Analysis of the Vibration Characteristic for an Orbital Friction Vibration Actuator

2013 ◽  
Vol 416-417 ◽  
pp. 925-930 ◽  
Author(s):  
Yong Li ◽  
Fei Xu ◽  
Jian Hui Hu ◽  
Ji Bin Zou ◽  
Kai Liu
Keyword(s):  
Solid State ◽  
Theoretical Analysis ◽  
Mathematical Analysis ◽  
Vibration Characteristic ◽  
Core Component ◽  
Friction Heat ◽  
Electromagnetic Structure ◽  
Welding Technology ◽  
Core Issue ◽  
Amplitude Amplification

Orbital Friction Vibration Actuator (OFVA) is a core component of Orbital Friction Welding (OFW), which is a novel apertureless welding technology utilizing friction heat to implement solid-state. By taking advantage of the special electromagnetic structure, OFVA can produce a contactless, radial, synchronous and rotating force with adjustable amplitude and phase upon the still mover which then vibrate according to the predetermined orbital. This paper analyzes the operational principle and structure of OFVA and conducts a mathematical analysis for a core issue about how to make the motion component of the OFVA generate circular moving trajectories. Vibration characteristic of are analyzed and the expressions of amplitude amplification factors as the moving component is moving in a circle are derived. Simulations are carried out to validate the theoretical analysis, which proved that the design was correct and engineering practical.

Theoretical analysis of the solid-state terahertz spectrum of the high explosive RDX

2008 ◽  
Vol 463 (1-3) ◽  
pp. 84-89 ◽  
Author(s):  
Damian G. Allis ◽  
J. Axel Zeitler ◽  
Philip F. Taday ◽  
Timothy M. Korter
Keyword(s):  
Solid State ◽  
Theoretical Analysis ◽  
High Explosive ◽  
Terahertz Spectrum

scholarly journals Research on Vacuum Arc Commutation Characteristics of a Natural-Commutate Hybrid DC Circuit Breaker

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4823
Author(s):  
Dequan Wang ◽  
Minfu Liao ◽  
Rufan Wang ◽  
Tenghui Li ◽  
Jun Qiu ◽  
...  
Keyword(s):  
Solid State ◽  
Theoretical Analysis ◽  
Theoretical Foundation ◽  
Circuit Breaker ◽  
Vacuum Arc ◽  
Important Process ◽  
Mathematical Formula ◽  
Arc Voltage ◽  
Dc Circuit Breaker ◽  
Key Parameter

Vacuum arc commutation is an important process in natural-commutate hybrid direct current (DC) circuit breaker (NHCB) interruption, as the duration of vacuum arc commutation will directly affect the arcing time and interrupting time of NHCB. In this paper, the vacuum arc commutation model of NHCB was established by simplifying solid-state switch (SS) and vacuum arc voltage. Through theoretical analysis and experiments, the vacuum arc commutation characteristics of NHCB were studied. The mathematical formula of the effect of main parameters on the duration of vacuum arc commutation is obtained, and the changing law of the influence of the main parameters on the duration of the vacuum arc commutation is explored. The concept of vacuum arc commutation coefficient is proposed, and it is a key parameter that influences the vacuum arc commutation characteristics. The research on the characteristics of vacuum arc commutation can provide theoretical foundation for the structure and parameter optimization of NHCB and other equipment that uses vacuum arc commutation.

A theoretical analysis of the matching of assets to liabilities

1984 ◽  
Vol 111 (2) ◽  
pp. 375-402 ◽  
Author(s):  
A. J. Wise
Keyword(s):  
Theoretical Analysis ◽  
Mathematical Analysis ◽  
Cash Flows ◽  
Insurance Contract ◽  
Pension Scheme ◽  
The Future ◽  
The Subject ◽  
The Given ◽  
Future Cash Flows

1.1. This paper is supplementary to another by the same author on the subject of matching. It describes the mathematical analysis of the following problem.1.2. We are given:1. a pattern of expected future cash flows under a pension scheme or insurance contract;2. a set of investments available for purchase; and3. a model of the future behaviour of investment conditions.What set or sets of available investments would provide the best match against the given liabilities in order to minimize any likely surplus or deficiency on completion of the liability cash flows?

scholarly journals Mn2+ doped CdAl2O4 phosphors with new structure and special fluorescence properties: experimental and theoretical analysis

RSC Advances ◽  
2017 ◽  
Vol 7 (29) ◽  
pp. 17612-17619 ◽  
Author(s):  
Weiguang Ran ◽  
Lili Wang ◽  
Qingzhi Liu ◽  
Guangzeng Liu ◽  
Dan Qu ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Theoretical Analysis ◽  
Solid State Reaction ◽  
Fluorescence Properties ◽  
Luminescence Properties ◽  
Space Group

Mn2+-activated CdAl2O4 phosphors with the new structure of space group R3̄ (no. 148) have been prepared by a high-temperature solid-state reaction and their luminescence properties have been investigated in detail.

Solid-state IR–LD spectroscopic and theoretical analysis of glycine-containing peptides and their hydrochlorides

Biopolymers ◽  
2006 ◽  
Vol 82 (6) ◽  
pp. 587-596 ◽  
Author(s):  
Bojidarka B. Ivanova ◽  
Tsonko Kolev ◽  
Sonya Y. Zareva
Keyword(s):  
Solid State ◽  
Theoretical Analysis

scholarly journals Global Dynamics for an Age-Structured Cholera Infection Model with General Infection Rates

Mathematics ◽  
2021 ◽  
Vol 9 (23) ◽  
pp. 2993
Author(s):  
Xin Jiang
Keyword(s):  
Theoretical Analysis ◽  
Mathematical Analysis ◽  
Local Stability ◽  
Infection Model ◽  
Global Behavior ◽  
Uniform Persistence ◽  
Global Dynamics ◽  
Infection Rates ◽  
Age Structured ◽  
Rigorous Mathematical Analysis

This paper studies the global dynamics of a cholera model incorporating age structures and general infection rates. First, we explore the existence and point dissipativeness of the orbit and analyze the asymptotical smoothness. Then, we perform rigorous mathematical analysis on the existence and local stability of equilibria. Based on the uniform persistence, we further investigate the global behavior of the cholera infection model. The results of theoretical analysis are well confirmed by numerical simulations. This research generalizes some known results and provides deeper insights into the dynamics of cholera propagation.

Diverse structural assemblies of U-shaped hydrazinyl-sulfonamides: experimental and theoretical analysis of non-covalent interactions stabilizing solid state conformations

CrystEngComm ◽  
2019 ◽  
Vol 21 (11) ◽  
pp. 1780-1793 ◽  
Author(s):  
Hina Andleeb ◽  
Imtiaz Khan ◽  
Antonio Franconetti ◽  
Muhammad Nawaz Tahir ◽  
Jim Simpson ◽  
...  
Keyword(s):  
Solid State ◽  
Theoretical Analysis ◽  
Non Covalent Interactions ◽  
Covalent Interactions

The preparation and structures of five new U-shaped hydrazinyl-sulfonamides are reported.

All-metal σ-antiaromaticity in dimeric cluster anion {[CuGe9Mes]2}4−

2020 ◽  
Vol 56 (48) ◽  
pp. 6583-6586 ◽  
Author(s):  
Zi-Chuan Wang ◽  
Nikolay V. Tkachenko ◽  
Lei Qiao ◽  
Eduard Matito ◽  
Alvaro Muñoz-Castro ◽  
...  
Keyword(s):  
Solid State ◽  
Theoretical Analysis ◽  
Cluster Anion

In this work, we firstly synthesized a solid-state compound {[CuGe9Mes]2}4− with a planar Cu2Ge2 fragment. By performing the thorough theoretical analysis, we showed that Cu2Ge2 diamond fragment possesses σ-antiaromatic properties.

Theoretical analysis of ammoniaborane and alkylammoniaborane at the solid state

2017 ◽  
Author(s):  
Mariano Méndez Chávez
Keyword(s):  
Density Functional Theory ◽  
Solid State ◽  
Theoretical Analysis ◽  
Gas Phase ◽  
Density Functional ◽  
Structural Parameters ◽  
Ammonia Borane ◽  
Functional Theory ◽  
The Density Functional Theory

This work deals with a benchmark for the calculation of the structural parameters of ammonia-borane and alkylammonia-borane at the solid state, using hybrid and GGA functionals in the framework of the Density Functional Theory as well as the use of Grimme's empirical dispersion. A comparison for some dimers of the aforementioned species, calculated at the gas-phase at the level MP2/aug-cc-pVTZ is discussed.

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