Dynamic response prediction of a twin-screw compressor with gas-induced cyclic loads based on multi-body dynamics

2016 ◽  
Vol 65 ◽  
pp. 111-128 ◽  
Author(s):  
Yu-Ren Wu ◽  
Van-The Tran
Keyword(s):  
Dynamic Response ◽  
Response Prediction ◽  
Screw Compressor ◽  
Cyclic Loads ◽  
Body Dynamics ◽  
Twin Screw ◽  
Multi Body

A study of dynamic response of a wind turbine blade based on the multi-body dynamics method

2020 ◽  
Vol 155 ◽  
pp. 358-368 ◽  
Author(s):  
Jin Xu ◽  
Lei Zhang ◽  
Xue Li ◽  
Shuang Li ◽  
Ke Yang
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Body Dynamics ◽  
Multi Body ◽  
Dynamics Method

Dynamics of Flexible Beams and Plates Under Large Overall Motions

1991 ◽  
Author(s):  
Z.-E. Boutaghou ◽  
A. G. Erdman ◽  
H. K. Stolarski
Keyword(s):  
Dynamic Response ◽  
Nonlinear Interaction ◽  
Present Theory ◽  
Rigid Body Dynamics ◽  
Unified Approach ◽  
Flexible Beams ◽  
Dynamic Stiffening ◽  
Body Dynamics ◽  
Arbitrary Representation ◽  
Multi Body

Abstract The dynamic response of flexible beams, plates, and solids undergoing arbitrary spatial motions are systematically derived via a unified approach. This formulation is capable of incorporating arbitrary representation of the kinematics of deformation, phenomenon of dynamic stiffening, and complete nonlinear interaction between elastic- and rigid-body dynamics encountered in constrained multi-body systems. It is shown that the present theory captures the phenomenon of dynamic stiffening due to the transfer of the axial and membrane forces to the bending equations of beams and plates, respectively. Examples are presented to illustrate the proposed formulations.

Dynamic Analysis for Rotors of a Twin-Screw Compressor with Gas-Induced Cyclic Loads

2015 ◽  
Vol 789-790 ◽  
pp. 220-225
Author(s):  
Yu Ren Wu ◽  
Van The Tran ◽  
Po Hua Hsu
Keyword(s):  
Multibody Dynamics ◽  
Noise Spectrum ◽  
Dynamics Simulation ◽  
Screw Compressor ◽  
Cyclic Loads ◽  
Frequency Domains ◽  
Dynamic Forces ◽  
New Strategy ◽  
Twin Screw ◽  
Screw Rotors

The effects of dynamic forces and elastic contacts in a pair of intermeshing rotors with the gas-induced cyclic loads based on the multibody dynamics simulation have not investigated yet. The comparison of numerical spectra of time and frequency domains of acceleration with the experimental noise spectrum of an oil-injected twin-screw compressor has not also considered. Therefore, this study proposes a new strategy, which combines the fluctuating torques and forces induced by cyclic gas pressure on the screw rotors to numerically predict vibration response in an oil-injected twin-screw compressor.

Application of Virtual Substance in Launch Dynamics Simulation for Self-Propelled Guns

2012 ◽  
Vol 236-237 ◽  
pp. 1296-1301
Author(s):  
Shi Ye Chen ◽  
Liang Ming Wang ◽  
Wei Shi
Keyword(s):  
Experimental Data ◽  
Dynamic Response ◽  
Modeling Method ◽  
Dynamics Simulation ◽  
Dynamics Model ◽  
System A ◽  
Body Dynamics ◽  
Multi Body

To establish more accurate and effective gun dynamics model, which considered fully the coupling influence of projectile and flexible barrel, by introducing the virtual substance into the barrel system, a modeling method for self-propelled guns was presented. Taking a tracked self-propelled gun for an example, combining Ansys and Recurdyn, a multi-body dynamics model was built up. The correlation curves between the experimental data and the simulation result under the same firing conditions were obtained. The results show that the model can describe accurately the dynamic response and the projectile movement, which can provide theoretical references for the further research on gun launch dynamics characteristics.

Dynamic Analysis on Crank-Slider Mechanism of Reciprocating Pump

2011 ◽  
Vol 697-698 ◽  
pp. 676-680
Author(s):  
Z.G. Han ◽  
Qing Jian Liu
Keyword(s):  
Dynamic Response ◽  
Dynamic Analysis ◽  
Dynamic Model ◽  
Dynamic Behavior ◽  
Rotational Speed ◽  
Analysis And Design ◽  
Numerical Example ◽  
Body Dynamics ◽  
Reciprocating Pump ◽  
Multi Body

The crank-slider mechanism is the key component in reciprocating pumps. With the increase of the rotational speed of the crank-slider mechanism, the vibration and working noise of reciprocating pumps increase. Based on the multi-body dynamics theory, the dynamic model of the crank-slider mechanism of reciprocating pumps is proposed. A numerical example is given and the validity of the procedure developed here is demonstrated by analyzing the dynamic behavior of a typical crank-slider mechanism of the reciprocating pump. The model can well simulate the dynamic response of the mechanism, which can enable designers to obtain required information on the analysis and design of reciprocating pumps.

scholarly journals Estimating maximum bite performance in Tyrannosaurus rex using multi-body dynamics

2012 ◽  
Vol 8 (4) ◽  
pp. 660-664 ◽  
Author(s):  
K. T. Bates ◽  
P. L. Falkingham
Keyword(s):  
Body Size ◽  
Feeding Behaviour ◽  
Ontogenetic Change ◽  
Positive Allometry ◽  
Musculoskeletal Models ◽  
Terrestrial Animal ◽  
Body Dynamics ◽  
Mode Of Life ◽  
Scaling Analyses ◽  
Multi Body

Bite mechanics and feeding behaviour in Tyrannosaurus rex are controversial. Some contend that a modest bite mechanically limited T. rex to scavenging, while others argue that high bite forces facilitated a predatory mode of life. We use dynamic musculoskeletal models to simulate maximal biting in T. rex . Models predict that adult T. rex generated sustained bite forces of 35 000–57 000 N at a single posterior tooth, by far the highest bite forces estimated for any terrestrial animal. Scaling analyses suggest that adult T. rex had a strong bite for its body size, and that bite performance increased allometrically during ontogeny. Positive allometry in bite performance during growth may have facilitated an ontogenetic change in feeding behaviour in T. rex , associated with an expansion of prey range in adults to include the largest contemporaneous animals.

Sir Robert Stawell Ball and methodologies of modern screw theory

2002 ◽  
Vol 216 (1) ◽  
pp. 1-11 ◽  
Author(s):  
H Lipkin ◽  
J Duffy
Keyword(s):  
Computational Geometry ◽  
Rigid Body ◽  
Lie Algebra ◽  
Screw Theory ◽  
Mechanical Design ◽  
Ball Screw ◽  
Dual Numbers ◽  
Body Dynamics ◽  
Rigid Body Mechanics ◽  
Multi Body

The theory of screws was largely developed by Sir Robert Stawell Ball over 100 years ago to investigate general problems in rigid body mechanics. Nowadays, screw theory is applied in many different but related forms including dual numbers, Plilcker coordinates and Lie algebra. An overview of these methodologies is presented along with a perspective on Ball. Screw theory has re-emerged after a hiatus to become an important tool in robot mechanics, mechanical design, computational geometry and multi-body dynamics.

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