scholarly journals Simulation analysis of asynchronous induction type coil gun armature structure parameters

2021 ◽  
Vol 1939 (1) ◽  
pp. 012050
Author(s):  
Pengxiang Zhang ◽  
Tao Shu ◽  
Jianming Shi
Keyword(s):  
Simulation Analysis ◽  
Structure Parameters ◽  
Induction Type

scholarly journals Design and Optimization of Strength type Negative Pressure Suction Force Pluck Port based on Tesla Valve

2021 ◽  
Author(s):  
Zijie Niu ◽  
XU Shengming ◽  
JIANG jiangang ◽  
ZHANG Jun
Keyword(s):  
Negative Pressure ◽  
Simulation Analysis ◽  
Flow Speed ◽  
Air Pressure ◽  
Maximum Pressure ◽  
Structure Parameters ◽  
Strengthening Effect ◽  
Suction Force ◽  
Pressure Suction ◽  
Tesla Valve

Abstract An apple pluck port based on negative pressure suction force can realize contactless apple plucking and also reduce possible damage to the apple. Accordingly, in this study, a strength type pneumatic pluck port was designed on the basis of a Tesla valve. First, a low air pressure block for mechanization of the Tesla valve structure at the intersection between the main and curved air passageway was theoretically modelled and analyzed. Then, the air pressure and the flow speed distribution were analyzed for three different types of structure parameters under various distances of the Tesla pluck port from the apple; on the basis of a fluent simulation, the maximum pressure difference at both sides of the apple was also simulated. Finally, the structure parameters under an optimal negative pressure field according to the simulation analysis were proposed, and a manufactured experimental test was conducted to compare the results with the simulation. The simulation and experimental data prove that when the included angle between the main and curved air passageway of the Tesla pluck port is lower than 45°, the low air pressure block at the intersection between the main and curved air passageway of the Tesla valve affects the flow of the pluck port and extends the length of the low air pressure block. The Tesla pluck port guarantees a flow in the pipe when the pipe port diameter is 10–15 mm larger than the apple diameter, ensuring the negative strengthening effect of the Tesla pluck port. The experiment proves that the Tesla pluck port designed in this study exhibits a better negative pressure strengthening effect than that achieved via previously existing methods, which can strengthen the plucking effect.

Design and Simulation Analysis of Hydraulic Torque-Loading Device for Sintering Machine

2010 ◽  
Vol 156-157 ◽  
pp. 700-703
Author(s):  
Su Bo Ren ◽  
Ming Hua Bai
Keyword(s):  
Simulation Analysis ◽  
Mechanical Analysis ◽  
New Method ◽  
Structure Parameters ◽  
Air Leakage ◽  
Sintering Machine ◽  
Vibration Problem ◽  
Loading Device ◽  
Design Requirements

In order to solve arching and air leakage problems of sintering machine, based on the mechanical analysis to arching phenomenon, the hydraulic torque-loading device was designed, the simulation to the device was made using AMESim software, finds the reasons that system generating vibration and noise when running. By adjusting the structure parameters of hydraulic components, adding accumulator and damping system, solve the vibration problem of the system effectively, and can run smoothly in accordance with design requirements, the research provides a new method for solving arching and air leakage problems.

Simulation Analysis of Seed Metering Procedure in Scoop Metering Device Based on Discrete Element Method

2012 ◽  
Vol 157-158 ◽  
pp. 550-557 ◽  
Author(s):  
Yu Jie Ji ◽  
Hong Da Xue ◽  
Cheng Hua Li
Keyword(s):  
Discrete Element Method ◽  
Simulation Analysis ◽  
Discrete Element ◽  
Design Parameters ◽  
Structure Parameters ◽  
Key Factor ◽  
Seed Metering Device ◽  
Element Method

Seed metering procedure of metering device was a key factor to affect performance of precision seed metering device. Based on analysis of seed holding volume of metering scoop, relationship between the seed holding volume and structure parameters of the metering scoop was established, and beginning and ending angles of seed clearing during the seed metering procedure were determined. Simulation analysis of seed metering procedure with different parameters of the metering device was carried out by mean of discrete element method to identify the influences of metering scoop parameters on the performance the metering device, and suitable range of structure parameters of the metering scoop were investigated. Finally, the reasonability of design parameters of the metering scoop for experiment usage was verified.

Dynamic Simulation Analysis of Gatling Gun Based on Virtual Proto Model

2012 ◽  
Vol 479-481 ◽  
pp. 748-751
Author(s):  
Tao Li ◽  
Rui Lin Wang ◽  
Lin Hua Liu
Keyword(s):  
Experimental Data ◽  
Structural Optimization ◽  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Angular Displacement ◽  
Virtual Prototype ◽  
Rigid Bodies ◽  
Displacement Velocity ◽  
Structure Parameters ◽  
Solid Works

Description of the dynamic characters of the main parts of pistol is necessary. On the basis of analyzing the motions and forces of every part of some Gatling gun, a 63-degree-of-freedom virtual prototype composed by 101 rigid bodies is established by means of Solid Works and ADAMS. The validation is made and the credibility of the virtual prototype is approved by compared to the simulation result and the experimental data of the barrel Angular displacement, velocity and displacement of bolt frame. The dynamic simulation analysis of automata is produced. Moreover, the influence of some structure parameters on the dynamic characters of the main parts is studied by simulation, which has laid the foundation for further simulation and structural optimization

scholarly journals Local Structure Parameters of Temperature and Humidity in the Entrainment-Drying Convective Boundary Layer: A Large-Eddy Simulation Analysis

2011 ◽  
Vol 50 (2) ◽  
pp. 472-481 ◽  
Author(s):  
Sylvain Cheinet ◽  
Pierre Cumin
Keyword(s):  
Boundary Layer ◽  
Large Eddy Simulation ◽  
Vertical Velocity ◽  
Convective Boundary Layer ◽  
Simulation Analysis ◽  
Potential Temperature ◽  
Structure Parameters ◽  
Convective Boundary ◽  
Eddy Simulation ◽  
Large Eddy

Abstract Many wave propagation applications depend on the local, instantaneous structure parameters of humidity and of potential temperature . This study uses a large-eddy simulation to explore and compare the variability of and in the shearless, entrainment-drying convective boundary layer (CBL). The predicted horizontal mean profiles of these quantities are shown to agree with corresponding observations. The results in the bulk CBL suggest that the largest occur in the entrained tropospheric air whereas the largest are within the convective plumes. There are distinct correlations between the vertical velocity and and between the vertical velocity and . It is shown that these correlations can significantly contribute to the mean vertical velocity biases measured from radars and sodars. A physical interpretation for these contributions is offered in terms of the CBL dynamics.

scholarly journals Simulation Analysis of the Influence of Nozzle Structure Parameters on Material Controllability

Micromachines ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 826
Author(s):  
Huanbao Liu ◽  
Guangming Zheng ◽  
Xiang Cheng ◽  
Xianhai Yang ◽  
Guangxi Zhao
Keyword(s):  
3D Printing ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Structure Parameters ◽  
Element Analysis ◽  
Ansys Fluent ◽  
Organ Regeneration ◽  
Orthogonal Experiments ◽  
Influence Degree ◽  
Nozzle Structure

With the evolution of three-dimensional (3D) printing, many restrictive factors of 3D printing have been explored to upgrade the feasibility of 3D printing technology, such as nozzle structure, print resolution, cell viability, etc., which has attracted extensive attention due to its possibility of curing disease in tissue engineering and organ regeneration. In this paper, we have developed a novel nozzle for 3D printing, numerical simulation, and finite element analysis have been used to optimize the nozzle structure and further clarified the influence of nozzle structure parameters on material controllability. Using novel nozzle structure, we firstly adopt ANSYS-FLUENT to analyze material controllability under the different inner cavity diameter, outer cavity diameter and lead length. Secondly, the orthogonal experiments with the novel nozzle are carried out in order to verify the influence law of inner cavity diameter, outer cavity diameter, and lead length under all sorts of conditions. The experiment results show that the material P diameter can be controlled by changing the parameters. The influence degree of parameters on material P diameter is shown that lead length > inner cavity diameter > outer cavity diameter. Finally, the optimized parameters of nozzle structure have been adjusted to estimate the material P diameter in 3D printing.

Modeling and Error Analysis of Monocular Stereo Vision System for Large-Scale Workpiece On-Machine Measurement

2010 ◽  
Vol 102-104 ◽  
pp. 397-401 ◽  
Author(s):  
Zhong Ren Wang ◽  
Yan Hua Wu ◽  
Yan Ming Quan
Keyword(s):  
Mathematical Model ◽  
Stereo Vision ◽  
Measurement System ◽  
Large Scale ◽  
Measurement Accuracy ◽  
Simulation Analysis ◽  
Vision System ◽  
Structure Parameters ◽  
Vision Measurement ◽  
Stereo Vision Measurement

A novel movable monocular stereo vision measurement system was designed considering the application objectives and on-machine measurement situation. The physical model and mathematical model for measurement accuracy was established. The appropriate structure parameters scope was obtained after simulation analysis. Finally, an application example of the measurement system is introduced.

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

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