モード解析を使ったモバイル機器の落下衝撃応答簡易解析法の開発(<特集>D&D 2008)

概要

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This paper presents a method for quickly analyzing drop impact on mobile devices at an early design stage. Drop impact response analysis is one of the most important analyses for producing reliable products. Many parts depending on the know-how of experts now take lot of time and money to analyze. To reduce the development lead time and cost, an efficient analysis method is proposed. First, after drop transformation shapes were carefully observed, a drop impact response analysis using modal analysis was derived. Second, the natural frequencies and mode shapes of the mobile device were measured for the proposed analysis method. The modal parameters of the mobile device were acquired precisely for a broadband frequency with a scanning laser doppler vibrometer. A simple plate model can be used for this analysis model instead of a complicated model converted from a computer aided design. The accuracy of the proposed method is almost the same as that of finite element analysis by an explicit method using a complicated model.
一般社団法人日本機械学会の論文
2009-05-25