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本文利用光弹性实验的直观、适于选型等特点,为巨型钳夹式变压器油箱的箱耳选型。由于箱耳与油箱纵向侧壁框架连成一体,故取油箱的侧壁框架和箱耳为一体来进行研究。但是,侧壁框架是由薄壁槽形截面杆件组成,其几何相似模型制做困难。本文将侧壁框架设计成矩形截面的变态模型,模型设计公式根据相似理论导出;模型箱耳与实物完全相似。由此模型所测得的箱耳的应力分布是符合实际的。通过光弹性实验,最终为钳夹式变压器油箱选出了合理形状。
In this paper, the use of optical elasticity experiment intuitive, suitable for selection and other characteristics for the giant clamp-type transformer tank box ears selection. As the box ears and tank vertical side wall frame into one, so take the tank side wall frame and the box ear as a whole to carry out research. However, the side wall frame is composed of thin-walled groove-shaped cross-section members and the geometric similarity model is difficult to manufacture. In this paper, the side wall frame is designed as a rectangular section of the metamorphosis model, the model design formula is derived based on the similarity theory; model box ears and the physical is completely similar. The stress distribution of the box ears measured by this model is realistic. Through photoelastic experiments, a reasonable shape was finally chosen for the clamped transformer tank.