A Theoretical Model for Dynamic Performance Prediction of Air-Foam Flooding in Heterogeneous Reservoirs

2016 ◽  
Author(s):  
Jun Yang ◽  
Xiangzeng Wang ◽  
Shubao Wang ◽  
Ruimin Gao ◽  
Yizhong Zhang ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Performance Prediction ◽  
Dynamic Performance ◽  
Heterogeneous Reservoirs ◽  
Foam Flooding

A Theoretical Model for Dynamic Performance Prediction of Air-Foam Flooding in Heterogeneous Reservoirs

2016 ◽  
Author(s):  
Jun Yang ◽  
Xiangzeng Wang ◽  
Shubao Wang ◽  
Ruimin Gao ◽  
Yizhong Zhang ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Performance Prediction ◽  
Dynamic Performance ◽  
Heterogeneous Reservoirs ◽  
Foam Flooding

Sizing and Dynamic Performance Prediction Tools for 20 K Hydrogen Sorption Cryocoolers

2002 ◽  
pp. 541-549 ◽  
Author(s):  
P. Bhandari ◽  
M. Prina ◽  
M. Ahart ◽  
R. C. Bowman ◽  
L. A. Wade
Keyword(s):  
Performance Prediction ◽  
Dynamic Performance ◽  
Hydrogen Sorption ◽  
Prediction Tools

scholarly journals Effect of Processing Parameters on the Dynamic Characteristic of Material Extrusion Additive Manufacturing Plates

2019 ◽  
Vol 9 (24) ◽  
pp. 5345
Author(s):  
Shijie Jiang ◽  
Yinfang Shi ◽  
Yannick Siyajeu ◽  
Ming Zhan ◽  
Chunyu Zhao ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Theoretical Model ◽  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Experimental Tests ◽  
Processing Parameters ◽  
Combination Method ◽  
Mode Shapes ◽  
Material Extrusion ◽  
Function Combination

Material extrusion (ME), an additive manufacturing technique, can fabricate parts almost without geometrical limitations. With the growing application of ME parts, especially in actual working conditions, the dynamic characteristics are needed to be studied to accurately determine their reliability. This study provides an experimental validation of the theoretical model for predicting the dynamic characteristics of ME plates fabricated with three different key processing parameters, i.e., extrusion width, layer height and build direction. The model is set up based on the bidirectional beam function combination method, and a series of experimental tests are performed. It is found that different processing parameters result in the material properties of the samples to vary, thus leading to different dynamic characteristics. Through the comparison between predictions and measurements, it is shown that the influencing trend of the processing parameters is predicted precisely. The theoretical model gives reliable predictions in dynamic characteristics of ME plates. The natural frequency discrepancy is below 13.4%, and the predicted mode shapes are the same as the measured ones. This present work provides theoretical basis and technical support for further research in improving the dynamic performance of ME products, and helps extend the applications of this technique.

Hydraulic Driven Rotating Flexible Beam: Theoretical Modal Analysis and Proportional Servo Drive Parameter Influence

2003 ◽  
Author(s):  
Javier Freire ◽  
Esteve Codina ◽  
Munir Khamashta
Keyword(s):  
Theoretical Model ◽  
Modal Analysis ◽  
Dynamic Performance ◽  
Normal Modes ◽  
Flexible Beam ◽  
Servo Drive ◽  
Analysis Methodology ◽  
Model Predictions ◽  
Hydraulic Servo ◽  
Machine Elements

Understanding the behavior of system with flexible elements is increasingly important in modern day technology. Reducing the mass of machine elements leads to a remarkable improvement in dynamic performance. However, a loss of precision also occurs with such an increase in flexibility. In order to arrive at a better understanding of systems with flexible elements, we are investigating the particular behavior of a hydraulic servo driven rotating flexible beam with the aim of obtaining a methodology that could be applied to a real application. To investigate this behavior, a set of models has been developed. In this paper, a theoretical model, using classical modal analysis methodology, is presented. The flexible beam is modeled in a standard way and the hydraulic servo drive is modeled as a boundary condition. Only normal modes will be investigated. This approach allows considering the servo proportional constant and the cylinder mass. It will be show that the servo proportional constant has low influence in the system eigen frequencies. The theoretical model predictions are validated experimentally.

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