scholarly journals Analysis of the mechanism dissipation of mechanical energy flow in adiabatic throttling incompressible liquid

2020 ◽  
Vol 574 ◽  
pp. 012042
Author(s):  
A Kulikov ◽  
I Ivanova ◽  
S Spiridonov ◽  
B Martynov ◽  
A Krivonogova
Keyword(s):  
Energy Flow ◽  
Incompressible Liquid ◽  
Mechanical Energy

Mechanical energy flow models of rods and beams

1992 ◽  
Vol 153 (1) ◽  
pp. 1-19 ◽  
Author(s):  
J.C. Wohlever ◽  
R.J. Bernhard
Keyword(s):  
Energy Flow ◽  
Mechanical Energy ◽  
Flow Models

scholarly journals Influences of trunk flexion on mechanical energy flow in the lower extremities during gait

2016 ◽  
Vol 28 (5) ◽  
pp. 1459-1464
Author(s):  
Takuya Takeda ◽  
Masaya Anan ◽  
Makoto Takahashi ◽  
Yuta Ogata ◽  
Kenji Tanimoto ◽  
...  
Keyword(s):  
Energy Flow ◽  
Mechanical Energy ◽  
Lower Extremities ◽  
Trunk Flexion

Methods for Studying Energy Costs and Energy Flow During Human Locomotion

1967 ◽  
Vol 9 (6) ◽  
pp. 603-608 ◽  
Author(s):  
L. Lukin ◽  
M. J. Polissar ◽  
H. J. Ralston
Keyword(s):  
Energy Flow ◽  
Human Subject ◽  
Mechanical Energy ◽  
Metabolic Cost ◽  
Human Locomotion ◽  
Single Step ◽  
Energy Costs ◽  
Muscle Action ◽  
Vertical Lift ◽  
Work Done

Methods are described for studying the metabolic cost of increased and diminished gravitational work done by the human subject during normal locomotion at various speeds and slopes on the treadmill. It is shown that the energy expenditure is a linear function of the gravitational work and, as long as the gait is of a smooth and natural character, appears to be dependent upon the true vertical lift per step multiplied by the number of steps per minute. The true vertical lift is defined as the lift resulting from muscle action, as contrasted with components due to treadmill motion. Methods are also described for recording the vertical and translational motions of the torso during a single step, and for analyzing the flow of mechanical energy into and out of the torso during each phase of the walking cycle. Implications for calculation of efficiency are briefly discussed.

Mechanical energy flow in torso during baseball toss batting

2021 ◽  
pp. 1-11
Author(s):  
Gen Horiuchi ◽  
Hirotaka Nakashima ◽  
Shinji Sakurai
Keyword(s):  
Energy Flow ◽  
Mechanical Energy

scholarly journals Taking a Stab at Quantifying the Energetics of Biological Puncture

2019 ◽  
Vol 59 (6) ◽  
pp. 1586-1596
Author(s):  
Philip S L Anderson ◽  
Stephanie B Crofts ◽  
Jin-Tae Kim ◽  
Leonardo P Chamorro
Keyword(s):  
Momentum Transfer ◽  
Energy Flow ◽  
High Speed ◽  
Mechanical Energy ◽  
Proper Function ◽  
Input Energy ◽  
Target Movement ◽  
Energy Flows ◽  
Tool Shape ◽  
The Relationship

Abstract An organism’s ability to control the timing and direction of energy flow both within its body and out to the surrounding environment is vital to maintaining proper function. When physically interacting with an external target, the mechanical energy applied by the organism can be transferred to the target as several types of output energy, such as target deformation, target fracture, or as a transfer of momentum. The particular function being performed will dictate which of these results is most adaptive to the organism. Chewing food favors fracture, whereas running favors the transfer of momentum from the appendages to the ground. Here, we explore the relationship between deformation, fracture, and momentum transfer in biological puncture systems. Puncture is a widespread behavior in biology requiring energy transfer into a target to allow fracture and subsequent insertion of the tool. Existing correlations between both tool shape and tool dynamics with puncture success do not account for what energy may be lost due to deformation and momentum transfer in biological systems. Using a combination of pendulum tests and particle tracking velocimetry (PTV), we explored the contributions of fracture, deformation and momentum to puncture events using a gaboon viper fang. Results on unrestrained targets illustrate that momentum transfer between tool and target, controlled by the relative masses of the two, can influence the extent of fracture achieved during high-speed puncture. PTV allowed us to quantify deformation throughout the target during puncture and tease apart how input energy is partitioned between deformation and fracture. The relationship between input energy, target deformation and target fracture is non-linear; increasing impact speed from 2.0 to 2.5 m/s created no further fracture, but did increase deformation while increasing speed to 3.0 m/s allowed an equivalent amount of fracture to be achieved for less overall deformation. These results point to a new framework for examining puncture systems, where the relative resistances to deformation, fracture and target movement dictate where energy flows during impact. Further developing these methods will allow researchers to quantify the energetics of puncture systems in a way that is comparable across a broad range of organisms and connect energy flow within an organism to how that energy is eventually transferred to the environment.

scholarly journals ENHANCING THE PRODUCTIVITY OF VIBRATORY PROCESSING OF DETAILS BY USING THE USE OF DISCARDED ENERGY CIRCULATION MOVEMENT OF THE WORKING ENVIRONMENT

2019 ◽  
pp. 56-66
Author(s):  
Leonid Yaroshenko
Keyword(s):  
Experimental Research ◽  
Energy Flow ◽  
Energy Intensity ◽  
Mechanical Energy ◽  
Working Environment ◽  
Design Parameters ◽  
Planetary Motion ◽  
Processing Efficiency ◽  
Abrasive Treatment ◽  
Machined Parts

The distribution of mechanical energy in vibratory toroidal machines with vertical driven unbalanced shafts is investigated experimentally, depending on their design parameters and the characteristics of the working environment. The conclusion about the possibility of utilization of mechanical energy circulating movement of the working environment of the machine and its appliance to auxiliary drive movements of the machined parts is substantiated. As established during experimental research, the provision of machined parts during the vibration abrasive treatment of forced planetary motion, due to the utilized energy flow of circulation of the working environment resulted in an increase in the processing efficiency of 1.8 times without increasing the overall energy intensity of the process.

Active and Reactive Structural Energy Flow

1997 ◽  
Vol 119 (1) ◽  
pp. 70-79 ◽  
Author(s):  
K. S. Alfredsson
Keyword(s):  
Energy Flow ◽  
Continuum Model ◽  
Reactive Power ◽  
Mechanical Energy ◽  
Harmonic Vibration ◽  
Dynamic Loads ◽  
Numerical Examples ◽  
Continuity Equations ◽  
Active And Reactive Power ◽  
Stationary Vibration

Vibration of linear structures having internal material damping is considered. Energy supplied to such structures by external dynamic loads and mechanical energy flow inside these structures are investigated. The paper aims at presenting and discussing relations which are useful when studying energy transmission through mechanical systems. Special attention is paid to the case of stationary harmonic vibration, but general stationary vibration is also discussed. Continuity equations for the active and reactive mechanical intensities are derived for a solid continuum model. Limits for the active and reactive power supplied to a structure in terms of structural and loading properties are also established. Numerical examples with discrete, continuous and discretized structures demonstrate the results obtained.

Sign in / Sign up

Export Citation Format

Share Document