Monte Carlo simulation of strand motion in CIC conductor
Monte Carlo simulation of strand motion in CIC conductor
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CIC 导体绞线运动的蒙特卡罗模拟
DOI：
10.1109/77.828423
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发表时间：
2000
影响因子：
1.8
通讯作者：
T. Satow
中科院分区：
文献类型：
--
作者：
T. Sasaki;T. Nishiura;S. Nishijima;T. Satow
采用蒙特卡罗方法模拟了索管内导线中股线的运动，分析了索管内导线的稳定性。由于没有阐明股线在通电过程中的行为，因此没有对股线运动引起的摩擦热、股线之间的接触应力和耦合损失进行定量讨论。通过压缩电缆，在计算机中构造了空隙率为38%的CIC导体。在蒙特卡罗方法中，通过改变网格划分中股线的位置，使势能最小。它可以模拟由洛伦兹力引起的股线运动。发现股线之间的摩擦加热在股线密度高的区域处高。通过计算股线位置的磁滞回线来估计通电期间的机械损失。本文还利用所提出的方法计算了通电和放电过程中股线间接触应力的变化。当管道中的股线位置被澄清时，电流不平衡也可以被评估，因为每个股线的电感可以被估计。使用这种方法，将有可能估计CIC导体的稳定性。
Strand motion in a cable-in-conduit (CIC) conductor has been simulated by means of Monte Carlo method in order to analyze the stability of the CIC Conductor. A quantitative discussion about the frictional heating induced by strand motion, the contact stress between strands and the coupling losses has not been made because the behavior of strands during energizing has not been clarified. A CIC Conductor with 38% of void fraction was constructed in a computer by compressing the cable. In the Monte Carlo method, the position of strands which were divided into mesh were changed to minimize the potential energy. It could simulate the strand motion induced by the Lorentz force. The frictional heating between strands was found to be high at the area where the density of the strands was high. The mechanical losses was estimated during energizing by calculating the hysteresis loops of the strand position. The method developed in this work is also used to calculate the change of the contact stress between strands during energizing and discharging. When the strand positions in the conduit are clarified, the current imbalance could be also evaluated because the inductance of each strand can be estimated. Using this method, it would be possible to estimate the stability of a CIC Conductor.