Numerical Simulation, Response Analysis, and Physical Experiment of Induction Logging in an Inclined Fractured Formation

2021 ◽  
pp. 1-11
Author(s):  
Zeyu Nan ◽  
Maojin Tan ◽  
Jun Li ◽  
Xiaomin Fan
Keyword(s):  
Numerical Simulation ◽  
Physical Experiment ◽  
Response Analysis ◽  
Induction Logging

Study on a straightening process by reciprocating bending for metal profiles

2021 ◽  
Vol 118 (6) ◽  
pp. 605
Author(s):  
Qingdang Meng ◽  
Gaocao Yu ◽  
Xueying Huang ◽  
Honglei Sun ◽  
Jun Zhao
Keyword(s):  
Numerical Simulation ◽  
Elastic Deformation ◽  
Quality Parameter ◽  
Area Ratio ◽  
Physical Experiment ◽  
Rectangular Section ◽  
Residual Deflection ◽  
Section Profile ◽  
Different Shapes

The straightness is a critical quality parameter of metal profiles, and straightening is a necessary process in metal profile production. Due to the limitations of the existing straightening methods, the straightening process by reciprocating bending for metal profiles is proposed. The curvature is unified by multiple reciprocating bending, and then the straightening is completed by reverse bending. The process has the advantages of high straightening efficiency, flexibility, and wide straightening range. In order to verify the feasibility of the process, numerical simulation and physical experiment are carried out with the rectangular section profile with “C” shape and “S” shape. The results show the profiles of different shapes are unified into arcs of the same size after multiple reciprocating bending. In addition, the smaller the elastic area ratio (ratio of elastic deformation to overall deformation) is, the better the effect of unification curvature is. The residual deflection is basically the same after straightening, and straightness is within 0.1%.

scholarly journals 3DOF Ultrasonic Motor with Two Piezoelectric Rings

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 834 ◽  
Author(s):  
Vytautas Jūrėnas ◽  
Gražvydas Kazokaitis ◽  
Dalius Mažeika
Keyword(s):  
Numerical Simulation ◽  
Magnetic Dipole ◽  
Attitude Control ◽  
Degrees Of Freedom ◽  
High Reliability ◽  
Experimental Studies ◽  
Main Idea ◽  
Ultrasonic Motor ◽  
Response Analysis ◽  
Magnetic Sphere

A novel design of a multiple degrees of freedom (multi-DOF) piezoelectric ultrasonic motor (USM) is presented in the paper. The main idea of the motor design is to combine the magnetic sphere type rotor and two oppositely placed ring-shaped piezoelectric actuators into one mechanism. Such a structure increases impact force and allows rotation of the sphere with higher torque. The main purpose of USM development was to design a motor for attitude control systems used in small satellites. A permanent magnetic sphere with a magnetic dipole is used for orientation and positioning when the sphere is rotated to the desired position and the magnetic field synchronizes with the Earth’s magnetic dipole. Also, the proposed motor can be installed and used for robotic systems, laser beam manipulation, etc. The system has a minimal number of components, small weight, and high reliability. Numerical simulation and experimental studies were used to verify the operating principles of the USM. Numerical simulation of a piezoelectric actuator was used to perform modal frequency and harmonic response analysis. Experimental studies were performed to measure both mechanical and electrical characteristics of the piezoelectric motor.

Numerical Simulation on Fatigue Life Assessment of Free Span for Submarine Pipeline

2015 ◽  
Vol 750 ◽  
pp. 153-159
Author(s):  
Jie Dong ◽  
Xue Dong Chen ◽  
Bing Wang ◽  
Wei He Guan ◽  
Tie Cheng Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Fatigue Life ◽  
Oil And Gas ◽  
Structural Response ◽  
Simulation Method ◽  
Life Assessment ◽  
Response Analysis ◽  
Submarine Pipeline ◽  
Fatigue Life Assessment ◽  
Harmonic Response Analysis

The upper and lower courses of sea oil and gas exploitationare connected by submarine pipeline which is called life line project. Free span often occurs because of the unevenness and scour of seabed, and fatigue is one of the main failure modes.In this paper, with the finite element numerical simulation method, based on the harmonic response analysis, the research on the structural response of free span under the vibration induced by vortex was investigated, and the effect of the factors such as flow velocity, length of free span. According to the analysis results,the fatigue life of free span was evaluated.

Numerical Simulation of Influence of Mudstone Interlayer on Compressive Strength of Salt Rock

2012 ◽  
Vol 512-515 ◽  
pp. 1953-1956
Author(s):  
Feng Shan Han ◽  
Song Li
Keyword(s):  
Numerical Simulation ◽  
Compressive Strength ◽  
Natural Gas ◽  
Radioactive Waste ◽  
Mechanical Behavior ◽  
Uniaxial Compressive Strength ◽  
Failure Process ◽  
Physical Experiment ◽  
Salt Rock ◽  
Oil And Natural Gas

Salt rock is think of ideal storage location for oil and natural gas and radioactive waste deposited, interlayer has negative effect on stability of cavern of storage for oil and natural gas and radioactive waste deposited in salt rock, It is difficult to make complete specimen layered salt rock with interlayer. In this paper Based on Rock Failure Process Analysis Code RAFP2D, influence of mudstone interlayer on uniaxial compressive strength of salt rock is investigated by numerical simulation. Numerical simulation shown that when mechanical parameters such as elastic modulus poison’s ratio and uniaxial compressive strength for salt rock and pure mudstone interlayer and content of mudstone interlayer in salt rock are known, compressive strength and mechanical behavior for salt rock with mudstone interlayer can be effectively and accurately analyzed using RFAP2D. The results for numerical simulation are agreement with true physical experiment of salt rock with mudstone interlayer. It should be noticed that the true physical experimental uniaxial compressive strength of rock is in range of 30% mean uniaxial compressive strength of rock element in RFPA2D，in this case the results for numerical simulation can reflect phenomenon and behavior for true physical experiment of salt rock with mudstone interlayer. That provides new method and avenue to analyze and investigate mechanical behavior for multilayer rock mass based on RAFP2D

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