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Design optimization of joint parameters using Frequency Based Substructuring
Author(s) -
El Mahmoudi Ahmed,
Paracha Umer S.,
Rixen Daniel
Publication year - 2019
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201900454
Subject(s) - noise, vibration, and harshness , vibration , substructure , context (archaeology) , engineering , computer science , structural engineering , control theory (sociology) , acoustics , paleontology , physics , control (management) , artificial intelligence , biology
Abstract Dynamic Substructuring (DS) is a research field that has gained high attention in both science and industry. The aim of DS techniques is to provide engineers in structural vibrations and sound practical solutions to analyze the dynamic behavior of complex systems. This paper addresses the design optimization problem of joint parameters to reduce the magnitude of the total system response in the context of the Lagrange Multiplier – Frequency Based Substructuring (LM‐FBS) coupling process. For illustration, we use rubber bushings from an automotive application in the field of noise, vibration and harshness (NVH). Depending on which parameter is changed on the respective rubber bushing, it has an influence on the sound pressure in the total vehicle system. By grouping the joints into engine mounts, front suspension and rear suspension mounts, a method is proposed to implement an optimization function within the LM‐FBS approach. For this purpose, the rubber bushings are considered as a substructure using the pseudoinverse method, so that in order to determine the optimum parameters, an optimization function only has to be established for the substructure of the bushings in relation to the total system result.