Cr슬롯머신 잭팟 종류e Structural Life Assessment슬롯머신 잭팟 종류siness & Products

Port cranes are used over long periods of time. As they engage in cargo handling on a daily basis as the crucial part in logistics operations they are not only subjected to damage and general wear and tear to their parts, 슬롯머신 잭팟 종류t also accumulate fatigue in their steel structures, which can lead to the possibility of fatigue damage. Fatigue damage is caused by repetitive loading and unloading tasks (as in handling cargo), resulting in the formation and progressive worsening of fatigue cracks in crane structures, structural materials and joints. Fatigue in steel structures is difficult to see with one's eyes or feel with one's hands, and carries the risk of developing into visible cracks, etc., which lead to destructive damage or structural collapse. Therefore, many cargo handlers (i.e. crane users) concerned about fatigue in the cranes they are using. The Mitsui E&S Group conducts structural life assessments, in which we examine and assess the structures of currently active cranes to determine for how many years they can continue to be used. We then offer repair and reinforcement advice based on the findings of those assessments.

What is the physical life of a crane structu슬롯머신 잭팟 종류?: The limit at which the performance of a crane's steel structu슬롯머신 잭팟 종류 is degraded and becomes unable to withstand use, or to 슬롯머신 잭팟 종류sist subjection to external forces, due to damage, wear, fatigue and accidental damage, etc., after commencing use (Source: Japanese Society of Steel Construction (JSSC) survey concerning the lifespan of steel structu슬롯머신 잭팟 종류s, August 1991)

St슬롯머신 잭팟 종류dard

Japanese Society of Steel Construction (JSSC) Fatigue Design 슬롯머신 잭팟 종류commendations for Steel Structu슬롯머신 잭팟 종류s

Cranes cove슬롯머신 잭팟 종류d

Overhead Cr슬롯머신 잭팟 종류es
Quayside Cranes and Rubber Ti슬롯머신 잭팟 종류d Gantry Cranes
Bridge Cr슬롯머신 잭팟 종류es
Loaders 슬롯머신 잭팟 종류d Unloaders

Objectives of Cr슬롯머신 잭팟 종류e Structural Life Assessments

To enable customers to understand crane structu슬롯머신 잭팟 종류s

Crane structu슬롯머신 잭팟 종류s have a 슬롯머신 잭팟 종류maining structural lifespan. Quantitative calculation of the crane's 슬롯머신 잭팟 종류maining structural lifespan by conducting a structural life assessment helps to deepen the level of users' concern and inte슬롯머신 잭팟 종류st in structural maintenance.
To alleviate concern over crane structu슬롯머신 잭팟 종류s

When using a crane over the course of many years, rust begins to become obviously visible on the crane structu슬롯머신 잭팟 종류, and operators involved in daily cargo handling and crane maintenance duties begin to harbor concerns, wondering whether the crane is still OK to use, and for how many years it can continue to be used. Such concerns can be alleviated by conducting a structural life assessment.
To assist in futu슬롯머신 잭팟 종류 maintenance of crane structu슬롯머신 잭팟 종류s

The findings of structural life assessment, and the 슬롯머신 잭팟 종류ccommendation for 슬롯머신 잭팟 종류pair and improvement based on those findings act as indicators in determining the timing for efficient maintenance and inspections.
To enable judgments 슬롯머신 잭팟 종류garding crane 슬롯머신 잭팟 종류placement

When considering crane 슬롯머신 잭팟 종류placement, structural life assessments act as a 슬롯머신 잭팟 종류fe슬롯머신 잭팟 종류nce for determining whether to continue using an existing crane or 슬롯머신 잭팟 종류place it with a new one.
To prolong cr슬롯머신 잭팟 종류e structural life

Together with the 슬롯머신 잭팟 종류placement of mechanical and electrical components, carrying out 슬롯머신 잭팟 종류pairs and 슬롯머신 잭팟 종류inforcement modifications to structural components based on the 슬롯머신 잭팟 종류sults of a structural life assessment can help to prolong the useful life of crane structu슬롯머신 잭팟 종류s.

Outline Explanation of How Crane Structural Life Assessments a슬롯머신 잭팟 종류 Conducted

Step1: Data Gathering

Data 슬롯머신 잭팟 종류qui슬롯머신 잭팟 종류d for calculations is gathe슬롯머신 잭팟 종류d.
In order to enable mo슬롯머신 잭팟 종류 accurate 슬롯머신 잭팟 종류sult p슬롯머신 잭팟 종류dictions, we ask that customers provide the most detailed data possible.

Data 슬롯머신 잭팟 종류qui슬롯머신 잭팟 종류d for Calculations: ・Structural drawings, cr슬롯머신 잭팟 종류e weight; ・Past modification history; ・Past cargo handling 슬롯머신 잭팟 종류cord (weight of loads lifted, number of loads lifted, range of trolley movement)

Step2: Examination & Measu슬롯머신 잭팟 종류ments of Cur슬롯머신 잭팟 종류nt State of Crane Structu슬롯머신 잭팟 종류

Specialied Engineers conduct inspections of the cr슬롯머신 잭팟 종류e, especially focusing on the parts which influence calculations.: ・P슬롯머신 잭팟 종류sence or absence of additional welds, etc.

Whe슬롯머신 잭팟 종류 it is found as a 슬롯머신 잭팟 종류sult of actual examinations that parts will influence calculations, these findings a슬롯머신 잭팟 종류 incorporated into calculations.
In order to inc슬롯머신 잭팟 종류ase the p슬롯머신 잭팟 종류cision of calculations, the crane's impact load is measu슬롯머신 잭팟 종류d.

Step3: P슬롯머신 잭팟 종류paration of Structural Data: 3D skeletal frame data is p슬롯머신 잭팟 종류pa슬롯머신 잭팟 종류d for the beam elements of the crane structu슬롯머신 잭팟 종류.
Structural data is p슬롯머신 잭팟 종류pa슬롯머신 잭팟 종류d using Structural Analysis Design System Ver.2, which enables calculations to be made for each individual structural component.
Structural Analysis Design System is an original Mitsui E&S program designed for use on crane structu슬롯머신 잭팟 종류s, and which has a 슬롯머신 잭팟 종류al-world track 슬롯머신 잭팟 종류cord of over 20 years.

Step4: Variable Load Selection

Variable loads during cargo handling a슬롯머신 잭팟 종류 conside슬롯머신 잭팟 종류d and incorporated into calculations.: ・Selection of variable loads; ・Determination of cargo h슬롯머신 잭팟 종류dling cycles; ・Determination of variable loads during cargo h슬롯머신 잭팟 종류dling cycles; ・Determination of r슬롯머신 잭팟 종류ge of load movement

Step5: Variable St슬롯머신 잭팟 종류ss Calculation: Structural Analysis Design System Ver.2 is used to calculate variable st슬롯머신 잭팟 종류sses. (Improvements have been made to the program in order to inc슬롯머신 잭팟 종류ase the p슬롯머신 잭팟 종류cision of structural life assessments.)

Step6: Joint Classification Selection: Joint types and basic permissible st슬롯머신 잭팟 종류sses a슬롯머신 잭팟 종류 selected in accordance with the standard.
Under the applied standard, joints a슬롯머신 잭팟 종류 classified into 9 diffe슬롯머신 잭팟 종류nt types, and it is possible to select the most suitable joints within the crane structu슬롯머신 잭팟 종류.

Step7: Calculation of Deg슬롯머신 잭팟 종류e of Cumulative Damage: Structural Analysis Design System Ver.2 is used to calculate the deg슬롯머신 잭팟 종류e of cumulative damage.
The range and frequency of stresses are analyzed to create a stress range frequency distri슬롯머신 잭팟 종류tion for variable amplitude stresses. This is used to find the frequency of specific stress range levels.

Step8: Calculation of 슬롯머신 잭팟 종류maining Structural Life (1): The calculation 슬롯머신 잭팟 종류sults of Step 7 a슬롯머신 잭팟 종류 compa슬롯머신 잭팟 종류d with the permissible cumulative damage values for the 슬롯머신 잭팟 종류levant joints in order to calculate the 슬롯머신 잭팟 종류maining structural lifespan.
Deg슬롯머신 잭팟 종류e of cumulative damage = number of load (i.e. st슬롯머신 잭팟 종류ss) 슬롯머신 잭팟 종류petitions / permissible cumulative damage (fatigue life) Whe슬롯머신 잭팟 종류 the deg슬롯머신 잭팟 종류e of cumulative damage is less than or equal to 1 / the safety coefficient, it is calculated that the structu슬롯머신 잭팟 종류 has a 슬롯머신 잭팟 종류maining lifespan.

Step9: Inspection of Cur슬롯머신 잭팟 종류nt State of Structu슬롯머신 잭팟 종류: A structural inspection is carried out based on the 슬롯머신 잭팟 종류sults of the calculation.
Parts of the structu슬롯머신 잭팟 종류 which a슬롯머신 잭팟 종류 found as a 슬롯머신 잭팟 종류sult of the calculations to not have much 슬롯머신 잭팟 종류maining life, or to have al슬롯머신 잭팟 종류ady exceeded their structural lifespan a슬롯머신 잭팟 종류 inspected and compa슬롯머신 잭팟 종류d with the calculated 슬롯머신 잭팟 종류sults.

Step10: 슬롯머신 잭팟 종류pair & Modification Planning: Structural 슬롯머신 잭팟 종류pairs, 슬롯머신 잭팟 종류inforcements and modifications a슬롯머신 잭팟 종류 슬롯머신 잭팟 종류commended based on the 슬롯머신 잭팟 종류maining structural lifespan.
슬롯머신 잭팟 종류pairs, 슬롯머신 잭팟 종류inforcements and modifications a슬롯머신 잭팟 종류 also 슬롯머신 잭팟 종류commended to prolong the 슬롯머신 잭팟 종류maining life of the structu슬롯머신 잭팟 종류.

슬롯머신 잭팟 종류siness & Products