Results 81 to 90 of about 13,201,589 (138)

Real-Time Monitoring of the Position and Orientation of a Radio Telescope Sub-Reflector with Fiber Bragg Grating Sensors

Sensors, 2019
Environmental loads linked with pointing errors, such as gravity, thermal gradients, and wind disturbances, are a serious concern for large-aperture high-frequency radio telescopes.
Yong Zhao, Jingli Du, Qian Xu, Hong Bao
doaj   +1 more source

Discrete element method to simulate continuous material by using the cohesive beam model [PDF]

, 2012
The mechanical behavior of materials is usually simulated by the continuous mechanics approach. However, simulation of non-continuous phenomena like multi fracturing is not well adapted to a continuous description.
Jean-luc Charles, CHARLES, Jean-Luc, IORDANOFF, Ivan, Damien André, Ivan Iordanoff, Jérôme Néauport, ANDRE, Damien, NEAUPORT, Jérôme, CHARLES, Jean Luc   +8 more
core   +1 more source

Using the scaled boundary finite element method to model 2D time-dependent geotechnical engineering problems [PDF]

, 2005
The scaled boundary finite element method caters well for soil-structure interaction problems, but the formulation does not cater for the presence of changing pore pressures with time, body loads and tractions. A detailed formulation is presented in this
Hassanen, M., El-Hamalawi, A.
core   +4 more sources

All-Fiber Optic Sensing for Multiparameter Monitoring and Domain-Wide Deformation Reconstruction of Aerospace Structures in Thermally Coupled Environments

Aerospace
This study introduces an all-fiber optic sensing network based on fiber Bragg grating (FBG) technology for structural health monitoring (SHM) of launch vehicle payload fairings under extreme thermo-mechanical conditions.
Zifan He, Xingguang Zhou, Jiyun Lu, Shengming Cui, Hanqi Zhang, Qi Wu, Hongfu Zuo   +6 more
doaj   +1 more source

The Inverse Finite Element Method: Sensitivity to Measurement Setup [PDF]

, 2005
Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2005.In the inverse finite element method (iFEM), given a finite element model of a structure and imperfect displacement measurements, the external loads acting on the structure can be ...
Maree, Abraham Jacobus
core  

Study on Strain Field Reconstruction Method of Long-Span Hull Box Girder Based on iFEM

Journal of Marine Science and Engineering
The box girder’s condition significantly impacts the safety and overall performance of the entire ship because it is the primary stress component of the hull construction.
Guocai Chen, Xueliang Wang, Nan Zhao, Zhentao Jiang, Fei Li, Haozheng Chen, Pengyu Wei, Tao Zhang   +7 more
doaj   +1 more source

Strain pre-extrapolation methods for shape sensing: A comparative study between modal virtual sensor expansion and smoothing element analysis

Results in Engineering
Reconstructing displacement fields from sparse strain measurements, commonly referred to as shape sensing, has become a key component in developing effective Structural Health Monitoring (SHM) systems and for enabling accurate digital twin ...
Marco Esposito
doaj   +1 more source

Multi-Objective Particle Swarm Optimization of Sensor Distribution Scheme with Consideration of the Accuracy and the Robustness for Deformation Reconstruction

Sensors, 2019
For the inverse finite element method (iFEM), an inappropriate scheme of strain senor distribution would cause severe degradation of the deformation reconstruction accuracy.
Feifei Zhao, Hong Bao, Song Xue, Qian Xu
doaj   +1 more source

Shape- and stress-sensing of a container ship by using inverse finite element method

, 2016
Dynamically tracking three-dimensional displacements and stresses of a structure by using discrete on-board strain data is known as shape- and stress-sensing.
Kefal, Adnan, Oterkus, Erkan
core   +3 more sources

Data-driven framework for extracting steady-state deformation resistance from transient experimental data without inverse finite element analysis

Advances in Industrial and Manufacturing Engineering
Accurate characterization of the steady-state deformation resistance of materials is a prerequisite for high-precision forming simulations. However, controlling the temperature and strain rate in high-temperature tensile experiments is difficult and can ...
Eiichi Ota, Minami Fujimura, Yasumoto Sato   +2 more
doaj   +1 more source