Examples of Engineering Service
Case for Technical Service (Vibration)
Evaluation on Effects of Vibration of Subway on ○○ Tower in Gangnam
- Fig 1. Perspective of Site
- Fig 2. Measuring and Diagnosing Noise and Vibration of Railroad
- Proposal of Measures against noise and vibration of railroad
The UNI-MAT which is a vibration-proof pad with thickness of 50mm is installed at the wall of underground floors of the newly constructed building. After measures, it satisfies criteria for both vibration and structural noises.
Analysis on Vibration of Water Quality Management System in Haengbok City
- Fig 1. Analysis on Vibration of Water Quality Management System
- Fig 2. Distribution of Indoor Vibration Acceleration
- Fig 3. Distribution of Vibration Acceleration at the Site Boundary
Case for Technical Service (Vibration)
- Analysis on Vibration of Building of New Research Institute
- Design of proper measures by comparing results of before and after design of measures against vibration of the test equipment to prepare for structural issues that may take place in the future through dynamic analysis of the initial structure
- Fig 1. Modeling (Rigid Supported system)
- Fig 2. Mode shape Result
- Fig 3. Before Measure
- Fig 4. After Measure
- Fig 5. Precise Vibration Measurement of MG-Set and Verification of Design of Vibration-proof Table
- Evaluation on Effects of Vibration of Foundation Structure of Semi-Conductor
- The strengthening of a structure is reflected on a design by predicting vibration issues that may occur in the future through dynamic design of the initial structure by performing the analysis on SPAN dynamic stiffness of a semi-conductor factory.
- Fig 1. Mode Shape 1st
- Fig 2. Mode Shape 2nd
- Fig 3. Mode Shape 3rd
- Fig 4. Structure Modeling
- Fig 5. Structure Analysis
- Fig 6. Analysis Result
Case for Technical Service (Vibration)
- Evaluation on Effects of Vibration of AHU Facilities of ○○ Hospital
- To minimize vibration that is transmitted to an operation room below through a simulation of a dynamic response of a structure according to a measure against vibration by reviewing the specification of the AHU equipment located on the 4th floor
- Fig 1. Layout of Equipment at AHU Room on 4th Floor
- Fig 2. Modeling and Applying Exciting Force of Equipment
- Fig 3. Measure against Vibration Applied Model
- Fig 4. Natural Frequency Analysis
- Fig 5. Natural Frequency Analysis
- Fig 6. Result of Analysis on Operation Room on 3rd Floor
Service for Structural Diagnosis on Centrifuge of ○○ Chemical
- Fig 1. Measuring Generated Vibration and Natural Frequency of Equipment
- Fig 2. Modal analysis after Measure(Analysis Verification)
Service for Structural Diagnosis on Pipes at ○○ Site
- Fig 1. The Whole View of Site
- Fig 2. Modal analysis
- Fig 3. Applied Product
Case for Technical Service (Vibration)
- TMD (Turned Mass Damper, Dynamic absorber)
- The TMD is used when resonance occurs in a structure due to operation of mechanical facilities, vibration by walking of people, and by wind etc. If resonance occurs, since vibration of a structure drastically increases, it causes problems in usability and durability of a structure and even destruction of a structure. In these cases, the vibration can be reduced from minimum 25% up to 75% if the TMD is used. Fig 1 shows installation of TMD in case that a floor is vibrated, and Fig 2 shows the volume of reduction of vibration before and after measure. Fig3~4 show the compared results of the period of reduction of vibration before and after measure and the time for reduction is shortened by more than about 50% or so.
- Fig 1. Installing TMD
- Fig 2. Effect of Reduction of Vibration of TMD
- Fig 3. heel drop Time History before Measure / Fig 4. heel drop Time History after Measure
