Magnetostriction is an inherent property of an electrical steel sheet (ESS). Experimental measurements have revealed that the magnetostrictions of Grain-oriented and Non-oriented ESSs are mostly opposite in their directions. Based on this, a novel structure of gap reactor is suggested to reduce the mechanical vibration of the reactor. The new structure follows the conventional manufacturing process, and is built by stacking Grain-oriented and Non-oriented cores alternately while a conventional one is by only Grain-oriented or Non-oriented core. In order to verify the effectiveness of the proposed structure, the electromagnetic vibration, stress and displacement of the reactor are analyzed based on the magneto-elastic coupled analysis. The measured magnetization and magnetostriction data of the ESSs are adopted during the numerical calculation. Prototypes of new and traditional structures with the same design parameters were also built and electromagnetic-induced vibration were measured and analyzed. Both the computational and experimental results showed that the proposed structure made much less electromagnetic vibration than the conventional one. Moreover, the noise level around the reactors were measured and the average noise level around the improved prototype was reduced by 16.7%.

磁致伸缩是电工钢板（ESS）的固有特性。实验测量表明，晶粒取向和非取向ESS的磁致伸缩在其方向上大多相反。基于此，提出了一种新型的间隙电抗器结构，以减少电抗器的机械振动。新结构遵循传统的制造工艺，并通过交替堆叠晶粒定向和非定向磁芯来构建，而传统结构仅通过晶粒定向或非定向磁芯构建。为了验证所提出结构的有效性，在磁弹性耦合分析的基础上，对反应堆的电磁振动，应力和位移进行了分析。在数值计算过程中，采用了测得的ESS的磁化和磁致伸缩数据。还建立了具有相同设计参数的新结构和传统结构的原型，并测量和分析了电磁感应振动。计算和实验结果均表明，所提出的结构比传统结构产生的电磁振动要少得多。此外，测量了反应堆周围的噪音水平，改进后的原型周围的平均噪音水平降低了16.7％。