Abstract
AbstractAimed at the typical annular flat connection structure in the heavy-duty gas turbine, based on the Archard wear theory and finite element method, the influences of tie rod parameters and material properties on the fretting damage characteristics of the annular flat contact interface are studied. The results show that the preload mistuning of tie rod will result in the uneven distribution of fretting characteristics in the circumferential direction. With the tie rod approaches to the annular flat, the relative slip distance and shear stress decrease, while the contact pressure increases at the inner side of annular flat and decreases at the outer side of the annular flat. The material properties have little effect on contact pressure. When friction coefficient, elastic modulus and Poisson’s ratio of annular flat increase, the shear stress, slip distance and wear depth decrease. The researches can provide a reference for the mechanism design and engineering application of the annular flat connection structure.KeywordsPreload mistuning of tie rodFretting characteristicsAnnular flatFretting wear
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