|
|
|
|
|
Xiong Wang, Wei Liu, Jifeng Ding, Yi Sun and Yongbing Dang
The initiating explosive shock environment of an aerospace mission has the characteristics of instantaneity, high amplitude and a wide frequency domain. An improved method based on the acceleration frequency response function (FRF) and virtual mode synth...
ver más
|
|
|
|
|
|
|
|
|
|
|
Kamalaselvan Arunachalam, Balasubramanian Madanmohan, Rajesh Rajamani, Natarajan Prabaharan, Hassan Haes Alhelou and Pierluigi Siano
The Frequency Response Analysis approach (FRA) is useful in the fault diagnosis of transformers. However, its usefulness in diagnosing any potential sources of Partial Discharge (PD) in transformers has not been thoroughly investigated so far. In this wo...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yaxuan Su, Xiaohui Lin, Rui Huang and Zhidong Zhou
With the attention focused on harvesting energy from the ambient environment for nanoscale electronic devices, electromechanical coupling effects in materials have been studied for many potential applications. Flexoelectricity can be observed in all diel...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ivan Pavlenko, Justyna Trojanowska, Oleksandr Gusak, Vitalii Ivanov, Jan Pitel, Vita Pavlenko
Pág. 52 - 56
The permanent increase of operating parameters of modern multistage centrifugal pumps requires more precise modelling for estimation their dynamic reliability and needs to develop new approach and methodology for the related calculations. It is necessary...
ver más
|
|
|
|
|
|
|
|
|
|
|
Jiri Petrzela
The proposed constant phase elements are very accurate over audio frequency bandwidth and can be directly utilized in popular and emerging research discipline: design of fractional-order analog building blocks.
|
|
|
|
|
|
|
|
|
|
|
Alvaro Magdaleno, Cesar Pelaez, Alvaro Iglesias-Pordomingo and Antolin Lorenzana
Tuned Mass Dampers are devices which can be assimilated to single-degree-of-freedom systems with a certain amount of moving mass, a natural frequency and a damping ratio intended to be installed on lively structures to reduce the contribution of a certai...
ver más
|
|
|
|
|
|
|
|
|
|
|
Jilin Hou, Sijie Wang, Qingxia Zhang and Lukasz Jankowski
Damage identification based on modal parameters is an important approach in structural health monitoring (SHM). Generally, traditional objective functions used for damage identification minimize the mismatch between measured modal parameters and the para...
ver más
|
|
|
|
|
|
|
|
|
|
|
Feng Gao and Wei Sun
This paper develops a damping strategy for the vibration reduction of a mistuned bladed disk (blisk) by depositing hard coating on its blades, and systematically investigates the vibration characteristics of the hard-coated mistuned (HCM) blisk. By using...
ver más
|
|
|
|
|
|
|
|
|
|
|
Andres Gallego, Francisco Roman and Edwin Pineda
In this paper, we obtain the Complex Natural Resonances of an object from the backscattered response in the frequency domain with a novel rational function approximation method based on both Vector Fitting and Cauchy methods. We determine the system orde...
ver más
|
|
|
|
|
|
|
|
|
|
|
Claudia Aristizábal, Pierre-Yves Bard, Céline Beauval and Juan Camilo Gómez
The integration of site effects into Probabilistic Seismic Hazard Assessment (PSHA) is still an open issue within the seismic hazard community. Several approaches have been proposed varying from deterministic to fully probabilistic, through hybrid (proba...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yuantian Qin, Yucheng Zhang, Vadim Silberschmidt and Luping Zhang
The location identification of dynamic load is an important part of load-identification technology. Traditional methods are mostly aimed at the identification of dynamic load?s amplitude and phase. A new method for dynamic load location identification is...
ver más
|
|
|
|
|
|
|
|
|
|
|
Éva Salamon-Albert, Péter Lorincz, Gábor Pauler, Dénes Bartha and Ferenc Horváth
In order to develop adequate adaptation measures for environmental vulnerability, we need detailed knowledge on the climatic performance of forest ecosystems. In this study, we aim to explore climate function variability of lowland beech forest distribut...
ver más
|
|
|
|
|
|
|
|
|
|
|
Qi Hong, Tianyi Zhou and Junde Qi
Polishing force is one of the key process parameters in the polishing process of blisk blades, and its control accuracy will affect the surface quality and processing accuracy of the workpiece. The contact mechanism between the polishing surface and flap...
ver más
|
|
|
|
|
|
|
|
|
|
|
Fanhao Meng, Yong Ma, Yongjun Xia, Yimin Ma and Ming Jiang
This paper investigates system identification algorithms for modal identification of frame structures, such as a suspension bridge and an overhead transmission line-crossing frame, using ambient vibration measurements. The modal identification procedures...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alessandro Zanarini
Spatially dense operative deflection shapes and receptances, acquired in broad frequency bands, increase the detail in the spatial and frequency domains of the responses of parts in actual dynamic loading, manufacturing and mounting conditions. This work...
ver más
|
|
|
|
|
|
|
|
|
|
|
Pengfei Xing, Lixun Lu, Guobin Li, Xin Wang, Honglin Gao, Yuchao Song and Hongpeng Zhang
In order to identify the natural frequency of ship propulsion shafting under the running condition, a multi-method approach that combines Duffing Oscillator, harmonic wavelet packet transform, and probability density function is proposed. An experimental...
ver más
|
|
|
|
|
|
|
|
|
|
|
Bilal Asad, Toomas Vaimann, Anouar Belahcen, Ants Kallaste, Anton Rassõlkin, Payam Shams Ghafarokhi and Karolina Kudelina
This paper presents the modeling and the broken rotor bar fault diagnostics by time?frequency analysis of the motor current under an extended startup transient time. The transient current-based nonstationary signal is retrieved and investigated for its t...
ver más
|
|
|
|
|
|
|
|
|
|
|
Enrico Armentani, Venanzio Giannella, Roberto Citarella, Antonio Parente and Mauro Pirelli
In this work, the vibration behavior of a 4-cylinder, 4-stroke, petrol engine was simulated by leveraging on the Finite Element Method (FEM). A reduced modelling strategy based on the component mode synthesis (CMS) was adopted to reduce the size of the f...
ver más
|
|
|
|
|
|
|
|
|
|
|
Denes Farago, Zoltan Dombovari
Pág. 91 - 99
The basic behavior of free vibratory nonlinear system is investigated in this work. The main approach was to reveal the order of fitting necessary to properly approximate the actual behavior of a nonlinear mechanical system. Tests were performed in an ex...
ver más
|
|
|
|
|
|
|
|
|
|
|
Gunther Steenackers, Jeroen Peeters, Simon Verspeek and Bart Ribbens
Carbon fiber bicycle frames are complex-shaped structures and are prone to delaminations and difficult to inspect. The use of finite element model updating is common in structural dynamics but not so common in active thermography inspection. However, the...
ver más
|
|
|
|
|
|