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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,本实验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情况的。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 bar members, and its geometric similarity model is difficult to manufacture. In this experiment, the side wall frame is designed as a rectangular section metamorphosis model. The model design formula is derived based on the similarity theory. Exactly the same, the stress distribution of the box ears measured by this model is in line with the actual situation. The photoelastic experiment culminated in the selection of a reasonable shape for the clamped transformer tank.