液晶顯示器壁掛架之振動特性分析

傳統上的液晶顯示器置放方式以安裝腳架放在平台為主，現今以壁掛方式置放已隨處可見，而掛於牆上的液晶顯示器具有一定重量，若沒有充分考慮對人們可能產生的風險則可能會產生意料之外的傷害，比如掉落造成人員受傷或財產損失，因此其結構性有探討的必要。本文首先使用有限元素分析軟體ANSYS 對壁掛架進行模態與靜力分析，以及壁掛架與液晶顯示器組合的模態分析。結果顯示壁掛架受力最大的位置在壁掛架組合處，並以模態試驗實證有限元素模擬的可行性，最後對結構參數實行最佳化規劃以降低壁掛架與液晶顯示器組合因振動而跳脫掉落的可能性。

關鍵字

有限元素；振動模態；應力應變；田口法

並列摘要

In the early years, LCD monitor was usually assembled with neck on the table. In order to obtain useful space, people took LCD monitor on the wall with the wall mount bracket. Because of the heavy weight, it is necessary to discuss the structure about the wall mount bracket and the LCD monitor on the wall. We used the finite element method software ANSYS to find the vibrations characteristics of the wall mount bracket and the LCD monitor. We analyzed the wall mount bracket about static analysis, modal analysis, and modal analysis about the assembly of the wall mount bracket and the LCD monitor, and discussed the optimization about that. We found the maximum stress was appeared at the interface of the wall mount bracket assembly, and used the Taguchi method to improve the safety of LCD Wall Mount Bracket.