에어컨 실내기 사출 조립품의 열 변형 3D측정과 유한요소해석

다국어 초록 (Multilingual Abstract)

Thermal deformation, such as bending and twisting, occurs among the polymer parts of air-conditioner indoor units because of repetitive temperature change during heating operation. In this study, a numerical method employing finite-element analysis to efficiently simulate the thermal deformation of an assembly is proposed. Firstly, the displacement of an actual assembly produced by thermal deformation was measured using a 3D optical measurement system. The measurement results indicated a general downward sag of the assembly, and the maximum displacement value was approximately 1 mm. The temperature distribution was measured using a thermographic camera, and the results were used as initial-temperature boundary conditions to perform temperature-displacement analysis. The simulation results agreed well with the measured data. To reduce the thermal deformation, the stiffness increased 100%. As the results, the maximum displacement decreased by approximately 5.4% and the twisting deformation of the holder improved significantly.

참고문헌 (Reference)

1 이동규, "캐비닛 구조물의 내부 마찰소음 발생 메커니즘에 관한 실험적 연구" 대한기계학회 37 (37): 249-255, 2013

2 팽진기, "일체형 세라믹 열교환기의 전산 열응력 해석에 관한 연구" 대한설비공학회 21 (21): 613-620, 2009

3 Lim, S., "Thermal Fluid Flow Structural Coupled Analysis of Solid Motor Nozzle for Safety Estimation" 99-102, 2011

4 Bouissou, S., "Stress Drop and Contact Stiffness Measured form Stick-slip Experiments on PMMA-PMMA Friction" 7 : 61-65, 1999

5 GOM PONTOS, "PONTOS User’s Manual" GOM mbH 2011

6 Incropera, F. P., "Introduction to Heat Transfer" John Wiley and Sons(ASIA) Pte. Ltd. 2007

7 An, C. S., "Flow and Heat Transfer Analysis for the Performance Improvement of Cross-flow Fin-tube Heat Exchangers" 183-189, 2004

8 Choi, B., "CFD and FEM Analysis of Automotive Disc Brake" 820-825, 2001

9 ABAQUS 6. 10, "ABAQUS User’s Manual" Dassault Systemes Simulia Corp. 2011

10 Jung, J. H., "A Study on the Thermo-flow Analysis of Air Conditioning Compressor Motor System for Green Car" 630-635, 2011

11 Park, J. W., "A Study on Heat Transfer and Thermal Stress Analysis Method Utilizing FSI Technique" 595-596, 2008