Kinematics Analysis and Simulation of a Shaper Mechanism Based on UG NX8.0

2014 ◽  
Vol 1006-1007 ◽  
pp. 336-339
Author(s):  
Li Wang ◽  
En Guang Zhang ◽  
Bo Wang
Keyword(s):  
Theoretical Calculation ◽  
Engineering Design ◽  
Calculation Method ◽  
Manufacturing Industry ◽  
Mutual Transformation ◽  
Advanced Manufacturing ◽  
Kinematics Analysis ◽  
Modeling Simulation ◽  
Integrate Modeling ◽  
Simulated Analysis

MOTION module of UG NX 8.0 is embedded with powerful ADAMS solver which can integrate modeling, simulation and analysis together, and the mutual transformation of various softwares is no longer required. This paper models the truss structure of a shaper mechanism in UG, and conducts kinematics simulated analysis. And the result is consistent with the result of the classical theoretical calculation, which verifies the reliability of UG NX8.0 MOTION module in the rigid body kinematics analysis. This paper proposes that convenient and rapid information software of advanced manufacturing industry, instead of the traditional complex theoretical calculation method, should be promoted and applied to solve the practical problems of engineering design.

scholarly journals Analysis of Seepage Characteristics of a Foundation Pit with Horizontal Waterproof Curtain in Highly Permeable Strata

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1303
Author(s):  
Chenghua Shi ◽  
Xiaohe Sun ◽  
Shengli Liu ◽  
Chengyong Cao ◽  
Linghui Liu ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Theoretical Calculation ◽  
Calculation Method ◽  
Design Method ◽  
Water Pressure ◽  
Water Inflow ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Seepage Characteristics

At present, jet-grouted horizontal waterproof curtain reinforcement has become an essential method for deep foundation pit groundwater control. However, there is still a lack of an effective theoretical calculation method for horizontal waterproof curtain reinforcement, and there is little research on the seepage laws of foundation pits under different horizontal waterproof curtain conditions. Based on Darcy’s seepage theory, theoretical analysis models of deep foundation pit seepage were established considering the effect of a horizontal curtain in a highly permeable formation. Through the established models, the calculation method of the water inflow and the water pressure under the condition of a horizontal curtain was derived. Then through indoor tests, the reliability of the theoretical calculation method was verified. Furthermore, the established theoretical calculation method is used to analyze the influence of various factors on the water inflow and the water pressure, such as the ratio of hydraulic conductivity of the horizontal curtain to surrounding soil, thickness, and reinforcement position of the horizontal curtain. It is found that the hydraulic conductivity ratio has the most significant influence on the seepage characteristics of the foundation pit. Finally, the design method was applied to an example of the horizontal waterproof curtain of the foundation pit, which is located at Juyuanzhou Station in Fuzhou (China). The water inflow per unit area is 0.36 m3/d in the foundation pit, and this implies that the design method of the horizontal waterproof curtain applied for the excavation case is good and meets the requirements of design and safety.

Study on the Calculation Method of Soil-Nailing for High Soil Slope Based on the Logarithmic Spiral Slippery Fracture

2011 ◽  
Vol 261-263 ◽  
pp. 1709-1713
Author(s):  
Meng Yang ◽  
Xiao Min Liu
Keyword(s):  
Mathematical Model ◽  
Stability Analysis ◽  
Engineering Design ◽  
Calculation Method ◽  
Logarithmic Spiral ◽  
Soil Nailing ◽  
Soil Slope ◽  
Mode Pattern ◽  
Shear Function

This paper introduces a new failure mode pattern of soil slope – the logarithmic spiral slippery fracture. A mathematical model for the logarithmic spiral slippery fracture is established, taking the anti-shear function of the soil-nailing into consideration. The shear of soil-nailing, axial force, and the safety coefficients based on the limiting equilibrium method are derived, leading to an accurate stability analysis of the strengthening of soil slope. A case study shows that the anti-shear function of the soil-nailing can be significant and should not be ignored in engineering design.

Theoretical and Numerical Calculation on the Added Mass of Ahmed Body

2017 ◽  
Vol 865 ◽  
pp. 247-252
Author(s):  
Gui Tao Du
Keyword(s):  
Numerical Calculation ◽  
Theoretical Calculation ◽  
Calculation Method ◽  
Aerodynamic Drag ◽  
Added Mass ◽  
The Body ◽  
Power Performance ◽  
Car Body ◽  
The Impact ◽  
Ahmed Body

Because of the added mass, the aerodynamic drag of the automobile will increase obviously when accelerating in the still air. In this paper, it firstly gave the definition of the added mass, and presented that there was little research on the calculation of the added mass of automobile. Then through the analysis of the theoretical calculation method for the added mass, it pointed out that, for the added mass of the car-body with a complex shape, there was much difficulty in the theoretical calculation. Alternatively, a numerical calculation method for the added mass of car-body was derived. The simulation model adopted the Ahmed body and the corresponding verification experiment was completed in the Tongji Automotive Wind Tunnel center. The results indicate that the added mass is a constant which is only dependent on the body-shape. For the model investigated, the added mass is 0.0052kg that is approximately equal to the air displaced by the car-body. As the body accelerates to 4m/s2, the aerodynamic drag is increased by 1.89% because of added mass. Therefore, it needs to pay more attention to the impact that the added mass has on the dynamic performance of vehicle when proceeding the aerodynamic designs (especially for the high power performance vehicles). Meanwhile, it still makes a correction to the conventional aerodynamic drag formula. This paper also demonstrates that, with the analysis of the flow-field of car-body, the added mass essentially stems from the additionally work done by the car-body to increase the kinetic energy of external fluid as it speeds up.

Developing Equipment Manufacturing Industry Based on Service-Oriented Manufacturing

2013 ◽  
Vol 655-657 ◽  
pp. 2340-2343
Author(s):  
Li Xi Yang ◽  
Xu Fang Zhou
Keyword(s):  
Manufacturing Industry ◽  
Value Added ◽  
Present Situation ◽  
Advanced Manufacturing ◽  
Aggregation Mechanism ◽  
Equipment Manufacturing ◽  
Equipment Manufacturing Industry ◽  
Service Oriented ◽  
Manufacturing Mode ◽  
Insight Into

Service-oriented manufacturing is an advanced manufacturing mode focused on integrating service with manufacturing. The remarkable importance is known to be strongly associated with the development of service-oriented economy in the period in which China transfers the traditional equipment manufacturing industry to the service-oriented manufacturing. We take a close insight into basic theories of service-oriented manufacturing, and then we analyze the characteristics, profiles, as well as the present situation of the equipment manufacturing. Finally, we propose some countermeasures for transferring the equipment manufacturing to the service-oriented manufacturing from the views of the aggregation mechanism, the network of innovative mechanism and manufacturing value-added chain.

scholarly journals Theoretical calculation method for crack resistance of jacketed RC columns

2019 ◽  
Vol 708 ◽  
pp. 012059 ◽  
Author(s):  
Pavlo Krainskyi ◽  
Pavlo Vegera ◽  
Roman Khmil ◽  
Zinoviy Blikharskyy
Keyword(s):  
Theoretical Calculation ◽  
Crack Resistance ◽  
Calculation Method ◽  
Rc Columns

scholarly journals Water-Exit Process Modeling and Added-Mass Calculation of the Submarine-Launched Missile

2017 ◽  
Vol 24 (s3) ◽  
pp. 152-164 ◽  
Author(s):  
Jian Yang ◽  
Jinfu Feng ◽  
Yongli Li ◽  
An Liu ◽  
Junhua Hu ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Calculation Method ◽  
Added Mass ◽  
Simulation Software ◽  
Fluid Simulation ◽  
Modeling Process ◽  
Complex Fluid ◽  
Simulated Analysis ◽  
Changing Rate ◽  
Water Exit

Abstract In the process that the submarine-launched missile exits the water, there is the complex fluid solid coupling phenomenon. Therefore, it is difficult to establish the accurate water-exit dynamic model. In the paper, according to the characteristics of the water-exit motion, based on the traditional method of added mass, considering the added mass changing rate, the water-exit dynamic model is established. And with help of the CFX fluid simulation software, a new calculation method of the added mass that is suit for submarine-launched missile is proposed, which can effectively solve the problem of fluid solid coupling in modeling process. Then by the new calculation method, the change law of the added mass in water-exit process of the missile is obtained. In simulated analysis, for the water-exit process of the missile, by comparing the results of the numerical simulation and the calculation of theoretical model, the effectiveness of the new added mass calculation method and the accuracy of the water-exit dynamic model that considers the added mass changing rate are verified.

Average value of the shape and direction factor in the equation of refractive index

2017 ◽  
Vol 31 (29) ◽  
pp. 1750263 ◽  
Author(s):  
Tao Zhang
Keyword(s):  
Refractive Index ◽  
Theoretical Calculation ◽  
Calculation Method ◽  
Electromagnetic Induction ◽  
Optical Materials ◽  
Electron Cloud ◽  
Refractive Indices ◽  
Average Value ◽  
Electron Clouds ◽  
Induction Energy

The theoretical calculation of the refractive indices is of great significance for the developments of new optical materials. The calculation method of refractive index, which was deduced from the electron-cloud-conductor model, contains the shape and direction factor [Formula: see text]. [Formula: see text] affects the electromagnetic-induction energy absorbed by the electron clouds, thereby influencing the refractive indices. It is not yet known how to calculate [Formula: see text] value of non-spherical electron clouds. In this paper, [Formula: see text] value is derived by imaginatively dividing the electron cloud into numerous little volume elements and then regrouping them. This paper proves that [Formula: see text] when molecules’ spatial orientations distribute randomly. The calculations of the refractive indices of several substances validate this equation. This result will help to promote the application of the calculation method of refractive index.

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