TY - JOUR
T1 - Topology optimization of large-scale structures subjected to stationary random excitation
T2 - An efficient optimization procedure integrating pseudo excitation method and mode acceleration method
AU - Zhang, Weihong
AU - Liu, Hu
AU - Gao, Tong
N1 - Publisher Copyright:
© 2015 Published by Elsevier Ltd.
PY - 2015/6/18
Y1 - 2015/6/18
N2 - Structural topology optimization related to dynamic responses under stationary random force excitation is investigated in this paper. It is shown that the commonly used Complete Quadratic Combination method (CQC) in previous optimization work is not only computationally expensive but also results in non-convergent design pattern due to the low computing accuracy of random responses for large-scale problems. To circumvent these difficulties, an efficient and accurate optimization procedure integrating the Pseudo Excitation Method (PEM) and Mode Acceleration Method (MAM) is introduced into the dynamic topology optimization. In this framework, random responses are calculated using the PEM to ascertain a high efficiency over the CQC. More importantly, the accuracy of random responses is improved indirectly by solving the pseudo harmonic responses involved in the PEM with the help of the MAM. Numerical examples fully demonstrate the validity of the developed optimization procedure and its potential applications in practical designs.
AB - Structural topology optimization related to dynamic responses under stationary random force excitation is investigated in this paper. It is shown that the commonly used Complete Quadratic Combination method (CQC) in previous optimization work is not only computationally expensive but also results in non-convergent design pattern due to the low computing accuracy of random responses for large-scale problems. To circumvent these difficulties, an efficient and accurate optimization procedure integrating the Pseudo Excitation Method (PEM) and Mode Acceleration Method (MAM) is introduced into the dynamic topology optimization. In this framework, random responses are calculated using the PEM to ascertain a high efficiency over the CQC. More importantly, the accuracy of random responses is improved indirectly by solving the pseudo harmonic responses involved in the PEM with the help of the MAM. Numerical examples fully demonstrate the validity of the developed optimization procedure and its potential applications in practical designs.
KW - Dynamic response
KW - Mode acceleration method
KW - Pseudo excitation method
KW - Stationary random excitation
KW - Topology optimization
UR - http://www.scopus.com/inward/record.url?scp=84935838069&partnerID=8YFLogxK
U2 - 10.1016/j.compstruc.2015.05.027
DO - 10.1016/j.compstruc.2015.05.027
M3 - 文章
AN - SCOPUS:84935838069
SN - 0045-7949
VL - 158
SP - 61
EP - 70
JO - Computers and Structures
JF - Computers and Structures
ER -