A Multi-Frequency Topology Optimization Method for Vibro-Acoustic Problems
نویسندگان
چکیده
In practical vibro-acoustic problems, the external excitation normally contains a certain frequency band structure [1]. Therefore, it is needed to perform optimization under analysis. For sound radiation problems caused by structural vibration, topology method for materials proposed based on acoustic-vibration coupling analysis [2-6] and frequency-band matrix interpolation [7,8]. By combining advantages of FEM BEM in acoustic field analysis, accurate solution problem achieved. The material model established using solid isotropic with penalization (SIMP) method, topological sensitivity formulation derived adjoint variable (AVM). design carried out moving asymptotes (MMA). According special property impedance matrix, used obtain objective function at any point band, which improves computational efficiency optimization. zero points chebyshev polynomial are selected as nodes minimize remaining terms improving calculation accuracy. Finally, established, its effectiveness verified numerical tests. results show strong dependence multifrequency accurately represent distribution band.
منابع مشابه
Topology Optimization for Acoustic Wave Propagation Problems
The aim of this study is to develop numerical techniques for the analysis and optimization of acoustic horns for time harmonic wave propagation. An acoustic horn may be viewed as an impedance transformer, designed to give an impedance matching between the feeding waveguide and the surrounding air. When modifying the shape of the horn, the quality of this impedance matching changes, as well as t...
متن کاملsolution of security constrained unit commitment problem by a new multi-objective optimization method
چکیده-پخش بار بهینه به عنوان یکی از ابزار زیر بنایی برای تحلیل سیستم های قدرت پیچیده ،برای مدت طولانی مورد بررسی قرار گرفته است.پخش بار بهینه توابع هدف یک سیستم قدرت از جمله تابع هزینه سوخت ،آلودگی ،تلفات را بهینه می کند،و هم زمان قیود سیستم قدرت را نیز برآورده می کند.در کلی ترین حالتopf یک مساله بهینه سازی غیر خطی ،غیر محدب،مقیاس بزرگ،و ایستا می باشد که می تواند شامل متغیرهای کنترلی پیوسته و گ...
A BINARY LEVEL SET METHOD FOR STRUCTURAL TOPOLOGY OPTIMIZATION
This paper proposes an effective algorithm based on the level set method (LSM) to solve shape and topology optimization problems. Since the conventional LSM has several limitations, a binary level set method (BLSM) is used instead. In the BLSM, the level set function can only take 1 and -1 values at convergence. Thus, it is related to phase-field methods. We don’t need to solve the Hamilton-Jac...
متن کاملA FAST FUZZY-TUNED MULTI-OBJECTIVE OPTIMIZATION FOR SIZING PROBLEMS
The most recent approaches of multi-objective optimization constitute application of meta-heuristic algorithms for which, parameter tuning is still a challenge. The present work hybridizes swarm intelligence with fuzzy operators to extend crisp values of the main control parameters into especial fuzzy sets that are constructed based on a number of prescribed facts. Such parameter-less particle ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Conference on Computational & Experimental Engineering and Sciences online version
سال: 2023
ISSN: ['1933-2815']
DOI: https://doi.org/10.32604/icces.2023.09139