A fully connected network is investigated with signed (friendly or hostile) links. We consider a time evolution which drives the network to a structurally balanced state. Usually a hypothesis is made tacitly that the states of links can be permanent. However in real networks these states can fluctuate. In this paper, we assign a lifetime to each link. When a link age exceeds its lifetime, its sign is substituted by a random value $\pm 1$ and its age is set to zero. Then, two asymptotic behaviors are observed. When the lifetime is large, the system is balanced with only small fluctuations. When the lifetime is short, the system fluctuates randomly, far from the balanced state. A crossover is observed between these two regimes. The age distribution of the links depends on the lifetime. The results are discussed in the context of data on selected conflicts between political actors in Europe and the Middle East in the XX century.

使用签名（友好或敌对）的链接对完全连接的网络进行调查。我们考虑时间演化，它将网络驱动到结构平衡状态。通常会默认一个假设，即链接的状态可以是永久的。但是，在实际网络中，这些状态可能会波动。在本文中，我们为每个链接分配生命周期。当链接寿命超过其生存期时，其符号将替换为随机值$\pm \mathrm{1个}$并将其年龄设置为零。然后，观察到两种渐近行为。当使用寿命长时，系统的波动很小。寿命短时，系统会随机波动，远离平衡状态。在这两个制度之间观察到交叉。链接的年龄分布取决于生存期。在有关二十世纪欧洲和中东政治角色之间选定冲突的数据的背景下讨论了结果。