大跨越架空线路的档距大，水面平坦，极易形成较强的层流风，微风振动是防护的重点。现场安装的防振措施均通过初步设计和实验室内模拟试验后确定。为减少大跨越防振试验次数，优化防振措施，介绍基于神经网络建立的大跨越防振辅助设计专家系统，该专家系统通过对以往大量工程实例的学习，自动从实例中提取防振方案花边布置方法，为模拟试验提供优化的防振方案。最后结合工程实例，采用专家系统进行了辅助设计，结果表明，经专家系统优化后的防振方案防振效果更明显。

As a result of long-span and flatness of water surface at river and straits-crossing, the laminar flow is easy to excite bigger vibration of conductor, so the aeolian vibration is the emphasis of safety for long-span overhead transmission lines. The anti-vibration measures must be planned and tested in the lab before installation in the practice. To achieve the aim of reducing the number of tests in lab and optimizing the anti-vibration measures, an anti-vibration aid-design expert system was developed based on BP neural network. The expert system was trained with a large number of the project examples, and could obtain b wire dampers’ design parameters from them, eventually an anti-vibration measure was provided by the expert system automatically which could be used in the anti-vibration design for practical projects. Experimental results show that the anti-vibration measure designed by the expert system not only is capable of passing the assessment in lab, but also has a good effect of anti-vibration.