New-Type Energy-Recovering Hydraulic Workover Rig and the Simulation for Lifting the Tubing String

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Zhang Lujun ◽  
Xie Hengshu
Keyword(s):  
Potential Energy ◽  
Simulation Analysis ◽  
Basic Structure ◽  
Dynamics Model ◽  
Actual Measurement ◽  
Model And Simulation ◽  
Measurement Results ◽  
Tubing String ◽  
New Type ◽  
Simulation Results

A new-type energy-recovering hydraulic workover rig is researched. The basic structure and working theory of this rig are introduced. This rig decreases its equipped power remarkably compared with the conventional rig, and can recover the potential energy released by the tubing string when lowered. With infinite force-grade number, this rig can obtain the maximum lifting efficiency and energy-recovering rate. The dynamics model of lifting the tubing string is deduced and a simulation analysis is conducted. Through simulation some conclusions are obtained: (1) the greater the throttle valve path area the higher the tubing string lifting velocity, (2) the lighter the tubing string the higher the tubing string lifting velocity, and (3) the greater the displacement of the variable pump motor the higher the tubing string lifting velocity. The actual measurement results prove that the dynamics model and simulation results are basically right.

Study on Hydraulic Energy-Recovering Workover Rig and the Simulation for Lifting the Pipestring

2006 ◽  
Vol 129 (2) ◽  
pp. 96-101 ◽  
Author(s):  
Zhang Lujun
Keyword(s):  
Mathematical Model ◽  
Potential Energy ◽  
Energy Saving ◽  
Simulation Analysis ◽  
Actual Measurement ◽  
Measurement Results ◽  
Vessel Volume ◽  
Simulation Results ◽  
The Mathematical Model ◽  
Special Working

In this paper, an advanced energy-saving petroleum machinery, the hydraulic energy-recovering workover rig, is researched. The equipped power of this rig is only one third of an ordinary rig, and this rig can also recover and reuse the potential energy which is released by the pipestring when lowered. The special working theory of this rig is introduced. An energy-saving analysis is conducted. Analysis shows that when lowering the pipestring which weighs 260kN, the energy recovered by this rig is about 240×106J. The mathematical model of lifting the pipestring is established and a simulation analysis is conducted. Through simulation, some conclusions are obtained: (1) the lighter the pipestring the shorter the pipestring lifting time; (2) the smaller the throttle valve path area the longer the pipestring lifting time; (3) the smaller the air vessel volume the shorter the pipestring lifting time. The actual measurement results prove that the simulation results are right.

Study on Impact Properties of New Hydro-Pneumatic Buffer for a Metro Vehicle

2014 ◽  
Vol 978 ◽  
pp. 94-100
Author(s):  
Yi Ping Li
Keyword(s):  
Buffer Capacity ◽  
Characteristic Curve ◽  
Simulation Method ◽  
Static Characteristic ◽  
Railway Vehicle ◽  
Longitudinal Impact ◽  
Dynamics Model ◽  
New Type ◽  
Simulation Results ◽  
Buffer Structure

Analyzed and studied the hydro-pneumatic buffer structure of railway vehicle, designed a new type of hydro-pneumatic buffer and established the detailed dynamics model. Calculated the static characteristic curve of hydro-pneumatic buffer with different compression rate and dynamic characteristic curve with different impact speed through the numerical simulation method. The simulation results shows that the biggest impedance force is 1836.3KN and buffer capacity reach 221.89KJ when impact velocity of the new hydro-pneumatic buffer is 5m/s.New hydro-pneumatic buffer can improve the speed of manipulating vehicle, reduce the longitudinal impact and vibration in the train and adapt to the needs of the trains.

Simulation Analysis of Walking and Climbing Robot Based on ADAMS

2013 ◽  
Vol 721 ◽  
pp. 433-436
Author(s):  
Dong Mei Liu ◽  
Hang Xu Yang
Keyword(s):  
Simulation Analysis ◽  
Robot Motion ◽  
Mechanical Equipment ◽  
Mountainous Area ◽  
Climbing Robot ◽  
Complex Environment ◽  
Motion Process ◽  
New Type ◽  
Simulation Results ◽  
Working Efficiency

At present, it is mostly the wheel or caterpillar of large mechanical equipment to finish the transportation operation in the mountainous area and forest complex environment. These large machines have some shortcomings, such as power consumption, poor mobility, low working efficiency and their own shortcoming of balance and the barrier and grade ability. In order to solve the above problems, this paper designed a new type of walking climbing robot and built virtual prototype of the robot by using PRO/E, did simulation of the robot motion process and the simulation results verified the feasibility of the design.

Dynamic Analysis Helicopter Flight Simulator

2014 ◽  
Vol 543-547 ◽  
pp. 1305-1308
Author(s):  
Xiao Feng Liu ◽  
Jing Wei Yu ◽  
Hai Tao Wang ◽  
Zhao Wen Fang
Keyword(s):  
Kinetic Model ◽  
Dynamic Analysis ◽  
Simulation Analysis ◽  
Structural Characteristics ◽  
Reference Value ◽  
Simulation System ◽  
Flight Simulator ◽  
Dynamics Model ◽  
Helicopter Flight ◽  
Simulation Results

For helicopter structural characteristics, this article focuses on the helicopter to take off, hover and other state aerodynamic analysis, the establishment of the fuselage-landing gear dynamics model; while the helicopter simulator simulation system are described, and the kinetic model was built simulation analysis, simulation results and the actual flight conditions consistent, indicating that the model is correct, there is a certain reference value.

Analysis of Influence of the Roller Number and Rolling Schedule to Straighten Quality of the Project Steel Bar

2013 ◽  
Vol 437 ◽  
pp. 590-596
Author(s):  
Xi Jian Zheng ◽  
Lei Ma ◽  
Yu Fei Zhu
Keyword(s):  
Reference Value ◽  
System Dynamics Model ◽  
Dynamics Model ◽  
Rolling Schedule ◽  
Actual Measurement ◽  
Steel Bar ◽  
Simulation Results ◽  
Two Parameters ◽  
Domestic Manufacturer

Roll number and rolling schedule are the important parameters affecting the quality of steel bar straightening，when domestic manufacturer design the straightening equipment, these two parameters design basic is by analogy, so it is necessary to study these two parameters. This paper calculated the straightening roller to obtain reasonable roll number; next step quantitative calculate to obtains the theory rolling schedule, in the meantime actual measurement to obtains the practical rolling schedule of the same equipment；then based on rigid-flexible virtual prototype technology to build straightening system dynamics model. At the theory rolling schedule, and the practical rolling schedule for steel bar straighten emulation, obtained straightness and deviation of different diameter steel bar after straightening. By comparison and analysis the simulation results, we obtain the reasonable roll number and rolling schedule. In this paper, this method have reference value to design the roll number and rolling schedule for similar straightening equipment.

scholarly journals Kinematics and dynamics analysis of a new-type friction stir welding robot and its simulation

2019 ◽  
Vol 11 (7) ◽  
pp. 168781401986651
Author(s):  
Haitao Luo ◽  
Jia Fu ◽  
Lichuang Jiao ◽  
Guangming Liu ◽  
Changshuai Yu ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Simulation Analysis ◽  
Kinematics And Dynamics ◽  
Welding Robot ◽  
Dynamics Model ◽  
Welding Condition ◽  
Friction Stir ◽  
Theoretical Support ◽  
Characteristics Analysis ◽  
New Type

The mechanical configuration, structural composition, and five typical working conditions of a newly developed friction stir welding robot are introduced. The kinematics model of the friction stir welding robot is established and the forward kinematics equations, inverse kinematics equations, and the Jacobian matrix are solved. In addition, the dynamics model of the friction stir welding robot is also built by using the Lagrange method. The centroid position coordinate and inertia matrix of each part are obtained. Finally, the dynamic equation of friction stir welding robot is determined. According to the kinematics and dynamics model of robots, simulation analysis for friction stir welding robot based on virtual prototyping technology was carried out. The trajectory equation of the weld joint under the condition of melon petal welding is established, the spline trajectory is fitted by many discrete points measured by the contact probe, and the trajectory planning of each joint and the changing laws of motion parameters under the friction stir welding robot melon petal welding condition are obtained. The movement laws and the loading conditions of each joint can be better controlled by designers, and provide solid theoretical support for the static and dynamic characteristics analysis and structural optimization of the friction stir welding robot.

scholarly journals Coplanar wave guide fed fork shaped frequency reconfigurable antenna for LTE, WI-FI and WLAN applications

2017 ◽  
Vol 7 (1.1) ◽  
pp. 366
Author(s):  
B Siva Prasad ◽  
P Mallikarjuna Rao ◽  
B T P Madhav
Keyword(s):  
Impedance Matching ◽  
Ground Plane ◽  
Basic Structure ◽  
Wave Guide ◽  
Reconfigurable Antenna ◽  
Pin Diodes ◽  
Feed Line ◽  
Measurement Results ◽  
Simulation Results ◽  
Antenna Model

A coplanar wave guide fed fork shaped antenna is designed with reconfigurability for switching between the application bands of LTE, Wi-Fi and WLAN. A novel closed hut shaped ground plane structure is used in the construction of the antenna model for good impedance matching with the feed line. The basic structure of the antenna model is working in the UWB range from 3.1 to 10.6 GHz. The adjacent strips of the monopole consisting of the slots for the placement of PIN diodes. The switching operation of the diodes providing frequency reconfigurability nature in the antenna between LTE (2.1-2.2 GHz), Wi-Fi (2.4 to 2.7 GHz) and WLAN (5.6-5.8 GHz) bands. Antenna is providing peak realized gain of 4.5 dB and efficiency more than 70% in the operating bands. The prototyped antenna is providing excellent measurement results in correlation with simulation results obtained from CST Microwave Studio.

A New Type of IGBT Device with Electronic Enhance Collector

2014 ◽  
Vol 644-650 ◽  
pp. 3844-3849
Author(s):  
Yu Shu Lai ◽  
Yan Xiong ◽  
Sheng Rong Zhong ◽  
Jian Xiong
Keyword(s):  
Simulation Analysis ◽  
Structural Parameters ◽  
Substrate Structure ◽  
New Type ◽  
Working Principle ◽  
Groove Structure ◽  
Simulation Results

A new type of substrate structure Electronic Enhance Collector IGBT (EEC-IGBT) was proposed, and the working principle was introduced in this paper. Compared with conventional IGBT, the substrate of EEC-IGBT was divided by the groove structure composed of oxide and aluminum. Finally, simulation analysis about the EEC-IGBT performance influence by structural parameters was given. The simulation results showed that the turn-off loss of EEC-IGBT was reduced 30% compared with CS-IGBT in the same condition voltage.

scholarly journals Structural Design and Dynamics Simulation Analysis of A Certain Type of Co-frame Launcher

2021 ◽  
Vol 2125 (1) ◽  
pp. 012037
Author(s):  
Hanchao Liu ◽  
Anxin Guo ◽  
Xuezhi Wang
Keyword(s):  
Dynamic Response ◽  
3D Modeling ◽  
Structural Design ◽  
Simulation Analysis ◽  
Dynamics Simulation ◽  
Dynamic Parameters ◽  
Dynamics Model ◽  
Modeling Software ◽  
Design Requirements ◽  
Simulation Results

Abstract To study the dynamic response of a certain type of co-frame launcher during launch, this article uses the 3D modeling software Pro/E to import the model into Adams from the perspective of launch dynamics. the launch dynamics model of the shared-frame launcher is established. We apply the ejection thrust of the two types of missiles to the corresponding ejection devices and measure and collect the dynamic parameters of the cartridge system. The simulation results show that the dynamic parameters of the A and B missiles are in line with the available overload design requirements. The B-type missiles are superior to the A-type missiles in terms of ballistic orbit contact force and ejection attitude.

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