Strength Analysis and Sea-Fastening Design of Container Crane Structure for Heavy Lifting Sea Transportation

2018 ◽  
Vol 874 ◽  
pp. 147-154
Author(s):  
Wisnu Wardhana ◽  
Yoyok Setyo Hadiwidodo ◽  
Faisal Siswanto
Keyword(s):  
Static Load ◽  
Structural Strength ◽  
High Stress ◽  
Strength Analysis ◽  
Structural Failure ◽  
Container Crane ◽  
Sea Transportation ◽  
Transportation Process ◽  
Selection Of ◽  
Excessive Stress

This paper discusses heavy-lifting sea-transportation of 831-ton container-crane in Indonesia from Surabaya to Kupang. Structural strength analysis is carried out to ensure the safety of the crane during the transportation process. The purpose of this analysis is to design the sea-fastening construction capable of redistributing the excessive stress that might occurred, to avoid structural failure. The first step is to model the crane structure and barge under certain various drafts. This is important because selection of the proper draft will determine the suitable righting moments of barge and hence to ensure good stability. The selected drafts under investigation are taken between 0.25 T to 0.75 T. The result of the structural strength calculation shows that the static load is found around 8150 kN. Loads due to motion of barge for heave, roll, and pitch motions are 116 kN, 7424 kN, and 232kN, respectively. Location of the high stress due to the motion is identified at the bottom of the crane structure so that the design of sea-fastening constructions will be concentrated in the vicinity of this position. The values of Unity Check after fitting the sea-fastening construction are reduced to 0.940, 0.704, and 0.702, respectively. It is concluded that the structure of container crane under such sea-fastening design is proven to be capable of overcoming the loads during transportation process.

Structural Strength Analysis of Ship-to-Shore Crane

2016 ◽  
Vol 858 ◽  
pp. 34-37
Author(s):  
Gang Tang ◽  
Xiong Hu ◽  
Wei Wang ◽  
Tian Hao Tang ◽  
Christophe Claramunt ◽  
...  
Keyword(s):  
Field Test ◽  
Systematic Approach ◽  
Static Load ◽  
Structural Strength ◽  
Working Time ◽  
Strength Analysis ◽  
Testing System ◽  
Signal Conditioning ◽  
Allowable Range

It is necessary to analyze the strength of STS crane with static load for assessing the safety of the STS crane. A case study of a STS crane with 28 ton capacity and 18 years of working time has been conducted. A testing system with signal sensing, signal conditioning, signal acquiring and signal analyzing has been established. After the field test, all the stresses of the test positions have been calculated and the strength of STS crane with static load is in the allowable range. As a result of this study, a systematic approach to analyze the strength of STS crane with static load is proposed.

A Mathematical Model for Competing Failure Modes in Strain Cycle Fatigue

2006 ◽  
Vol 129 (2) ◽  
pp. 293-303 ◽  
Author(s):  
Gerald T. Cashman
Keyword(s):  
Failure Modes ◽  
High Stress ◽  
Local Strain ◽  
Initiation Site ◽  
Weakest Link ◽  
Strain Relationship ◽  
Powder Metallurgy Alloy ◽  
Link Model ◽  
Cyclic Plastic Strain ◽  
Selection Of

Elevated temperature data for powder metallurgy alloy René 95 generated in vacuum are presented to demonstrate that the life differences observed between surface and internally initiated failures are due to an environmental effect. The transition in behavior from a mode at low stress dominated by internal initiations to a surface dominated mode at high stress is quantitatively described in terms of both a weakest-link model and a local strain relationship. A fatigue failure mechanism is provided that explains that the natural selection of initiation site is based upon the concept that the site displaying the highest local cyclic plastic strain is the location where fatigue initiates.

scholarly journals Material Origins of Accelerated Operational Wear of RD-33 Engine Blades

2020 ◽  
Author(s):  
Adam Kozakiewicz ◽  
Stanislaw Jóźwiak ◽  
Przemysław Jóźwiak ◽  
Stanisław Kachel
Keyword(s):  
Chemical Composition ◽  
Construction Material ◽  
Operating Conditions ◽  
Design Stage ◽  
Strength Analysis ◽  
Jet Engine ◽  
Emergency Situations ◽  
Low Pressure Turbine ◽  
Propulsion Unit ◽  
Selection Of

The structural and strength analysis of the material used to construct such an important engine element as the turbine is of great significance, both at the design stage as well as during tests and expertises related to emergency situations. Bearing in mind the conditions above mentioned, the paper presents the results of research on the chemical composition, morphology and phased structure of the metallic construction material used to produce the blades of the high and low pressure turbine of the RD-33 jet engine, which is the propulsion unit of the MiG-29 aircraft. The data obtained as a result of the material tests of the blades allowed, on the basis of the analysis of chemical composition and phased structure, to determine the grade of the alloy used to construct the tested elements of the jet engine turbine. The structural stability of the material was found to be lower in comparison with engine operating conditions, which manifested itself as a clear decrease in the resistance properties of the blade material. The results obtained can be used as a basis for analyzing the life span of an object or a selection of material replacements, which enable to produce the analyzed engine element.

scholarly journals The use of modern plastics for the construction of high speed fluid-flow machinery

Mechanik ◽  
2018 ◽  
Vol 91 (7) ◽  
pp. 508-510
Author(s):  
Grzegorz Żywica ◽  
Tomasz Z. Kaczmarczyk ◽  
Eugeniusz Ihnatowicz
Keyword(s):  
Fluid Flow ◽  
High Speed ◽  
Material Selection ◽  
Metallic Alloys ◽  
Strength Analysis ◽  
Production Time ◽  
Rotor Disk ◽  
Selection Of

Discussed are issues related to the selection of plastics for manufacturing chosen components of high-speed fluid-flow machinery. In addition to discussing the criteria used for material selection, an exemplary strength analysis of a rotor disk made of plastic was presented. The work carried out was aimed at replacing commonly used metallic alloys with modern plastics, which in turn may shorten production time and reduce costs.

scholarly journals KOMPARASI PILIHAN PENGGUNA MODA ANGKUTAN LAUT DI PELABUHAN MUARA ANGKE ANTARA KAPAL DISHUB DAN KAPAL TRADISIONAL

LOGISTIK ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 14-20
Author(s):  
Adi Nursalim ◽  
Tri Mulyono
Keyword(s):  
Service Users ◽  
Quality Service ◽  
Transportation Mode ◽  
Transportation Services ◽  
Factors Affecting ◽  
Sea Transportation ◽  
User Data ◽  
Mode Of Transportation ◽  
Age Range ◽  
Selection Of

The sea transportation mode is a means or tool used by people to move from one place to another. Sea freight mode in DKI Jakara is expected to provide quality service to the users of the transportation services as well as the service users on board, other than that the passenger characteristics strongly affect passengers in choosing Mode of transportation. Based on the user data of traditional vessels majority of the female users differ from the Dishub ship of the majority of male users. The user's age for both ships is the majority of the age range of 21-30 years, including the majority work of students. The level of user earning both traditional and dishub vessels does not differ the majority have not been income according to the type of work. The purpose and frequency of user journeys of traditional vessels and dishub vessels are no different, with the purpose of the majority being a one-time recreation a year. The study aims to determine which variables will result in factors affecting the perpetrators and the probability of selecting the mode located in the Muara Angke port between the Dishub ship and the traditional vessel. Data processing uses the Serqual method to determine the number of samples from the population and SPSS program to find out the factors affecting the selection of the modes of traditional vessels of Dishub and vessels.

A Revisit of Material and Structural Failures

2015 ◽  
Author(s):  
Sheldon Wang
Keyword(s):  
Low Cycle Fatigue ◽  
High Stress ◽  
Engineering Practice ◽  
Material Failure ◽  
Cycle Fatigue ◽  
Structural Failure ◽  
Column Buckling ◽  
Typical Material ◽  
Structural Failures ◽  
To Come

In this paper, we revisit the issues related to material and structural failures. In particular, we employ a similar bridging function between the typical structural failure, the so-called column buckling, and the typical material failure under compression, to link the low stress high cycle and the high stress low cycle fatigue. A part of the intention of this paper is to come up with simple formulas as guidelines in engineering practice for both material and structural failures in both static and dynamic situations.

Structural Strength Analysis and Measurement of Composite Laminate Using Finite Element Method and FBG Sensor

2016 ◽  
Vol 851 ◽  
pp. 720-727
Author(s):  
Yu Chuan Lin ◽  
Wen Jeng Hsueh
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cantilever Beam ◽  
Composite Laminate ◽  
Structural Strength ◽  
Measuring System ◽  
Bending Test ◽  
Strength Analysis ◽  
Fbg Sensor ◽  
Element Method

The aim of this study is to develop structural strength analysis technique and real-time measuring system of composite laminate using finite element method (FEM) and fiber bragg grating (FBG) sensor. A composite laminate of cantilever beam was designed and fabricated using glass fiber reinforced plastic (GFRP) for structural mechanics behavior research. Six design cases of different orientations composite laminate were considered for the better combinations by using FEM program. The bending test of a composite laminate of cantilever beam was performed by using FBG sensor to obtained relationship between strain and displacement. The study result shows that the higher stiffness of composite laminate of cantilever beam was obtained in the [0/90/0/90] orientation. The first natural frequency is 34.83 Hz and corresponding mode shape is bending mode in Z-direction. The FEM and FBG sensor have been successfully used in variety of composite laminate design with different layering sequences by this article.

Strength Analysis of Oil Tanker Under Numerical Wave

2018 ◽  
Author(s):  
Cheng Shu ◽  
Li Hong ◽  
Zhang Dongxu
Keyword(s):  
Structural Strength ◽  
Fluid Structure Interaction ◽  
Ocean Waves ◽  
Wave Action ◽  
Stokes Wave ◽  
Strength Analysis ◽  
Two Phase ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Equivalent Load

The strength of an oil carrier is generally checked using static load or equivalent load of wave action in accordance with relevant specifications. In order to accurately calculate the stress and the deformation of an oil carrier under wave action, the fluid-structure interaction system in the platform Workbench is used in this work. And, the pressure-based solver, the two-phase flow model and UDF (User Defined Function) in the software FLUENT are used to compile the three-order Stokes Wave so as to simulate ocean waves. Forces acting on the surface of the oil carrier are obtained by calculating the flow field, and the structural strength of the carrier is then investigated under sagging and hogging conditions. The results show that: the three-order Stokes Wave matches well with the theoretical result, and it is feasible to research the strength of the oil carrier by generating waves using this numerical method. In addition, the method of fluid-structure interaction is applied to investigate the structural strength of the fully-loaded carrier under sagging and hogging conditions.

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