Flapping-Wing Fluid–Structural Interaction Analysis Using Corotational Triangular Planar Structural Element

AIAA Journal ◽  
2016 ◽  
Vol 54 (8) ◽  
pp. 2265-2276 ◽  
Author(s):  
Haeseong Cho ◽  
JunYoung Kwak ◽  
SangJoon Shin ◽  
Namhun Lee ◽  
Seungsoo Lee
Keyword(s):  
Interaction Analysis ◽  
Flapping Wing ◽  
Structural Element ◽  
Structural Interaction

scholarly journals Thermal Effect on Structural Interaction between Energy Pile and Its Host Soil

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Qingwen Li ◽  
Lu Chen ◽  
Lan Qiao
Keyword(s):  
Thermal Stresses ◽  
Heat Transfer Process ◽  
Structural Element ◽  
Energy Pile ◽  
Structural Interaction ◽  
Comprehensive Method ◽  
Green Power ◽  
Energy Piles ◽  
Distribution Of Stress ◽  
Peak Value

Energy pile is one of the promising areas in the burgeoning green power technology; it is gradually gaining attention and will have wide applications in the future. Because of its specific structure, the energy pile has the functions of both a structural element and a heat exchanger. However, most researchers have been paying attention to only the heat transfer process and its efficiency. Very few studies have been done on the structural interaction between the energy pile and its host soil. As the behavior of the host soil is complicated and uncertain, thermal stresses appear with inhomogeneous distribution along the pile, and the peak value and distribution of stress will be affected by the thermal and physical properties and thermal conductivities of the structure and the host soil. In view of the above, it is important to determine thermal-mechanical coupled behavior under these conditions. In this study, a comprehensive method using theoretical derivations and numerical simulation was adopted to analyze the structural interaction between the energy pile and its host soil. The results of this study could provide technical guidance for the construction of energy piles.

Fluid-Structure Interaction Analysis for Resonance Investigation of Pump-Turbine Runner

2015 ◽  
Author(s):  
Sadao Kurosawa ◽  
Kiyoshi Matsumoto ◽  
Junpei Miyagi ◽  
Lingyan He ◽  
Zhengwei Wang
Keyword(s):  
Dynamic Stress ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Forced Response ◽  
Structural Deformation ◽  
Analysis Method ◽  
Pump Turbine ◽  
Fluid Structure ◽  
Structural Interaction ◽  
Structure Interaction

In the development of high head pumped storage projects, one of the critical problems is the strength of pump-turbine runners. In this paper, the analysis method of forced response of the runner structure is presented and the prediction accuracy is validated by comparing with the results of the prototype head model test. And the application results for resonance of pump-turbine startup process are shown. Basically it is necessary for the prediction of the runner dynamic stress to use a combined approach of fluid dynamics and structural dynamics. Due to the high complexity of the phenomena and the limitation of computer power, the numerical simulation for the fluid-structural interaction phenomena was in the past too expensive and not feasible. However, due to consideration that vibration displacement is very small, such complex analysis has been handled as one-way fluid-structural interaction problem. Namely the excitation force is calculated by whole passage flow analysis that is ignored the structural deformation and takes into account the rotor-stator interaction effect. And the dynamic stress of runner is calculated by the transient response analysis taken account into the added mass effect of surrounding water using an acoustic fluid formulation. Due to such a simplification, it has been possible to evaluate the runner dynamic stress in a short time. As a result, it was confirmed that the dynamic behavior such as runner vibration and pressure fluctuation under turbine operating range and the runner stress can be analyzed with the sufficient accuracy and due to applying as standard procedure in TOSHIBA, it can be avoided a failure risk in an early design phase. Moreover the fluid-structure interaction analysis method in this paper can be easily adapted to apply for other type of turbines, such as Francis turbines and Kaplan turbines.

scholarly journals Combined co-rotational beam/shell elements for fluid–structure interaction analysis of insect-like flapping wing

2019 ◽  
Vol 97 (1) ◽  
pp. 203-224 ◽  
Author(s):  
Haeseong Cho ◽  
DuHyun Gong ◽  
Namhun Lee ◽  
SangJoon Shin ◽  
Seungsoo Lee
Keyword(s):  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Flapping Wing ◽  
Fluid Structure ◽  
Shell Elements ◽  
Structure Interaction
Sign in / Sign up

Export Citation Format

Share Document