将电缆束等效方法与传统的传输线方法相结合，提出了多芯电缆束的精简SPICE分析模型。首先采用有限元法求解等效电缆束的模型参数，然后在SPICE环境中进行时域分析。以14芯电缆束的串扰问题和4芯电缆束的辐射干扰问题为例，对精简分析模型的有效性进行了验证。全模型与精简模型分析结果表明，精简模型线缆芯线数减少了一半以上，仿真幅度误差在5%以内，分析效率提高50%以上。该方法适用于大线束传导耦合分析、串扰分析和辐射分析。

This paper presents a SPICE modeling method which combines the equivalent cable bundle method (ECBM) with the timedomain transmission line method. The parameters of the cable bundles are obtained by the finite element method. And the completed model and the reduced model are analyzed in SPICE. The computational efficiency of the models analyzing in time domain is enhanced by above 50%, compared with that for the traditional methods of frequency domain. The computation time and the memory required are greatly saved. Two numerical examples are adopted to validate the proposed model, and the results are in good agreement. The computational error is limited in 5%.The proposed method is suit for the analysis of the conducted coupling, crosstalk and radiated coupling of the cable bundles.