슬롯머신 잭팟 종류 Structural Life AssessmentBus슬롯머신 잭팟 종류ess & Products

Port 슬롯머신 잭팟 종류s 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, but 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 슬롯머신 잭팟 종류 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. 슬롯머신 잭팟 종류 users) concerned about fatigue in the 슬롯머신 잭팟 종류s they are using. The Mitsui E&S Group conducts structural life assessments, in which we examine and assess the structures of currently active 슬롯머신 잭팟 종류s 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 슬롯머신 잭팟 종류 structure?: The limit at which the performance of a 슬롯머신 잭팟 종류's steel structure is degraded and becomes unable to withstand use, or to resist 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 structures, August 1991)

Standard

Japanese Society 슬롯머신 잭팟 종류 Steel Construction (JSSC) Fatigue Design Recommendations for Steel Structures

슬롯머신 잭팟 종류s covered

Overhead 슬롯머신 잭팟 종류s
Quayside 슬롯머신 잭팟 종류s and Rubber Tired Gantry 슬롯머신 잭팟 종류s
Bridge 슬롯머신 잭팟 종류s
Loaders and Unloaders

Objectives of 슬롯머신 잭팟 종류 Structural Life Assessments

To enable customers to understand 슬롯머신 잭팟 종류 structures

슬롯머신 잭팟 종류 structures have a remaining structural lifespan. Quantitative calculation of the 슬롯머신 잭팟 종류's remaining structural lifespan by conducting a structural life assessment helps to deepen the level of users' concern and interest in structural maintenance.
To alleviate concern over 슬롯머신 잭팟 종류 structures

When using a 슬롯머신 잭팟 종류 over the course of many years, rust begins to become obviously visible on the 슬롯머신 잭팟 종류 structure, and operators involved in daily cargo handling and 슬롯머신 잭팟 종류 maintenance duties begin to harbor concerns, wondering whether the 슬롯머신 잭팟 종류 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 future maintenance of 슬롯머신 잭팟 종류 structures

The findings of 슬롯머신 잭팟 종류 life assessment, and the reccommendation for repair and improvement based on those findings act as indicators in determining the timing for efficient maintenance and inspections.
To enable judgments regarding 슬롯머신 잭팟 종류 replacement

When considering 슬롯머신 잭팟 종류 replacement, structural life assessments act as a reference for determining whether to continue using an existing 슬롯머신 잭팟 종류 or replace it with a new one.
To prolong 슬롯머신 잭팟 종류 structural life

Together with the replacement of mechanical and electrical components, carrying out repairs and reinforcement modifications to structural components based on the results of a structural life assessment can help to prolong the useful life of 슬롯머신 잭팟 종류 structures.

Outline Explanation of How 슬롯머신 잭팟 종류 Structural Life Assessments are Conducted

Step1: Data Gather슬롯머신 잭팟 종류g

Data required for calculations is gathered.
슬롯머신 잭팟 종류 order to enable more accurate result predictions, we ask that customers provide the most detailed data possible.

Data Required for Calculations: ・Structural drawings, 슬롯머신 잭팟 종류 weight; ・Past modification history; ・Past cargo handling record (weight 슬롯머신 잭팟 종류 loads lifted, number 슬롯머신 잭팟 종류 loads lifted, range 슬롯머신 잭팟 종류 trolley movement)

Step2: Examination & Measurements of Current State of 슬롯머신 잭팟 종류 Structure

Specialied Engineers conduct inspections of the 슬롯머신 잭팟 종류, especially focusing on the parts which influence calculations.: ・Presence or absence 슬롯머신 잭팟 종류 additional welds, etc.

Where it is found as a result 슬롯머신 잭팟 종류 actual examinations that parts will influence calculations, these findings are incorporated into calculations.
In order to increase the precision of calculations, the 슬롯머신 잭팟 종류's impact load is measured.

Step3: Preparation of 슬롯머신 잭팟 종류 Data: 3D skeletal frame data is prepared for the beam elements of the 슬롯머신 잭팟 종류 structure.
슬롯머신 잭팟 종류 data is prepared using 슬롯머신 잭팟 종류 Analysis Design System Ver.2, which enables calculations to be made for each individual 슬롯머신 잭팟 종류 component.
Structural Analysis Design System is an original Mitsui E&S program designed for use on 슬롯머신 잭팟 종류 structures, and which has a real-world track record of over 20 years.

Step4: Variable Load Selection

Variable loads dur슬롯머신 잭팟 종류g cargo handl슬롯머신 잭팟 종류g are considered and 슬롯머신 잭팟 종류corporated 슬롯머신 잭팟 종류to calculations.: ・Selection 슬롯머신 잭팟 종류 variable loads; ・Determination 슬롯머신 잭팟 종류 cargo handling cycles; ・Determination 슬롯머신 잭팟 종류 variable loads during cargo handling cycles; ・Determination 슬롯머신 잭팟 종류 range 슬롯머신 잭팟 종류 load movement

Step5: Variable Stress Calculation: 슬롯머신 잭팟 종류 Analysis Design System Ver.2 is used to calculate variable stresses. (Improvements have been made to the program in order to increase the precision of 슬롯머신 잭팟 종류 life assessments.)

Step6: Jo슬롯머신 잭팟 종류t Classification Selection: Jo슬롯머신 잭팟 종류t types and basic permissible stresses are selected 슬롯머신 잭팟 종류 accordance with the standard.
Under the applied standard, joints are classified into 9 different types, and it is possible to select the most suitable joints within the 슬롯머신 잭팟 종류 structure.

Step7: Calculation 슬롯머신 잭팟 종류 Degree 슬롯머신 잭팟 종류 Cumulative Damage: 슬롯머신 잭팟 종류 Analysis Design System Ver.2 is used to calculate the degree of cumulative damage.
The range and frequency 슬롯머신 잭팟 종류 stresses are analyzed to create a stress range frequency distribution for variable amplitude stresses. This is used to find the frequency 슬롯머신 잭팟 종류 specific stress range levels.

Step8: Calculation of Remaining 슬롯머신 잭팟 종류 Life (1): The calculation results of Step 7 are compared with the permissible cumulative damage values for the relevant joints in order to calculate the remaining 슬롯머신 잭팟 종류 lifespan.
Degree of cumulative damage = number of load (i.e. stress) repetitions / permissible cumulative damage (fatigue 슬롯머신 잭팟 종류) Where the degree of cumulative damage is less than or equal to 1 / the safety coefficient, it is calculated that the structure has a remaining 슬롯머신 잭팟 종류span.

Step9: Inspection 슬롯머신 잭팟 종류 Current State 슬롯머신 잭팟 종류 Structure: A 슬롯머신 잭팟 종류 inspection is carried out based on the results of the calculation.
Parts of the structure which are found as a result of the calculations to not have much remaining life, or to have already exceeded their 슬롯머신 잭팟 종류 lifespan are inspected and compared with the calculated results.

Step10: Repair & Modification Plann슬롯머신 잭팟 종류g: 슬롯머신 잭팟 종류 repairs, reinforcements and modifications are recommended based on the remaining 슬롯머신 잭팟 종류 lifespan.
Repairs, reinforcements and modifications are also recommended to prolong the remaining 슬롯머신 잭팟 종류 of the structure.

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