Application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis

碩士 === 國立雲林科技大學 === 機械工程系 === 103 === Economic development often results in the escalation of greenhouse gas emissions. In Taiwan, as the economy shifted from labor intensive industries to high-tech manufacturing, carbon dioxide emissions in this country has continued to rise. The major emitters in...

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Main Authors: Hao-Sian Lu, 盧浩賢
Other Authors: Shi-Chang Tseng
Format: Others
Language:zh-TW
Published: 2015
Online Access:http://ndltd.ncl.edu.tw/handle/2hmw57
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spelling ndltd-TW-103YUNT04890082019-05-15T21:51:47Z http://ndltd.ncl.edu.tw/handle/2hmw57 Application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis 有限元素應用於工具機熱傳分析及電動機車車架應力分析 Hao-Sian Lu 盧浩賢 碩士 國立雲林科技大學 機械工程系 103 Economic development often results in the escalation of greenhouse gas emissions. In Taiwan, as the economy shifted from labor intensive industries to high-tech manufacturing, carbon dioxide emissions in this country has continued to rise. The major emitters in Taiwan are the manufacturing industries, power plants, cars, and motorcycles. While cutting down industrial emissions remains a global challenge, the curbing of vehicle emissions has shown plenty of promise and the number of electric motorcycles on the roads has continued to grow around the world. The main components of an electric motorcycle include the frame, a motor and batteries. In particular, the rigidity of the frame plays a key role in the vehicle safety. The key factors to consider when designing the frame of an electric motorcycle are the strains caused by vehicle loading, the residual stress caused by machining, and the vibration frequency of the motor. In addition, during the machining process, heat transfer can play a major factor in affecting precision and accuracy. The heat on a machine tool can be generated by the surrounding environment as well as the machine tool itself through vibration, movement and friction. The present study involved two investigations. The first was the analysis of heat transfer of a machine tool. Thermal couples were used to measure the temperatures at specific locations of the machine tool. ANSYS-transient heat transfer module was then used to simulate and analyze the effects of the moving speeds, movement durations, and activation times on the thermal field of the machine tool. It was found that the primary factor influencing temperature variation on the machine tools was heat loss of the electrical motor. The secondary factor was the frictional heat generated by the bearings. The second investigation was a stress-strain analysis of an electric driven motorcycle frame. A strain gauge was used to measure the strain on the frame. Simulation and analysis were carried out in ANSYS-static structure module. It was found that the inclination between the rear suspension and the ground influenced the locations of stress concentrations. Moreover, it was found that positive inclinations were better for lowering stress concentration, which in turn avoided excessive loading at any one point on the frame. Furthermore, it was found that stress concentration was lowered by placing the battery rack underneath the pedal frame. Shi-Chang Tseng 曾世昌 2015 學位論文 ; thesis 145 zh-TW
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description 碩士 === 國立雲林科技大學 === 機械工程系 === 103 === Economic development often results in the escalation of greenhouse gas emissions. In Taiwan, as the economy shifted from labor intensive industries to high-tech manufacturing, carbon dioxide emissions in this country has continued to rise. The major emitters in Taiwan are the manufacturing industries, power plants, cars, and motorcycles. While cutting down industrial emissions remains a global challenge, the curbing of vehicle emissions has shown plenty of promise and the number of electric motorcycles on the roads has continued to grow around the world. The main components of an electric motorcycle include the frame, a motor and batteries. In particular, the rigidity of the frame plays a key role in the vehicle safety. The key factors to consider when designing the frame of an electric motorcycle are the strains caused by vehicle loading, the residual stress caused by machining, and the vibration frequency of the motor. In addition, during the machining process, heat transfer can play a major factor in affecting precision and accuracy. The heat on a machine tool can be generated by the surrounding environment as well as the machine tool itself through vibration, movement and friction. The present study involved two investigations. The first was the analysis of heat transfer of a machine tool. Thermal couples were used to measure the temperatures at specific locations of the machine tool. ANSYS-transient heat transfer module was then used to simulate and analyze the effects of the moving speeds, movement durations, and activation times on the thermal field of the machine tool. It was found that the primary factor influencing temperature variation on the machine tools was heat loss of the electrical motor. The secondary factor was the frictional heat generated by the bearings. The second investigation was a stress-strain analysis of an electric driven motorcycle frame. A strain gauge was used to measure the strain on the frame. Simulation and analysis were carried out in ANSYS-static structure module. It was found that the inclination between the rear suspension and the ground influenced the locations of stress concentrations. Moreover, it was found that positive inclinations were better for lowering stress concentration, which in turn avoided excessive loading at any one point on the frame. Furthermore, it was found that stress concentration was lowered by placing the battery rack underneath the pedal frame.
author2 Shi-Chang Tseng
author_facet Shi-Chang Tseng
Hao-Sian Lu
盧浩賢
author Hao-Sian Lu
盧浩賢
spellingShingle Hao-Sian Lu
盧浩賢
Application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis
author_sort Hao-Sian Lu
title Application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis
title_short Application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis
title_full Application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis
title_fullStr Application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis
title_full_unstemmed Application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis
title_sort application of finite element to the thermal transfer analysis of machine tools and the motor frame stress analysis
publishDate 2015
url http://ndltd.ncl.edu.tw/handle/2hmw57
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