The SOD Modeling Method in CAD System for Hydraulic Fracturing PSS Dseign

2015 ◽  
Author(s):  
Wei Guo ◽  
Pingyu Jiang ◽  
Yongsheng Ma
Keyword(s):  
Hydraulic Fracturing ◽  
Modeling Method ◽  
Cad System

A Haptic-Based Approach for Cable Design and Routing in Industrial Complex Products

2010 ◽  
Vol 139-141 ◽  
pp. 1356-1360 ◽  
Author(s):  
Gang Sun ◽  
Ping Jun Xia ◽  
Yuan Li ◽  
Wang Min Yi ◽  
Lei Huang
Keyword(s):  
Force Feedback ◽  
Modeling Method ◽  
Physical Models ◽  
Industrial Complex ◽  
Complex Products ◽  
Cad System ◽  
Geometry Modeling ◽  
Product Models ◽  
Physics Modeling ◽  
Fitting In

Cable design and routing is a time-consuming and costly process for industrial complex products, traditionally it is finished by experienced engineers through soft lead or aluminum wire fitting in physical models, or by automatic or semi-automatic computing method in CAD system, but both with little success. In this paper, a new haptic-based interactive method is proposed. After rigid product models are loaded from CAD system, a geometry modeling method is used to represent cable shape, a physics modeling method for calculating cable deformation, and a haptic modeling method for interaction and force feedback. In this prototyping system, the user can define cable position and path, change its shape and size, and then simulate the design and routing process with haptic to feel the touch, collision and force feedback.

A Hybrid Geometric Modeling Method for Large Scale Conformal Cellular Structures

2005 ◽  
Author(s):  
Hongqing Wang ◽  
Yong Chen ◽  
David W. Rosen
Keyword(s):  
Geometric Modeling ◽  
High Performance ◽  
Large Scale ◽  
System Modeling ◽  
Modeling Method ◽  
Truss Structures ◽  
Cellular Structures ◽  
Simple Method ◽  
Cad System ◽  
Modeling Approach

This paper presents a hybrid geometric modeling method to create CAD models of large-scale conformal cellular structures effectively and efficiently. Cellular material structures can be engineered at the mesoscopic scale for high performance and multi-functional capabilities. One type of cellular structure is conformal lightweight truss. A simple method of constructing models of uniform trusses is to pattern unit cells linearly within a CAD system. However, by orienting strut directions and adjusting strut sizes, such trusses can be optimized to achieve superior strength, stiffness, and weight characteristics. For large truss structures, computational and storage complexities cause difficulties in CAD system modeling. In this paper, a new hybrid geometric modeling approach of directly creating tessellated models is developed to automate the geometric modeling process of conformal truss structures efficiently. This modeling approach is intended to support the design, analysis, optimization, and manufacture of conformal truss structures. Examples are presented and the computational efficiency of the hybrid method is compared with the approach of creating the complete solid model of cellular structures.

Based on OOA Modeling of Gantry Crane CAD System

2013 ◽  
Vol 712-715 ◽  
pp. 1180-1184
Author(s):  
Ge Ning Xu ◽  
Jin Shuai Liu ◽  
Jun Bing Yang
Keyword(s):  
System Development ◽  
Object Oriented ◽  
Modeling Method ◽  
System Model ◽  
Gantry Crane ◽  
Cad System ◽  
Analysis Phase

In order to explore the application of the object-oriented theory in the analysis phase of the gantry crane CAD system development, the OOA modeling method is used to establish the system model and the detailed process guide and engineering strategies of modeling activities are presented, eventually a OOA model of the system is established and a foundation is lay for the subsequent OOD and OOP of the system.

Shale, Quakes, and High Stakes: Regulating Fracking-Induced Seismicity in Oklahoma, USA and Lancashire, UK

2019 ◽  
Vol 3 (1) ◽  
pp. 1-14
Author(s):  
Miriam R. Aczel ◽  
Karen E. Makuch
Keyword(s):  
United States ◽  
Hydraulic Fracturing ◽  
Shale Gas ◽  
Seismic Activity ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
High Volume ◽  
The United States ◽  
Horizontal Drilling ◽  
Induced Seismic Activity

High-volume hydraulic fracturing combined with horizontal drilling has “revolutionized” the United States’ oil and gas industry by allowing extraction of previously inaccessible oil and gas trapped in shale rock [1]. Although the United States has extracted shale gas in different states for several decades, the United Kingdom is in the early stages of developing its domestic shale gas resources, in the hopes of replicating the United States’ commercial success with the technologies [2, 3]. However, the extraction of shale gas using hydraulic fracturing and horizontal drilling poses potential risks to the environment and natural resources, human health, and communities and local livelihoods. Risks include contamination of water resources, air pollution, and induced seismic activity near shale gas operation sites. This paper examines the regulation of potential induced seismic activity in Oklahoma, USA, and Lancashire, UK, and concludes with recommendations for strengthening these protections.

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