應用電腦輔助工程技術於耳機夾持力之整合設計

Applying Computer-Aided Engineering Technology in the Design of Headset Clamping Force

曾耀輝(Yao-Hui Tseng)

指導教授 ： 陳維隆

朝陽科技大學/設計學院/工業設計系/碩士(2011年)

摘要

本文研究是從電腦輔助工程系統(CAD/CAE)思考的角度，整合技術應用於頭戴式耳機之夾持力設計，其目的為提升頭戴式耳機產品設計效率，在最短的時間內掌握關鍵物理特性與設計方向，降低失敗風險與減低實體原型成本，提供設計開發前後階段之修正夾持力設計條件。
本文研究共分三階段。第一階段驗證「對稱式」與「非對稱式」之量測方式和有限元素模擬分析之關係進行比對，觀察結果發現「對稱式」量測方式與有限元素模擬分析比對結果相對誤差值較小，且該量測方式與實際材料受力情況特性十分符合夾持力測試之設計需求。建議「對稱式」量測方式可做為此類型研究量測方法。第二階段透過市售頭戴式耳機產品個案的設計程序作為範疇與研究探討。針對耳機穿戴使用時影響其舒適性之夾持力進行敏感度較高的簡化特徵條件進行實物量測，再輔以三維模型電腦輔助軟體（Pro/ENGINEER）建構幾何模型再應用於有限元素法（Finite element analysis）進行模擬分析計算，快速取得模擬分析數值並與實際測量數值進行比對，修正模擬頭戴式耳機夾持力之各項外型設計參數與探討觀察材料幾何邊界條件並預測其材料與幾何變形之「線性」和「非線性」反應情況。
本文研究所完成電腦輔助工程分析步驟，希冀可提供作為往後類似新產品開發之建議，其目的提升設計效率並在設計初期可以快速取得量化數據。第三階段主要針對影響耳機夾持力敏感度高之關鍵簡化特徵頭鋼帶零件進行各項進行探討藉由有限元素模擬分析，快速調整彈性頭鋼帶材質與外型參數如截面積、幾何形狀等。此階段研究結果可提供工程師在設計過程中修改調整夾持力時判斷修改條件之依據。

關鍵字

電腦輔助工程設計 ； 有限元素分析 ； 耳機夾持力設計

並列摘要

For the improvement of headphone design process, the numerical analysis of headband clamping force is an efficient tool. In this research, an innovative design methodology is proposed to accelerate the design flow, predict the physical characteristics of headband and reduce the development cost.
There are three parts in this research. At first part, two kinds of measurement conditions are tested for comparing the accuracy of finite element (FEM) analysis. In symmetric condition, the clamping force is loaded at both sides and at one side for non-symmetric condition. From the results, symmetric measurement is more precise than non-symmetric one. The symmetric one is chosen for later study. Secondly, some headphone products on market are analyzed in order to find the key parameters of headband clamping force. The simulation model were created by CAD (Pro/ENGINEER) and analyzed by FEM analysis. In our study, the simplified characteristic model can be extracted to analyze the headphone clamping force which is related with wearing comfort, also to simulate the linear and non-linear deformation of material. From previous study, stainless band in the headphone is the key part to dominate the clamping force. By the use of simulation methodology developed from this research, engineers can tune the clamping force from cross section, shape, material of stainless band in efficiency.
In conclusion, the design methodology and FEM simulation flow proposed in this research is helpful for engineer to adjust the clamping force efficiently and precisely.

並列關鍵字

Computer-aided engineering design ； Finite element (FEM) analysis ； Design of the headset clamping force

參考文獻

(3) 黃宗正，2000，”防音防護具舒適性能評估研究”，元智大學機械工程研究所碩士論文。

(4) 陳偉仁，2006)，”耳掛式耳機之人因分析研究”，大同大學工業設計研究所碩士論文。

(10) 行政院勞工委員會勞工安全衛生研究所，1995，《勞工頭型模式之研究》，行政院勞工委員會勞工安全衛生研究所。

(11) Liu, B. S., 2008,”Incorporating anthropometry into design of ear-related products”. Applied Ergonomics, pp.115-121.

(12) Foreshaw, S. E., 1966,”The significance of variances in the real-ear sensitivity of a circum-aural earphone”.Sound Vibration, pp.45-50.