Stimulation on Anti-Shock Characteristic of Diesel Engine

2013 ◽  
Vol 631-632 ◽  
pp. 920-924
Author(s):  
Min Peng
Keyword(s):  
Diesel Engine ◽  
Test Methods ◽  
Practical Significance ◽  
High Price ◽  
Performance Limits ◽  
Shock Test ◽  
The Real ◽  
Simulation Results ◽  
Virtual Platform ◽  
Shock Characteristic

With more and more attention being paid to anti-shock of the warship by many country’s navy, it is of practical significance to study the anti-shock characteristic of the diesel engine which belongs to the A class facility on warship. Owing to the high price of shock test, simulation combined with partial shock test methods are adopted by many countries to ensure the facility’s anti-shock performance. A numeric virtual platform of TBD234V6 diesel engine generator set is built by means of software MSC.ADAMS and four machine feet of the diesel engine are modeled flexibly. The virtual shock test of the generator set is conducted on this platform according to the German shock standard BV043/85 and anti-shock performance limits of the machine feet is obtained. Hammer experiment is also carried out on the real generator set. After the comparison of the simulation results and the experiment results, the deficiency aspects need to be improved are pointed out at last.

Shock Test and Acceleration Analysis Methods of Marine Diesel Engines to Underwater Explosions

2013 ◽  
Vol 345 ◽  
pp. 64-67
Author(s):  
Jian Hua Zhao ◽  
Rui Bo Zhang ◽  
De Bin Zhu ◽  
Hong Bin Gao
Keyword(s):  
Diesel Engine ◽  
Low Frequency ◽  
Vibration Signal ◽  
Test Methods ◽  
Shock Acceleration ◽  
Test Results ◽  
Shock Test ◽  
Marine Diesel ◽  
Reduction Methods ◽  
Acceleration Analysis

Shock test of marine diesel engine is the important content for ship anti-shock research. Plentiful shock tests of equipments have been carried out abroad, but there is no detailed test methods of diesel engine. According to simulation results, 8-channel acceleration test points are determined. Because diesel engine is working, the measured shock acceleration is interfered by vibration signal. Orthogonal wavelet decomposition and wavelet noise reduction methods are used to separate shock component from test results. The seperated shock component consists of two parts. One is the low-frequency part caused by the shock from diesel foundation and then attenuation through the isolator, the other is the high-frequency part caused by the secondary shock of the retainer.

Factual Power Loss Diminution by Enhanced Frog Leaping Algorithm

2020 ◽  
Vol 3 (2) ◽  
pp. 114-118
Author(s):  
Kanagasabai Lenin
Keyword(s):  
Local Search ◽  
Power Loss ◽  
Reactive Power ◽  
Test System ◽  
Premature Convergence ◽  
Speed Of Convergence ◽  
Real Power ◽  
The Real ◽  
Simulation Results ◽  
Power Problem

This paper proposes Enhanced Frog Leaping Algorithm (EFLA) to solve the optimal reactive power problem. Frog leaping algorithm (FLA) replicates the procedure of frogs passing though the wetland and foraging deeds. Set of virtual frogs alienated into numerous groups known as “memeplexes”. Frog’s position’s turn out to be closer in every memeplex after few optimization runs and certainly, this crisis direct to premature convergence. In the proposed Enhanced Frog Leaping Algorithm (EFLA) the most excellent frog information is used to augment the local search in each memeplex and initiate to the exploration bound acceleration. To advance the speed of convergence two acceleration factors are introduced in the exploration plan formulation. Proposed Enhanced Frog Leaping Algorithm (EFLA) has been tested in standard IEEE 14,300 bus test system and simulation results show the projected algorithm reduced the real power loss considerably.

Optimization of Preparation of Civil Case for Trial

2020 ◽  
Vol 2 ◽  
pp. 24-31
Author(s):  
N. V. Alekseeva ◽  
◽  
L. N. Pavlova ◽  
Keyword(s):  
Legal Regulation ◽  
Practical Significance ◽  
The Real ◽  
Civil Case ◽  
Practical Recommendations

The article is devoted to the issue of increasing the efficiency and achieving the real practical significance of the stage of preparation of a civil case for trial in civil and arbitration proceedings. The authors draw conclusions about the need for widespread use at this stage of the obligation as a means of legal regulation and more stringent structuring and regulation of training. Practical recommendations for improving procedural legislation in terms of regulation of this stage are offered.

Dynamic Effect Simulation of Snow Falling Based on Particle System

2014 ◽  
Vol 651-653 ◽  
pp. 1840-1843
Author(s):  
Ying Ying Yin
Keyword(s):  
Particle System ◽  
Dynamic Effect ◽  
It Use ◽  
The Real ◽  
Real Effects ◽  
Simulation Results ◽  
Natural Characteristics ◽  
Calculated Model

To simulate snow falling scene dynamically, a method based on particle system is presented to simulate snow falling effects, it use calculated model to simulate the real effects of snow falling in the basis of snow natural characteristics. The simulation results have proven that the proposed method is more effective for simulating snow falling with realistic effects.

Cyclic Stability of Supercapacitors: Materials, Energy Storage Mechanism, Test Methods, and Device

2021 ◽  
Author(s):  
Qianghong Wu ◽  
Tianqi He ◽  
Yikai Zhang ◽  
Junlei Zhang ◽  
Zhijun Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Density ◽  
Test Methods ◽  
Cycle Life ◽  
Cyclic Stability ◽  
The Real ◽  
Storage Mechanism ◽  
Long Cycle ◽  
Long Cycle Life ◽  
Higher Power

Supercapacitors, also known as electrochemical capacitors, have attracted more and more attentions in recent decades due to their advantages of higher power density and long cycle life. For the real...

scholarly journals General principles of ground of efficiency of informatively-measuring technologies in the process of exploitation of objects of the real estate

2021 ◽  
Vol 41 (I) ◽  
pp. 74-85
Author(s):  
P. HRYHOROVSKYI ◽  
◽  
N. CHUKANOVA ◽  
YU. KROSHKA ◽  
I. OSADCHA ◽  
...  
Keyword(s):  
Life Cycle ◽  
Real Estate ◽  
Technical Condition ◽  
Comparative Assessment ◽  
Practical Significance ◽  
Labor Costs ◽  
Repair Work ◽  
The Real ◽  
The Real Estate ◽  
Instrumental Measurement

Aim of this work – to set forth general principles of ground of efficiency of informatively-measuring technologies in the process of exploitation of objects of the real estate. Methodology. The method of substantiating the effectiveness of the restoration of the technical condition of real estate in the process of their operation is based on the use of information and measurement technologies to establish the technical condition of the object, which is a combination of information retrieval methods, instrumental measurement, analysis and processing of such information, technological and technical solutions to ensure the operational suitability of the facility in conditions of uncertainty. The method involves the formation of a repair strategy using information and measurement technologies based on the development of the life cycle of repairs and algorithms for selecting options for instrumental monitoring systems, choosing the procedure for studying the duration of measurement work, justification of labor and information technology costs and comparative assessment of total costs of real estate object. Results. It is established that measuring works are an integral part of the process of operation and repair work in its composition, which are carried out according to a single schedule of operation of the building and are part of repair work, and the frequency and volume of measuring, including geodetic work correlate with. To plan the volume of measuring work, their duration and labor costs are determined on the basis of existing time norms, and in their absence – by methods of technical rationing. Substantiation of the effectiveness of information and measurement technologies in the operation of real estate is performed by comparative assessment of total costs during the operational stage of its life cycle, taking into account the costs of implementing information and measurement technologies, that is the set of processes for obtaining information by instrumental measurement and processing ‘effective conclusion on the technical condition of the property. The scientific novelty of the obtained results is in the development of general principles for substantiating the effectiveness of information and measurement technologies in the operation of real estate. The practical significance lies in the improvement of standard solutions for the choice of composition and content of information and measurement technologies, taking into account their impact on the duration and labor costs of all types of repairs and reconstruction.

scholarly journals Real-Time Human in the Loop MBS Simulation in the Fraunhofer Robot-Based Driving Simulator

2014 ◽  
Vol 61 (2) ◽  
pp. 270-285 ◽  
Author(s):  
Michael Kleer ◽  
Andrey Gizatullin ◽  
Klaus Dreßler ◽  
Steffen Müller
Keyword(s):  
Real Time ◽  
Driving Simulator ◽  
Practical Significance ◽  
Time Model ◽  
Test Drive ◽  
The Real ◽  
Transport Delay ◽  
Human In The Loop ◽  
Acceleration Signal ◽  
Time Calculation

Abstract The paper encompasses the overview of hardware architecture and the systems characteristics of the Fraunhofer driving simulator. First, the requirements of the real-time model and the real-time calculation hardware are defined and discussed in detail. Aspects like transport delay and the parallel computation of complex real-time models are presented. In addition, the interfacing of the models with the simulator system is shown. Two simulator driving tests, including a fully interactive rough terrain driving with a wheeled excavator and a test drive with a passenger car, are set to demonstrate system characteristics. Furthermore, the simulator characteristics of practical significance, such as simulator response time delay, simulator acceleration signal bandwidth obtained from artificial excitation and from the simulator driving test, will be presented and discussed.

scholarly journals Comparison and analysis of calculation of Bridge backwater based on Mike21 hydrodynamic model

2021 ◽  
Vol 233 ◽  
pp. 03043
Author(s):  
Jiang Chuan Liu ◽  
Zhu Qiu Hu ◽  
Mao Yuan Zhu
Keyword(s):  
Theoretical Basis ◽  
Impact Analysis ◽  
Navier Stokes ◽  
Efficiency Coefficient ◽  
Navier Stokes Equation ◽  
The Real ◽  
Comparison And Analysis ◽  
Simulation Results ◽  
The Difference ◽  
Local Water

The construction of bridges and other structures across the river will affect the flood discharge capacity and local water potential of the river.Based on navier-Stokes equation of MIKE21FM hydrodynamic module, this paper carries out two-dimensional numerical simulation of part of Shixi River. By optimizing the grid near the piers to reduce the difference brought by the terrain generalized grid of the real river, it simulates and analyzes the length of the curve of yong-high and Yong-water under different flood frequencies,the Nash-Sutcliffe efficiency coefficient and relative error analysis are used to verify the rationality of the results. The simulation results can accurately reflect the real changes of river water level, It provides a theoretical basis for flood impact analysis.

scholarly journals ENHANCED SPIDER ALGORITHM FOR MINIMIZATION OF REAL POWER LOSS

2018 ◽  
Vol 6 (4) ◽  
pp. 301-311
Author(s):  
K. Lenin
Keyword(s):  
Power Loss ◽  
Reactive Power ◽  
High Quality ◽  
Quality Performance ◽  
Real Power ◽  
Social Spiders ◽  
The Real ◽  
Spider Web ◽  
Simulation Results ◽  
Power Problem

In this paper Enhanced Spider (ES) algorithm is proposed to solve reactive power Problem. Enthused by the spiders, a new Enhanced Spider (ES) algorithm is utilized to solve reactive power problem. The composition is primarily based on the foraging approach of social spiders, which make use of of the vibrations spread over the spider web to choose the position of prey. The simulation results demonstrate high-quality performance of Enhanced Spider (ES) algorithm in solving reactive power problem.  The projected Enhanced Spider (ES) algorithm has been tested in standard IEEE 57,118 bus systems and compared to other reported standard algorithms. Results show that Enhanced Spider (ES) algorithm is more efficient than other algorithms in reducing the real power loss.

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