Topology optimization for vibration suppression at multiple locations: A non-iterative approach

2021 ◽  
Vol 398 ◽  
pp. 125990
Author(s):  
Jiqiang Wang
Keyword(s):  
Topology Optimization ◽  
Vibration Suppression ◽  
Iterative Approach

scholarly journals Integrated topology optimization for vibration suppression in a vertical pump

2019 ◽  
Vol 11 (3) ◽  
pp. 168781401983268
Author(s):  
Denghao Wu ◽  
Zhibing Zhu ◽  
Yun Ren ◽  
Yunqing Gu ◽  
Jiegang Mou ◽  
...  
Keyword(s):  
Topology Optimization ◽  
Vibration Amplitude ◽  
Vibration Suppression ◽  
Low Flow ◽  
Rate Condition ◽  
Root Cause ◽  
Band Filter ◽  
Long Time ◽  
Optimized Model ◽  
Vibration Tests

This article presents a new approach aiming to reducing pump vibration by modifying its baseplate structure. The finite element models of the vertical pump were established and validated by the experimental impact test. The natural frequencies of pump were mapped in both experimental and numerical methods. The weak stiffness of the baseplate was identified as the root cause for the pump vibration. A topology optimization was used for enhancing the stiffness of baseplate and controlling its weight. The new baseplate was designed according to the inputs from optimization results and manufactured by the casting method. Both the vibration tests and the numerical simulations were carried out to investigate the vibration behaviors of the optimized pump model. The differences of vibration characteristics between original and optimized pumps were evaluated using 1/3 octave-band filter technique. Results show that the vibration was suppressed, and the resonance at 31.5 Hz was eliminated using the optimized baseplate. In particular, the maximum vibration amplitude of the vertical pump was reduced from 4.05 to 1.75 mm/s at the low flow rate condition. It was experimentally confirmed that the vibration amplitude of the optimized model complies with the requirements of the International Organization for Standardization standard and ensures the pump can operate stable for a long time.

Topology Optimization for Vibration Suppression

2018 ◽  
Vol 2018.31 (0) ◽  
pp. 291
Author(s):  
Takuma ENDO ◽  
Hiroya HOSHIBA ◽  
Junji KATO ◽  
Takashi KYOYA
Keyword(s):  
Topology Optimization ◽  
Vibration Suppression

Topology optimization of piezoelectric macro-fiber composite patches on laminated plates for vibration suppression

2018 ◽  
Vol 59 (3) ◽  
pp. 941-957 ◽  
Author(s):  
Eduardo Padoin ◽  
Ilmar F. Santos ◽  
Eduardo A. Perondi ◽  
Odair Menuzzi ◽  
Juliano F. Gonçalves
Keyword(s):  
Topology Optimization ◽  
Vibration Suppression ◽  
Fiber Composite ◽  
Laminated Plates ◽  
Macro Fiber Composite

Optimal Level Set Vibration Control of Plate Structures

2011 ◽  
Author(s):  
Masoud Ansari ◽  
Amir Khajepour ◽  
Ebrahim Esmailzadeh
Keyword(s):  
Topology Optimization ◽  
Level Set ◽  
Vibration Suppression ◽  
Optimization Method ◽  
Optimal Level ◽  
Optimum Shape ◽  
Optimization Approach ◽  
Constrained Layer Damping ◽  
Fundamental Vibration ◽  
Flexural Vibrations

This research is motivated by the need for control of flexural vibrations of lightweight plates. It addresses application of the level set method in optimal control of vibrations in plate-like structures. One of the most commonly practiced methods in control of vibration is to apply constrained layer damping patches to the surface of a structure. In order to consider the weight efficiency of the structure, the best shape and locations of the patches should be determined to achieve the optimum vibration suppression with lowest amount of damping patch. A novel topology optimization approach is proposed that is capable of finding the optimum shape and locations of the patches simultaneously. A 2D cantilever plate, undergoing flexural vibrations, will be considered. The optimal damping set will be found in the structure, such that the lowest modal energy in the fundamental vibration mode of the system is achieved. The proposed level set topology optimization method shows capability of determining the optimum damping set in structures accurately.

scholarly journals Topology Optimization of Microstructures to Reduce Structural Oscillations

2020 ◽  
Author(s):  
Georgios Stylianos Zymvragakis ◽  
Panagiotis Koutsianitis ◽  
Georgios E. Stavroulakis
Keyword(s):  
Topology Optimization ◽  
3D Printing ◽  
Band Gap ◽  
Frequency Domain ◽  
Vibration Suppression ◽  
Band Gaps ◽  
Genetic Optimization ◽  
The Waves ◽  
Optimization Of Microstructures ◽  
Printing Techniques

Vibration suppression in a field of frequencies and the creation of band gaps which do not allow the propagation of the waves is studied in this paper by means of microstructures designed through topology optimization. Topology optimization is formulated in frequency domain. Band gap design is based on Floquet-Bloch theory and genetic optimization. The result is appealing in view of modern 3D printing techniques.

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