Three-dimensional Loading Method of Railway Container Under Complex Constraints

2021 ◽  
Author(s):  
Wenni Huang ◽  
Shaoyang Zhang ◽  
Kang Yang ◽  
Zizhuo Zhang
Keyword(s):  
Three Dimensional ◽  
Loading Method ◽  
Complex Constraints

scholarly journals A Rapid Aerodynamic Loading Procedure for Centrifugal Impeller Design

1994 ◽  
Author(s):  
J. H. G. Howard ◽  
Colin Osborne ◽  
David Japikse
Keyword(s):  
Industrial Design ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Design Procedure ◽  
Inviscid Flow ◽  
Centrifugal Impeller ◽  
Zone Model ◽  
Geometry Design ◽  
Loading Method ◽  
Rapid Loading

A crucial aspect of the design process for centrifugal impellers is the establishment of specific blade shapes. A rapid inviscid flow analysis procedure was developed for incorporation within a geometry manipulation code. Using a single streamtube model, a single-pass computation technique was generated. A two-zone model ensures that key features of the passage flow physics are incorporated. Several examples of industrial design problems are employed to demonstrate the capabilities of the rapid loading method and its use in a geometry design procedure (used by some 20 industrial design groups worldwide). Comparisons with a quasi-three-dimensional method are included. The rapid loading method is most accurate when the meridional stream paths have similar shapes to those for the hub and shroud contours. The technique is useful within a geometry generation program since rapid aerodynamic screening of candidate configurations is allowed with sufficient accuracy to avoid the need for quasi-three-dimensional approaches. If required, the final design may be analyzed using three-dimensional viscous flow calculation methods.

A Numerical Method for Load Distribution in Threaded Connections

1996 ◽  
Vol 118 (2) ◽  
pp. 274-279 ◽  
Author(s):  
Hua Zhao
Keyword(s):  
Numerical Methods ◽  
Computational Model ◽  
Numerical Method ◽  
Load Distribution ◽  
Three Dimensional ◽  
Contact Loading ◽  
Loading Method ◽  
Load Distributions ◽  
Threaded Connections ◽  
Pipe Joints

The Virtual Contact Loading Method is developed in this paper to study the load distributions in bolt-nut connectors and threaded pipe joints. A simplified three-dimensional computational model is proposed in order to simulate the threaded connections. The calculated results for the bolt-nut connectors agree well with those from previous analytical and numerical methods. This method is of satisfactory efficiency and accuracy.

Design and Simulation Study of a Certain Landing Gear Loading Simulation System

2013 ◽  
Vol 871 ◽  
pp. 69-76
Author(s):  
Jun Gong Ma ◽  
Zhong Zhi Wu ◽  
Hao Ran Guo ◽  
Jia Li
Keyword(s):  
Three Dimensional ◽  
Simulation System ◽  
Landing Gear ◽  
Extension Mechanism ◽  
Loading Method ◽  
Test Platform ◽  
Loading System ◽  
Loading Tests ◽  
And Control

The landing gear ground loading tests is a vital part before flight. As the motion of landing gear is three-dimensional motion,the traditional loading method cannot effectively simulate the pneumatic load on the ground. In order to simulate the load in the process of retraction/extension, a loading simulation system is proposed, including retractile system, position follow-up system and force servo loading system. This paper analyzes retraction/extension mechanism of the landing gear and builds up its mathematical model. A co-simulation model is developed in which the hydraulic system model and control system are built in software AMESim, the mechanical system of test platform model is built in software ADAMS. The results of the simulation confirm that the loading simulation system is feasible and provide the basis for building hardware platform.

Entry trajectory generation with complex constraints based on three-dimensional acceleration profile

2019 ◽  
Vol 91 ◽  
pp. 231-240 ◽  
Author(s):  
Yuan-long Zhang ◽  
Yu Xie ◽  
Shuang-chun Peng ◽  
Guo-jian Tang ◽  
Wei-min Bao
Keyword(s):  
Three Dimensional ◽  
Trajectory Generation ◽  
Complex Constraints ◽  
Acceleration Profile

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

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