【摘要】：近年來,基于物理模型的可視化仿真技術不斷進步,如帽子自由落體與桌面碰撞變形、旗幟在風中飄揚、粘彈性物體之間的互相撞擊等,具有高度真實感的仿真技術已經成為未來幾年里各計算機應用領域中最為熱門的發(fā)展方向。本文基于對金屬材料特性的分析,通過對金屬薄片彎折變形、沖壓成型等物理過程進行模擬,在相關研究工作的基礎上,對變形過程進行優(yōu)化,給出了一個快速有效的金屬薄片自適應變形仿真的框架,并給出多種金屬材料的變形實驗對比,以驗證其有效性和先進性。本文的主要工作內容和創(chuàng)新點如下:1.提出了新的、針對金屬材料薄片變形的虛擬仿真框架,研究分析、并驗證了金屬薄片材料各種物理特性,如彈性模量,彎曲剛度,拉伸剛度等;2.在金屬薄片網格中嵌入加勁肋,針對不同的金屬材料,通過調整相關參數,針對不同的彎曲剛度、實現了不同程度的加勁肋,提高了金屬薄片變形仿真的真實感效果;3.在自適應重新網格化的過程中,考慮金屬獨特的拉伸性能,對現有工作中的網格最佳尺寸優(yōu)化條件做了增刪,相關實現結果及分析表明,改進后的自適應重新網格化算法具有更為真實的變形模擬效果;
[Abstract]:In recent years, visual simulation technology based on physical model has made continuous progress, such as hat free fall and desktop collision deformation, flag fluttering in the wind, interaction between Viscoelastic objects and so on. The highly realistic simulation technology has become the most popular development direction in the field of computer applications in the next few years. In this paper, based on the analysis of the characteristics of metal materials, the physical processes such as bending deformation and stamping forming of metal sheets are simulated. On the basis of the related research work, the deformation process is optimized, a fast and effective framework for adaptive deformation simulation of metal sheets is given, and the deformation experiments of various metal materials are given to verify its effectiveness and advanced nature. The main contents and innovations of this paper are as follows: 1. A new virtual simulation framework for sheet deformation of metal materials is proposed, and various physical properties of metal sheet materials, such as elastic modulus, bending stiffness, tensile stiffness and so on, are verified. The stiffener is embedded in the metal sheet grid, and according to different metal materials, by adjusting the relevant parameters and different bending stiffness, the stiffener is realized in different degrees, and the realistic effect of metal sheet deformation simulation is improved. 3. In the process of adaptive regridding, considering the unique tensile properties of metals, the optimal grid size optimization conditions in the existing work are added and deleted. The related implementation results and analysis show that the improved adaptive regridding algorithm has a more real deformation simulation effect.
【學位授予單位】：遼寧師范大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TG115.5

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