:外围缆芯的传输特性更加复杂多变且衰减剧烈;中间缆芯的传输特性衰减变化较平缓,更适合用于高速通信。
In order to obtain the transmission characteristics of seven-core armored cable of arbitrary length in a cost-effective manner, based on the theory of multiconductor transmission lines, the transmission characteristics of seven-core armored cable were simulated and analyzed. Firstly, the finite element method was used to calculate the cable unit length distribution parameters, and the effect of the skin effect and proximity effect caused by steel armor were calculated. Then, the transmission equation of the multiconductor was solved by the similarity transformation idea. Finally, the simulation results of seven-core armored cable with length of 3 km were compared with the measured data, which proved the effectiveness of the model. The results show that the transmission characteristics of the outer cable core are more complicated and decay drastically. The transmission characteristics of the inter cable core change more slowly and more suitable for high-speed transmission.
出处
《中国测试》
北大核心
2017年第4期118-124,共7页
China Measurement & Test
基金
国家自然科学基金项目(41074074)
关键词
七芯铠装电缆
多导体传输线
有限元仿真
传输特性
seven-core armored cable
multiconductor transmission line
finite element simulation
transmission characteristics
