筆記型電腦之觸控板長條狀按鍵之施力面多節點應力分析與最佳化形狀設計

Multiple-Node Stress Analysis on an Acted-Force Surface and Optimization Shape Design for a Touchpad’s Rectangular Button on the Notebook

林皇佑(Huang-Yo Lin)

指導教授 ： 林震

國立臺北科技大學/機電學院/機電整合研究所/碩士(2012年)

摘要

本文使用電腦輔助工程軟體Pro/Mechanica以及電腦輔助設計軟體Pro/ENGINEER對筆記型電腦之觸控板長條狀按鍵之施力面作多節點應力分析，並以循序二次規劃法進行最佳化形狀設計。經由這些軟體的使用，本文建立多節點施力中心，當不同施力節點作用時，以監控筆記型電腦之觸控板長條狀按鍵之目標測量節點之變化量。這些變化量包含節點的位移量與節點的Max Von Mises應力，以驗證使用三角形外心法能夠適當的決定應力分析的施力區中心點。而應力分析能夠使用於評估長條型按鍵模型的尺寸靈敏度與形狀最佳化的可行性。模擬分析結果顯示，最佳化模型比原始模型有較佳的改善性能，就按鍵之不同施力區的手感度、最大位移量與Max Von Mises應力而言。本研究證實筆記型電腦之觸控板按鍵的最佳化模型設計，能有效的改善其按鍵設計時的各項設計流程，提升設計的效率。

關鍵字

電腦輔助工程軟體 ； CAE ； CAD ； 最佳化 ； 觸控板長條狀按鍵

並列摘要

This paper used a computer added engineering (CAE) software, Pro/Mechanica, as well as a computer added design (CAD) software, Pro/ENGINEER, to analyze the stress of the multiple-node on an acted-force surface for a touchpad’s rectangular button (TRB) on the notebook. Then, this study made an optimization shape design for the TRB using a sequential quardratic programming method. Through the use of the aforementioned softwares, this study established an acted center of the multiple-node to monitor the variable values of the objective measure nodes of the TRB on the notebook, when this study applied different acted-force nodes. This study applied the circumcenter of a triangle to determine an appropriate center of the acted-force node of the stress. This determined center was demonstrated by these variables values which include the displacements and the Max Von Mises stresses of the nodes. This study used the stress analysis to evaluate the size sensitivity and the shape optimization of the TRB. Simulation results showed that the optimization model of the TRB achieved better the improvement of the performance than the original model of the TRB, in terms of the feel on different acted-force surface, maximum displacement, and Max Von Mises stress for the TRB on the notebook. This study also indicated that the optimization shape design of the TRB on the notebook effectively improved the design procedure of the TRB, thereby increasing the design efficiency for the TRB.

並列關鍵字

Computer aided engineering (CAE) ； computer aided design (CAD) ； optimization ； touchpad’s rectangular button (TRB)

參考文獻

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