Варианты учета контактного взаимодействия в бандажных полках при расчетах собственных колебаний лопаточного венца методом конечных элементов

Abstract

This paper presents the computational investigation on the influence of the finite element simulation method of contact interaction between shrouds on the natural frequency spectrum of blade rows. In the simulation of blade rows we assumed their structural rotational symmetry. The problem is solved using the finite element method. Three approaches to taking into account the contact interaction between shrouds are considered: 1. Applying of the compatibility conditions of nodal displacements at the nodes where non-zero contact pressures are observed; 2. Development of elastic elements (the values of the stiffness coefficient correspond to those of the contact pressure at the corresponding nodes); 3. Combination of the first and second approaches.