Simulation Analysis of Head and Neck Dynamic Response

Given the importance of the jib system which has direct impact on the comprehensive performance of portal crane, this article regards the Jib system as a whole. Detailed finite element model of the jib system was established and vibration modes were calculated based on the finite element method. This paper conducted a transient dynamic simulation and obtained dynamic response to the boom structure in the process of lifting rated weight at the maximum amplitude position. This research approach is not only very useful to obtain dynamic response and assess the fatigue life of the jib system in the design phase, but also to provide a theoretical basis for the design of portal crane.

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The Effect of the Initial Position of the Head and Neck on the Dynamic Response of the Human Head and Neck to -Gx Impact Acceleration

10.4271/751157 ◽

1975 ◽

Cited By ~ 36

Author(s):

C. L. Ewing ◽

D. J. Thomas ◽

L. Lustick ◽

E. Becker ◽

G. Willems ◽

...

Keyword(s):

Dynamic Response ◽

Head And Neck ◽

Human Head ◽

Initial Position ◽

Impact Acceleration

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Living Human Dynamic Response to —Gx Impact Acceleration II—Accelerations Measured on the Head and Neck

10.4271/690817 ◽

1969 ◽

Cited By ~ 40

Author(s):

C. L. Ewing ◽

D. J. Thomas ◽

L. M. Patrick ◽

G. W. Beeler ◽

M. J. Smith

Keyword(s):

Dynamic Response ◽

Head And Neck ◽

Impact Acceleration

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Typical Brackets Dimensional Numerical Simulation of the Wooden Structure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1008-1009.1250 ◽

2014 ◽

Vol 1008-1009 ◽

pp. 1250-1253

Author(s):

Wei Chao Ao ◽

Qing Fang Niu ◽

Guan Feng Qiao ◽

Tie Ying Li

Keyword(s):

Numerical Simulation ◽

Finite Element ◽

Dynamic Response ◽

Failure Modes ◽

Simulation Analysis ◽

Dual Function ◽

Finite Element Software ◽

The Ancient Chinese ◽

Mechanism Of Failure ◽

Architectural Ornament

Brackets is the ancient Chinese wooden building unique ways and one of the main features of the structure. Its dual function of both structural and architectural: An important component of both the structure itself, because of its flexible features tenon, the dynamic response of the structure can absorb greater energy, play a good role in the earthquake; But it is also a special architectural ornament, can play the effect of beautifying buildings. Therefore, this paper based on the finite element software ABAQUS brackets by the force of the mechanism of failure modes and numerical simulation analysis for the brackets and the whole structure of the wood to provide a scientific assessment and reinforcement.

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Mechanism for Control of Head and Neck Dynamic Response

10.4271/841669 ◽

1984 ◽

Cited By ~ 4

Author(s):

Marjorie R. Seemann ◽

Leonard S. Lustick ◽

Georg D. Frisch

Keyword(s):

Dynamic Response ◽

Head And Neck

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Dynamic Response of the Head and Neck of the Living Human to —Gx Impact Acceleration

10.4271/680792 ◽

1968 ◽

Cited By ~ 37

Author(s):

Channing L. Ewing ◽

Daniel J. Thomas ◽

George W. Beeler ◽

Lawrence M. Patrick ◽

David B. Gillis

Keyword(s):

Dynamic Response ◽

Head And Neck ◽

Impact Acceleration

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Simulation Based Design and Optimization of Digital Pump/Motors

ASME/BATH 2013 Symposium on Fluid Power and Motion Control ◽

10.1115/fpmc2013-4475 ◽

2013 ◽

Cited By ~ 2

Author(s):

Kyle J. Merrill ◽

Farid Y. Breidi ◽

John Lumkes

Keyword(s):

Dynamic Response ◽

High Speed ◽

Simulation Analysis ◽

Significant Loss ◽

Operating Characteristics ◽

Flow Ripple ◽

Design And Optimization ◽

Piston Cylinder ◽

Operating Strategies ◽

Design Tradeoffs

Current state of the art variable displacement pump/motors have high efficiencies when operating at high displacements. However, as the displacement of the pump/motor is reduced, the efficiency significantly decreases. Digital pump/motors aim to increase the efficiency and range of operation of the fluid power system by minimizing leakages, friction losses and compressibility losses. It is based on the concept of actively controlling high speed on/off valves connected to each piston cylinder displacement chamber. This work involves the development of a coupled dynamic model of a digital hydraulic pump/motor that is crucial for understanding the design tradeoffs and operating characteristics of the digital pump/motor. This simulation model can be used to characterize and predict the efficiency, define the dynamic response and flow requirements of on/off valves required to provide significant improvements in efficiency and dynamic response over traditional pump/motors, and perform design optimization studies. The model can analyze different operating strategies (flow limiting and flow diverting) and characterize the effects on pump/motor efficiency and flow ripple. The simulation analysis shows that the sequential flow limiting strategy yields the lowest power loss in both pumping and motoring and that small variances in the valve response would cause a significant loss of power.

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