承受軸向壓縮負載薄壁管之模擬分析

Analysis of the Thin-walled Tubes under Axial Compressive Loading

姜文忠(Wen-Zhong Jiang)

指導教授 ： 陳政順

國立臺北科技大學/機電學院/製造科技研究所/碩士(2013年)

https://doi.org/10.6841/NTUT.2013.00739

摘要

本研究乃採用五種不同斷面形狀薄壁管進行有限元素數值模擬技術分析，利用有限元素分析軟體分別對圓形、十邊形、十二邊形、十四邊形、十六邊形的五種不同斷面形狀在受到軸向壓縮之後的能量吸收性。初步結果顯示十邊形有最好的平均壓垮負載及能量的吸收，且結構有效性和管件的吸能成正比。
利用田口實驗法中的 直交表，主要的控制因子有管件厚度、長度、材料和形狀等四個因子，並以田口實驗之望大特性品質分析法以管件最大結構有效性為其實驗目標，經由S/N比反應表與反應圖結果顯示，影響結構有效性的最大因子為管件厚度(79.59%)，其次為管件斷面形狀(13.13%)，根據這些分析結果，可以作為往後薄壁管結構有效性之設計參考。

關鍵字

有限元素分析 ； 薄壁管 ； 能量吸收

並列摘要

In this study, the finite element technique is used to study the behavior of thin-walled tubes under axial compressive loading. The commercial software was used to simulate the deformation and stress distribution of tubes with different cross-sectional shapes. The shapes selected were round circle, 10-sided, 12-sided, 14-sided, 16-sided convex polygon. The energy absorption of different types of tube under axial loading also was calculated. Preliminary results showed that the 10-sided convex polygon has the best average crush load and energy absorption, and the
structure effectiveness is proportional to the energy absorption of tubes.
In addition, the structural effectiveness is investigated based on the orthogonal array from Taguchi method. The 4 main control factors selected were the thickness, length, material and shape of the tube. The quality objective was the structural effectiveness and characterized as the Larger-is–better. In this case study, the result from the calculate S/N ratios, linear graphs and response graphs of control factors showed that the biggest factor affecting the effectiveness of structural tube is
thickness, followed by cross-sectional shape of the tube.

並列關鍵字

Finite Element Method ； Thin-walled tubes ； Energy absorption

參考文獻

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