Seismic Estimation of Spatial Distribution of Subsurface Stress Field -Analysis of Shear Wave Anisotropy Caused by Non-Hydrostatic Stress Components

2020 ◽  
Author(s):  
Yusuke Watanabe ◽  
Hitoshi Mikada ◽  
Junichi Takekawa
Keyword(s):  
Spatial Distribution ◽  
Stress Field ◽  
Shear Wave ◽  
Hydrostatic Stress ◽  
Field Analysis ◽  
Stress Components ◽  
Stress Field Analysis ◽  
Subsurface Stress

Structure design of weight-on-bit self-adjusting PDC bit based on stress field analysis and experiment evaluation

2021 ◽  
Vol 196 ◽  
pp. 107692
Author(s):  
Huaigang Hu ◽  
Zhichuan Guan ◽  
Bo Zhang ◽  
Yuqiang Xu ◽  
Yongwang Liu ◽  
...  
Keyword(s):  
Stress Field ◽  
Structure Design ◽  
Field Analysis ◽  
Pdc Bit ◽  
Weight On Bit ◽  
Stress Field Analysis

scholarly journals Flow and Stress Field Analysis of Different Fluids and Blades for Fermentation Process

2014 ◽  
Vol 6 ◽  
pp. 623781
Author(s):  
Cheng-Chi Wang ◽  
Po-Jen Cheng ◽  
Kuo-Chi Liu ◽  
Ming-Yi Tsai
Keyword(s):  
Stress Field ◽  
Flow Field ◽  
Fermentation Process ◽  
Maximum Stress ◽  
Effective Means ◽  
Field Analysis ◽  
Stress Distributions ◽  
Stress Field Analysis ◽  
Inclined Angle ◽  
Key Parameter

Fermentation techniques are applied for the biotechnology and are widely used for food manufacturing, materials processing, chemical reaction, and so forth. Different fluids and types of blades in the tank for fermentation cause distinct flow and stress field distributions on the surface between fluid and blade and various flow reactions in the tank appear. This paper is mainly focused on the analysis of flow field with different fluid viscosities and also studied the stress field acting on the blades with different scales and shapes of them under specific rotational speed. The results show that the viscosity of fluid influences the flow field and stress distributions on the blades. The maximum stress that acts on the blade is increased with the increasing of viscosity. On the other hand, the ratio of blade length to width influences stress distributions on the blade. At the same time, the inclined angle of blade is also the key parameter for the consideration of design and appropriate inclined angle of blade will decrease the maximum stress. The results provide effective means of gaining insights into the flow and stress distribution of fermentation process.

The Stress Calculating and Analysis of the Second HP Turbine Disc of a Certain Type of Aeroengine

2013 ◽  
Vol 331 ◽  
pp. 176-180
Author(s):  
Ke Jun Xu ◽  
Yong Qi Wang ◽  
Yi Rui Xia ◽  
Ming Ming Jia
Keyword(s):  
Finite Element ◽  
Stress Field ◽  
Element Model ◽  
Life Assessment ◽  
Field Analysis ◽  
Finite Element Software ◽  
Turbine Disc ◽  
Stress Field Analysis ◽  
Numerical Calculation Method ◽  
Element Theory

This paper takes the 2nd HP turbine disc of an aeroengine as research object, construct its finite element model in software-Patran. According to the work environment of 2nd HP turbine disc, the boundary conditions of stress field analysis and temperature field analysis are confirmed. Based on the finite element theory of thermal analysis and structure analysis, we use finite element software-Nastran to analyze centrifugal stress and thermal stress. Numerical calculation method was used to fit the data and finally we got the thermal elastic stress field. According to the computed results, the life assessment points of disc were confirmed. The static strength of 2nd HP turbine disc was tested based on the EGD-3 criterion. All the work established the foundation for subsequent life analysis.

scholarly journals SuperMeshing: A New Deep Learning Architecture for Increasing the Mesh Density of Physical Fields in Metal Forming Numerical Simulation

2021 ◽  
pp. 1-11
Author(s):  
Qingfeng Xu ◽  
Zhenguo Nie ◽  
Handing Xu ◽  
Haosu Zhou ◽  
Hamid Reza Attar ◽  
...  
Keyword(s):  
Stress Field ◽  
Mean Squared Error ◽  
Interpolation Method ◽  
Computing Time ◽  
Absolute Error ◽  
Linear Interpolation ◽  
Field Analysis ◽  
Computational Time ◽  
Mesh Density ◽  
Stress Field Analysis

Abstract In stress field analysis, the finite element method is a crucial approach, in which the mesh-density has a significant impact on the results. High mesh density usually contributes authentic to simulation results but costs more computing resources. To eliminate this drawback, we propose a data-driven mesh-density boost model named SuperMeshingNet that uses low mesh-density as inputs, to acquire high-density stress field instantaneously, shortening computing time and cost automatically. Moreover, the Res-UNet architecture and attention mechanism are utilized, enhancing the performance of SuperMeshingNet. Compared with the baseline that applied the linear interpolation method, SuperMeshingNet achieves a prominent reduction in the mean squared error (MSE) and mean absolute error (MAE) on the test data. The well-trained model can successfully show more excellent performance than the baseline models on the multiple scaled mesh-density, including 2X, 4X, and 8X. Enhanced by SuperMeshingNet with broaden scaling of mesh density and high precision output, FEA can be accelerated with seldom computational time and cost.

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