| 摘要 |
PROBLEM TO BE SOLVED: To obtain a maximum effect by clarifying an application position of weldbond for achieving the improvement of rigidity of a vehicle body, the reduction of a transmitted sound or the like and suppressing influence on capital investment and productivity and increase in costs. SOLUTION: A finite element model for an analytical target such as a vehicle body is formed and all joint portions are approximately processed by spring joints. Real eigenvalue analysis in modal analysis for three modes, i.e. a one-joint twist mode, a two-joint bending mode and a horizontal bending mode of the vehicle body, is executed and the distortion states of the portions approximated by the spring joints are obtained. Then a portion with large distortion is determined as a portion to which the weldbond is to be applied by rigidity analysis. Then the area (the area of a weldbond unnecessary portion) of a gap allowed to achieve target insulation ability for a random sound from the lower part of a vehicle floor panel is calculated by executing the analysis of transmitted sound. While considering an application position based on rigidity analysis, the application position of the weldbond corresponding to the area of the weldbond unnecessary portion is determined. COPYRIGHT: (C)2008,JPO&INPIT
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