scholarly journals Study on the strength of a fishing boat made from plastic recycles

2021 ◽  
Vol 328 ◽  
pp. 07002
Author(s):  
Noverdo Saputra ◽  
Budhi Martana ◽  
Fahrudin Noorohmah ◽  
Reda Rizal
Keyword(s):  
Plastic Material ◽  
Plate Thickness ◽  
Ship Design ◽  
Propulsion System ◽  
Maximum Strain ◽  
Profile Shape ◽  
Fishing Boat ◽  
Recycle Plastic ◽  
Load Weight

Ship’s strength is a very significant factor in ship design. In this research, a study of the strength of ships made of recycled plastic material has been carried out. The ship has been designed according to the needs of the load weight, passengers, propulsion system, fishing equipment and the weight of the material itself. Then the load is distributed into the design, where the profile shape and plate thickness used are assumed to be temporary. The strength of the boat analysed, and the minimum plate thickness required in the design is 10 mm with maximum strain The recycle plastic used is type 2 (HDPE).

A Fast Method for the Evaluation of the Dynamic Positioning Capability in Time Domain in the Early Design Stage

2015 ◽  
Author(s):  
Adele Luebcke ◽  
Philip Augener ◽  
Arne Falkenhorst
Keyword(s):  
Time Domain ◽  
Wind Waves ◽  
Ship Design ◽  
Propulsion System ◽  
Design Stage ◽  
Maximum Deviation ◽  
Dynamic Positioning ◽  
Fast Method ◽  
Fast Calculation ◽  
Early Design Stage

Vessels equipped with a Dynamic Positioning (DP) system for station keeping have become quite common on the offshore market. The propulsion system of such ships has the capability to compensate the counteracting environmental forces caused by wind, waves and current. Since the DP capability is an important part of the specification, it is necessary to consider this aspect in the early ship design stage. For this purpose a procedure of a fast calculation method is developed by the authors to predict the limiting environmental conditions and the maximum deviation of the position and the course angle for a pre-established propulsion system.

scholarly journals THE RESISTANCE ASPECT OF FISHING BOAT SKIPJACK POLE AND LINE

2021 ◽  
Vol 4 ◽  
pp. 1-7
Author(s):  
Wolter R Hetharia ◽  
Eliza R De Fretes ◽  
Reico H Siahainenia
Keyword(s):  
Model Test ◽  
Ship Design ◽  
Full Scale ◽  
Suitable Method ◽  
Design Phase ◽  
Towing Tank ◽  
Model Scale ◽  
Fishing Boat ◽  
Fishing Vessels ◽  
The Difference

The operation of fishing vessels skipjack pole and line contributes in catching tuna and skipjack fishes particularly in Indonesian waters. A previous study conducted by the authors found that there was no suitable method provided for the resistance computation atearly ship design phase. Besides, there was aninitial trim existed on the vessel during the operation which contributes for the resistance. The purpose of the study is to find the difference of resistance between the model test and the existing methods. The study was executed also to find the effect of initial trim of the vessel. The study began with collecting the database of a parent ship then to develop and transform into a model-scale for testing purpose in the towing tank. The results of model test were converted to the full-scale vessel. The resistance of full-scale vessel was computed based on the Holtrop and Guldhammer methods. The result of full-of resistance obtained from the model test and the methods were collected, evaluated and compared. The results showed the difference of the resistance for all methods. The result of model test is greater 21 % than that of Holtrop method at the service speed of 10 knots. Meanwhile, the result of model test is lower 14 % than that of Gulhammer method at the same speed. In addition, at the speed of 10 knots the initial trim of 0.5O increase 5 % ofthe resistance, the initial trim of 1O increase 10 % of resistance and the initial trim of 2O increase 16 % of resistance compared to the vesselwithout initial trim. In conclusion, the existing resistance methods are not suitable to be applied for skipjack pole and line fishing vessels. In addition, the initial trim contributes to increase the resistance and should be avoided during the vessel operation.

Dust and Sand Protection for Marine Gas Turbines

1982 ◽  
Vol 104 (2) ◽  
pp. 260-267 ◽  
Author(s):  
M. R. Caskey
Keyword(s):  
Gas Turbine ◽  
Persian Gulf ◽  
Gas Turbines ◽  
Ship Design ◽  
Propulsion System ◽  
Electrical Generator ◽  
Gas Turbine Combustion ◽  
System Designs ◽  
Generator Gas ◽  
The U.S

The newest ship class to enter the U.S. Navy (USN) fleet is the DDG-993 KIDD Class guided missile destroyer. The lead ship of the Class, delivered March 1981, incorporates the main features of the DD 963 Class hull and main propulsion system designs. Originally ordered by the Imperial Iranian Navy (IIN), the ship design also incorporates unique features for protection from dust and sand. The ventilation ducting, deck machinery, and gas turbine combustion air all required modifications to protect against damage due to the expected Persian Gulf environment. This paper will outline the hardware changes considered necessary to meet the requirements for satisfactory IIN performance for the propulsion and electrical generator gas turbines.

Safe Return to Port – Challenges Ahead for Passenger Ship Design

2009 ◽  
Author(s):  
U. Vogler ◽  
A. Ullrich ◽  
D. Povel ◽  
P. Horstmann ◽  
M. Moody
Keyword(s):  
Software Tool ◽  
Ship Design ◽  
Propulsion System ◽  
Passenger Ship ◽  
Passenger Ships ◽  
System Layout

The new SOLAS regulations II-1/8-1, II-2/21 and II-2/22 on safe return to port are introduced; it is demonstrated how the regulations will influence the design of future passenger ships. The requirements on safe areas and on propulsion system layout are discussed with the aid of examples. A software tool supporting the safe return to port assessment is proposed. The tool will assess the degraded performance of essential systems for all relevant casualty cases.

A Study on the Hybrid Propulsion System for Fishing Boat

2008 ◽  
Vol 32 (5) ◽  
pp. 677-683
Author(s):  
Jin-Seok Oh ◽  
Kwan-Jun Jo ◽  
Choung-Hwan Park ◽  
Youn-Jae Ham ◽  
Jun-Ho Kwak ◽  
...  
Keyword(s):  
Propulsion System ◽  
Hybrid Propulsion ◽  
Fishing Boat

Development of Guidance for Leak-Before-Break Analysis for Complex Shaped Cracks

2005 ◽  
Author(s):  
S. F. Yellowlees ◽  
K. M. Lynch ◽  
A. P. Warren ◽  
J. K. Sharples ◽  
P. J. Budden
Keyword(s):  
Flat Plate ◽  
Plastic Material ◽  
Crack Opening ◽  
Plate Thickness ◽  
Mouth Opening ◽  
Crack Mouth Opening Displacement ◽  
Opening Displacement ◽  
Simplified Approach ◽  
Plate Analysis ◽  
Leak Before Break

Within the context of leak-before-break (LbB) methodology, this paper presents results from finite element (FE) analyses of a range of complex through-wall cracks in an infinite flat plate subject to combined primary membrane and secondary bending loads. The aim is to provide a simplified approach for the treatment of converging/diverging cracks in LbB assessments. Expressions have been derived from curve fits to FE results, which allow the calculation of the crack opening area (COA) for a complex crack. This expression is based on the crack mouth opening displacement for a straight fronted crack under membrane loading, with modification factors that take account of the crack shape, section thickness and the level of imposed bending stress. The variation of J through the plate thickness has also been studied. Some of the flat plate analyses have been repeated for a straight crack using elastic-plastic material properties. Elastic values of COA are always found to be conservative (i.e. an underestimate) compared to inelastic values. Elastic analyses of a cylinder containing a circumferential defect have also been carried out. These indicate that the crack opening on the inside wall is generally smaller than the crack opening from the corresponding flat plate analysis.

3080Postsystolic shortening yields novel and independent prognostic information on cardiovascular events and mortality in patients with type 2 diabetes

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
P Brainin ◽  
M T Jensen ◽  
T Biering-Soerensen ◽  
R Moegelvang ◽  
T Fritz-Hansen ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Heart Failure ◽  
Type 2 Diabetes ◽  
Primary Endpoint ◽  
Cardiovascular Events ◽  
Cardiac Cycle ◽  
Secondary Endpoint ◽  
Maximum Strain ◽  
Prognostic Information

Abstract Background Cardiovascular disease is the leading cause of death and disability in patients with type 2 diabetes. We aimed to evaluate if postsystolic shortening, a marker of impaired myocardial function, may provide prognostic information on cardiovascular events and mortality in patients with type 2 diabetes. Method We prospectively studied 783 patients with diabetes type 2 (63% male, age 65 [58, 70] years; HbA1c 54 [48, 65] mmol/mol; diabetes duration 11 [6, 17] years) who underwent speckle tracking echocardiography. Patients with left bundle branch block, atrial fibrillation and a history of heart failure and myocardial infarction were excluded. The primary endpoint was the composite of incident heart failure, myocardial infarction and cardiovascular death. The secondary endpoint was all-cause death. We defined the postsystolic index (PSI) as: [100x (maximum strain in cardiac cycle – peak systolic strain)/ (maximum strain in cardiac cycle)]. Results During the median follow-up of 4.9 years [4.2, 5.3], 87 patients (11%) reached the primary endpoint and 80 (10%) died from any cause. Each 1% increase in the PSI was associated with the primary (HR 1.07 95% CI 1.02–1.13, P<0.001, Fig A) and secondary endpoint (HR 1.09 95% CI 1.04–1.14, P<0.001, Fig B). After adjusting for age, sex, hypertension, smoking, duration of diabetes, cholesterol, eGFR, left ventricular ejection fraction and mass index, E/A-ratio, deceleration time and left atrial volume index, the PSI remained an independent predictor of both endpoints; primary (HR 1.07 per 1% increase 95% CI 1.01–1.14, P=0.028) and secondary endpoint (HR 1.07 per 1% increase, 95% CI 1.01–1.14, P=0.022). PSI and the endpoints Conclusion In patients with type 2 diabetes, assessment of PSI yields novel and independent prognostic information on cardiovascular events and mortality. Hence, PSI may offer guidance on risk stratification in patients with type 2 diabetes.

Perbandingan Desain Dermaga Terapung Pada Sistem Konstruksi Melintang dan Memanjang “Studi Kasus Dermaga Pelabuhan Tideng Pale Kabupaten Tana Tidung”

2018 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Edy Utomo
Keyword(s):  
Optimal Design ◽  
Stress Analysis ◽  
Ship Design ◽  
Propulsion System ◽  
Construction Costs ◽  
Good Strength ◽  
Construction System

Floating port is a barge made of rectangular steel or concrete that can float to adjust the water lavel. Barge is a cargo ship type do not have a propulsion system. So, design of floating port preferably aqual to ship design. There are 3 types of barge construction system, that are longitudinal system, transversal system and mixed construction. To get the optimal design of floating port, comparison of design based on the construction system is needed. Case study in this research ia a Tideng Pale-KTT floating port. Deformation and stress analysis using FEA method on 2 models of construction system, that are transversal and longitudinal. Based on results, both of construction system produce a good strength value. However, there are some construction component which does not match the placement of the construction system. Results of construction costs have 5,51% deviation, longitudinal sytem is more expensive. So, produce the hypotheses to do a combination for both of construction systems.

scholarly journals Eksplorasi material daur ulang kantong plastik dengan teknik origami

2021 ◽  
Vol 4 (1) ◽  
pp. 15-24
Author(s):  
Devanny Gumulya
Keyword(s):  
Plastic Material ◽  
Sheet Material ◽  
Research Result ◽  
Recycle Material ◽  
Recycling Process ◽  
Paper Folding ◽  
Plastic Bag ◽  
New Material ◽  
The One ◽  
Recycle Plastic

Shopping plastic bag is a thermoplastic type LDPE and HDPE, that can be heated with hotpress. Through this recycling process come new material that can used for product material. The recycle plastic material has a lot of potential to be used as a product application. market research From founded many brands that try to recycle plastic still using another new material to give support to the plastic recycle material. Origami is a paper folding art that is commonly known by everyone. The study tried to apply the origami technique on recycled plastic bag material that has been heated with hotpress machine. With origami technique 90% the product can be made with this material entirely without the help of sewing and other materials. This is seen as an opportunity for the market that still use many new materials to support this material. The folding gives construction to the one sheet material and give new function to the recycle plastic material.  The research uses experimental method. Series of paper origami patterns are applied on the recycle material, till founded several folding that can be apply on the recycle plastic sheet material. The research result is a variety of functional products made with origami techniques that have been egistered design industry copy wright. 

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