The effect analysis of the stiffness changes of a Traditional Fishing Boat Foundation on Vibration Amplitude

Teknik ◽  
2021 ◽  
Vol 42 (1) ◽  
pp. 71-78
Author(s):  
Debby Raynold Lekatompessy
Keyword(s):  
Vibration Amplitude ◽  
Allowable Limit ◽  
Effect Analysis ◽  
Machine Foundation ◽  
Fishing Boat ◽  
Vibration Parameters ◽  
Traditional Fishing ◽  
Rubber Damper ◽  
Engine Type ◽  
Observation Results

The ship with the outboard engine is intended to make it easier for fishers to operate and maintain. However, the magnitude of the vibration due to the excitation of the engine during operation adversely affects the surrounding structures. It is evidenced by measuring the vibration amplitude of more than 0.02 mm at several points around the ship engine foundation. This study aims to reduce these vibrations by changing the canal's dimensions as a foundation and using damping rubber as the simplest solution. The analysis was carried out by calculating the vibration parameters of 2 types of machines, SR1110 and S1100. The numerical method is used to calculate the vibration's amplitude by varying the value of channel stiffness and rubber damping on the machine foundation. Supporting data is obtained by measuring the vibration amplitude at several points around the foundation. The magnitude of the previous vibration amplitude is 0.078 mm for the SR1110 type and 0.069 mm for the S1100 type, which exceeds the limit still. The amplitude is reduced by changing the foundation's dimensions and using a rubber damper (c). With the new foundation dimensions, the amplitude for the diesel engine type SR1110 becomes 0.0245 mm and type S1100 becomes 0.0238 mm. Increased stiffness and the addition of rubber succeeded in reducing the vibration amplitude by a significant value. The amplitude was reduced by 69% for the SR1110 engine type and 65% for the S1100 engine type within the allowable limit of less than 0.02 mm to 0.03 mm based on Barkan's observation results.

scholarly journals Underwater Noise for a Variety of Traditional Fishing Boats in Cilacap Waters, Indonesia

2021 ◽  
Author(s):  
Amron Amron ◽  
Rizqi Rizaldi Hidayat ◽  
Maria Dyah Nur Meinita ◽  
Mukti Trenggono
Keyword(s):  
Noise Intensity ◽  
Noise Pollution ◽  
Underwater Noise ◽  
Main Contributor ◽  
Fishing Boat ◽  
Noise Characteristics ◽  
Noise Frequency ◽  
Traditional Fishing ◽  
Engine Type ◽  
Broadband Frequency

Abstract As the main contributor to noise pollution in Cilacap waters, the noise characteristics of traditional fishing boats based on distance are very important to be studied. This research aimed to determine noise intensity and frequency based on the distance for each traditional fishing boat (3, 5, and 10 GT). The results showed that these boats emitting noise with broadband frequency and receive levels reached 153 dB re 1 μPa. The noise characteristics were different for each type of ship due to differences in the size, engine type, and operational speed. The receive level had the same decreased pattern based on the distance for each noise frequency, but with a different intensity. Meanwhile, the noise frequency had increased quadratically based on the distance, where the higher frequency, the greater change so that the noise was not detected faster.

scholarly journals Vibration parameters measuring system of rotate mechanical based on MEMS sensor

2018 ◽  
Vol 189 ◽  
pp. 11004
Author(s):  
Jun Chen ◽  
Tao Zhou
Keyword(s):  
Mathematical Modeling ◽  
Noise Reduction ◽  
Vibration Amplitude ◽  
Micro Electro Mechanical System ◽  
Measuring System ◽  
Vibration Parameter ◽  
System Technology ◽  
Mems Sensor ◽  
Vibration Parameters ◽  
Micro Accelerometer

In this work, a novel vibration parameter measure instrument of rotate machine using a accelerometer is proposed. The ADXL203 micro accelerometer is used as the sensor of the instrument based on the MEMS (Micro Electro Mechanical System) technology. The mathematical modeling of the vibration is finished by the simple harmonic vibration theory. The noise of the system is disposed by the differential noise reduction circuit. The experiments such as differential noise reduction, frequency and vibration amplitude measurement are finished on the platform. The results indicate that the instrument is useful and effective.

Hull Characteristics of 3 GT Traditional Fishing Boat with Additional Fins Installment

2018 ◽  
Vol 24 (12) ◽  
pp. 9552-9555
Author(s):  
Budhi Santoso ◽  
Romadhoni ◽  
M Ikhsan
Keyword(s):  
Fishing Boat ◽  
Traditional Fishing

Numerical Simulation of Vibration Pressure on the Hydraulic Performance of Round-Flow Emitter

2014 ◽  
Vol 1073-1076 ◽  
pp. 2205-2209
Author(s):  
Wei Cao ◽  
Jie Liu ◽  
Yue Ting Zhu ◽  
Qing Song Wei ◽  
Yu Sheng Shi
Keyword(s):  
Vibration Amplitude ◽  
Vibration Mode ◽  
Orthogonal Experiment ◽  
Hydraulic Performance ◽  
Hydraulic Pressure ◽  
Vibration Modes ◽  
Working Pressure ◽  
Vibration Period ◽  
Vibration Parameters ◽  
Better Than

Conventional drip irrigation systems are working under constant working pressure, but the core component emitter is prone to clogging. Round-flow emitter is selected as the research object. Computational fluid dynamics software FLUENT 6.3 is applied to simulate the hydraulic performance of the round-flow emitter under the condition of vibration pressure. Vibration modes are selected as the sine waveform, triangular waveform and rectangle waveform. Three vibration parameters such as basic pressure, vibration period and vibration amplitude are taken as the factors to design the orthogonal experiment. Simulation results show that, water fluctuation and energy dissipation of round-flow emitter in vibration mode are better than that of constant pressure. The combination of basic hydraulic pressure 8m, vibration period 72s, vibration amplitude 6m is the optimal vibration parameters. The research of this paper provides a certain reference for selecting the vibration parameters of the vibration mode.

A Review Paper of Sea-Water Ice Slurry Generator and its Application on Indonesian Traditional Fishing

2013 ◽  
Vol 388 ◽  
pp. 128-132 ◽  
Author(s):  
Agus Sunjarianto Pamitran ◽  
Helmi Dadang Ardiansyah ◽  
Mach Novviali
Keyword(s):  
Review Paper ◽  
Sea Water ◽  
Ice Slurry ◽  
Water Ice ◽  
Fishing Boat ◽  
Traditional Fishing

Sea-water ice slurry generator is aimed to produce ice-slurry using sea-water while fishing on boat. Some models of ice slurry generator have been researched and developed. Indonesia as an archipelago and maritime nation has big potential in fishery. Appropriate model for Indonesian traditional fishing boat is necessary. The most important part of ice slurry generator is evaporator, including auger and scrapper. Some studies on ice slurry are presented in this review paper in order to get larger view on design of ice slurry generator.

Tribological properties of surface topography in ultrasonic vibration-assisted grinding of zirconia ceramics

2017 ◽  
Vol 232 (22) ◽  
pp. 4203-4215
Author(s):  
Zhihua Li ◽  
Kan Zheng ◽  
Wenhe Liao ◽  
Xingzhi Xiao
Keyword(s):  
Friction Coefficient ◽  
Surface Topography ◽  
Ultrasonic Vibration ◽  
Tribological Properties ◽  
Vibration Amplitude ◽  
Spindle Speed ◽  
Zirconia Ceramics ◽  
Significant Difference ◽  
Vibration Parameters ◽  
Ultrasonic Vibration Assisted Grinding

In order to clarify the friction phenomenon of zirconia ceramics in the dental prosthodontics, tribological properties of surface topography in ultrasonic vibration-assisted grinding (UVAG) are studied in this work. The mechanism of material removal is researched to introduce the discontinuous grooves in UVAG theoretically. The UVAG experiments are conducted on zirconia ceramics. Through investigating and comparing experimental results, it is found that UVAG surface has better tribological properties compared with diamond grinding surface. 3D surface roughnesses of UVAG surface are improved when suitable spindle speed, large feed, small cutting depth, and large vibration amplitude are adopted. Surface topography in UVAG changes from thorn scaly to discontinuous shallow furrow when feed increases and spindle speed decreases. The discontinuous grooves are most apparent when vibration amplitude is maximum. Furthermore, the friction coefficient is experimentally studied. The results indicate that there is no significant difference among all the friction coefficients in UVAG. Proper cutting and vibration parameters can improve the average friction coefficient.

Vortex Induced Vibration Numerical Simulation of a Spring-Mounted Cylinder in Current

2011 ◽  
Vol 368-373 ◽  
pp. 1355-1358
Author(s):  
Shang Mao Ai ◽  
Li Ping Sun ◽  
Jing Chen
Keyword(s):  
Numerical Simulation ◽  
Numerical Method ◽  
Phase Angle ◽  
Vibration Amplitude ◽  
Loose Coupling ◽  
Lower Branch ◽  
Courant Number ◽  
Time Step ◽  
Effect Analysis ◽  
Coupling Algorithms

A 2D CFD numerical method based on loose coupling algorithms was adopted to simulate vortex induce vibration of a spring-mounted cylinder. As the accuracy and reliability were focused, the effect analysis of time-step was applied to three typical reduced velocities, which was represented initial branch, upper branch and lower branch respectively. Under the effective courant number, there exist a time-step which would lead to the highest efficiency and the best match for experiment. Because of the limit of RANS method, the predicted vibration amplitude at the upper branch would be lower than experiment value, while the phase angle is sensitive to time step.

scholarly journals Influence of Vibration Amplitude Oscillations on the Conical Sieve Suspended

2012 ◽  
Vol 69 (1) ◽  
Author(s):  
Dorel STOICA ◽  
Gheorghe VOICU ◽  
Carmen RUSÄ‚NESCU
Keyword(s):  
Working Conditions ◽  
Vibration Amplitude ◽  
Oscillation Amplitude ◽  
Agricultural Products ◽  
Experimental Investigations ◽  
First Line ◽  
Experimental Stand ◽  
Vibration Parameters ◽  
Seed Growing

n this paper, the oscillation amplitude is determined by the influence of vibration of conical sieve with experimental measurements for both experimental stand. Experimental investigations have been conducted so that phenomena captured oscillating movement (vibration) of the conical sieve as equipment for processing agricultural products bound for the separation of impurities from mixtures of seeds, and sorting (sizing) to obtain seeds sown material with uniform characteristics and seed growing, as a first line of research. Followed the experimental determination of vibration parameters conical sieve suspended in different working conditions, and different amplitudes of oscillation sieve.

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