A computational design tool was developed to perform a constrained optimization of the acoustic environment within a vibrating cylinder, incorporating FEMs and BEMs. We present a comparison of the relative performance and results obtained through the use of four different objective function and constraint formulations within the optimization tool:(1) minimize the sum of the squared acoustic pressures at a number of points within the cylinder, (2) minimize the weight of the structure with a constraint on the sum of the acoustic pressures, (3) minimize the sum of the acoustic pressures with a constraint on weight, and (4) minimize weight and summed pressures simultaneously. All four formulations were subject to upper and lower bounds on the design variables, the structural shell element thicknesses. All analyses were performed at a single excitation frequency. These formulations were implemented within the design tool and compared based on their overall pressure and weight reduction and computational efficiency. Two different cylinder models were used to evaluate the optimization formulations. (Author) Page 1 Downloaded by KUNGLIGA TEKNISKA HOGSKOLEN KTH on August 17, 2015 | http://arc.aiaa.org | AbstractA computational design tool was developed to perform a constrained optimization of the acoustic environment within a vibrating cylinder, incorporating finite element and boundary element methods. This paper presents a comparison of the relative performance and results obtained through the use of four different objective function and constraint formulations within the optimization tool: 1) minimize the sum of the squared acoustic pressures at a number of points within the cylinder, 2) minimize the weight of the structure with a constraint on the sum of the acoustic pressures, 3) minimize the sum of the acoustic pressures with a constraint on weight, 4) minimize weight and summed pressures simultaneously. All four formulations were subject to upper and lower bounds on the design variables, the structural shell element thicknesses. All analyses were performed at a single excitation frequency. These formulations were implemented within the design tool and compared based on their overall pressure and weight reduction and computational efficiency. Two different cylinder models were used to evaluate the optimization formulations. It was found that the third formulation was the most reliable and effective. In addition, a nearly linear relationship was observed between the relative optimal decibel noise level within the cylinder and the optimal cylinder weight. IntroductionWe present here an evaluation of the behavior and computational performance of four different objective and constraint formulations, implemented within a computational design tool, for the optimization of the skin thickness distribution of unstiffened cylinder models. The desired goals of the optimization are related to the structural weight and interior noise environment of the cylinder models. The cylinders are considered to be excited by an external no...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.