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母线连接会影响互连电气设备的动力特性,并可能在地震作用时加重互连设备的震害.该文研究了用于连接互联高压电气设备的软母线的力学特性,并提出了一种考虑地震影响的软母线长度计算方法.通过ANSYS/LS DYNA软件建立与试验结果吻合的软母线有限元模型,将互连设备简化为双自由度–母线系统,以满足IEEE 693设计谱要求的人造地震动作为标准输入,根据规范最大许用拉力来计算软母线所需的长度.选取了不同场地类型的14条天然地震动记录,对两组典型互连电气设备进行了动力时程分析,验证了该母线长度计算方法的有效性.“,”Flexible conductors may affect the dynamic characteristics of connecting equipment and aggravate the seismic damage during earthquakes. A flexible conductor slack determination method is proposed in this paper. ANSYS/LS DYNA is used to simulate the flexible conductor mechanical response. The accuracy of the finite element model is calibrated by comparing with test. Earthquakes, matching with IEEE 693 spectrum, are chosen as standard input for slack determination. In order to demonstrate the effectiveness of this method, the required slack of two sets of typical connecting equipment under 14 natural ground motion records are calculated. Results show that this method is efficient and does have enough redundancy. Besides, The governing equations and