چكيده به لاتين
Abstract:
114
Investigation of the dynamic behavior of different structures and predicting their behavior through
using Modal Analysis is an important topic. During machining operation of the flexible parts, due
to low stiffness of these parts, the force of the cutting tools applied to the workpieces can cause
some unwanted vibrations which may extremely affect the quality of the machining final product.
The main purpose of the present research is to provide a methodology for Modal Analysis and
finite element model updating of flexible parts, which is itself a part of a bigger research with the
goal of simulating machining process from the beginning to the end. In this research, various
methods of Modal Analysis, optimization methods and Dynamic Substructuring have been
adopted. In different sections, the results of Modal tests were considered accurate and were used
as the basis for the updating process. In particular, two industrial parts with two different
approaches and two numerical examples have been discussed. The analysis of the first industrial
workpiece that was ordered by the SAFRAN aerospace industry has been investigated by ANSYS
software, and for the second part which ordered by the COMEFOR company, VPS and SDT
software was used with emphasizing on using reduced model in the updating procedure by a hybrid
algorithm, which ultimately led to introducing a comprehensive method for evaluating the
dynamic behavior of flexible components under machining operations.
Keywords: Modal Analysis – Finite Element – Model Updating – Optimization – Dynamic
Substructuring
