【摘要】：近年來(lái),基于物理模型的可視化仿真技術(shù)不斷進(jìn)步,如帽子自由落體與桌面碰撞變形、旗幟在風(fēng)中飄揚(yáng)、粘彈性物體之間的互相撞擊等,具有高度真實(shí)感的仿真技術(shù)已經(jīng)成為未來(lái)幾年里各計(jì)算機(jī)應(yīng)用領(lǐng)域中最為熱門(mén)的發(fā)展方向。本文基于對(duì)金屬材料特性的分析,通過(guò)對(duì)金屬薄片彎折變形、沖壓成型等物理過(guò)程進(jìn)行模擬,在相關(guān)研究工作的基礎(chǔ)上,對(duì)變形過(guò)程進(jìn)行優(yōu)化,給出了一個(gè)快速有效的金屬薄片自適應(yīng)變形仿真的框架,并給出多種金屬材料的變形實(shí)驗(yàn)對(duì)比,以驗(yàn)證其有效性和先進(jìn)性。本文的主要工作內(nèi)容和創(chuàng)新點(diǎn)如下:1.提出了新的、針對(duì)金屬材料薄片變形的虛擬仿真框架,研究分析、并驗(yàn)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(wǎng)格中嵌入加勁肋,針對(duì)不同的金屬材料,通過(guò)調(diào)整相關(guān)參數(shù),針對(duì)不同的彎曲剛度、實(shí)現(xiàn)了不同程度的加勁肋,提高了金屬薄片變形仿真的真實(shí)感效果;3.在自適應(yīng)重新網(wǎng)格化的過(guò)程中,考慮金屬獨(dú)特的拉伸性能,對(duì)現(xiàn)有工作中的網(wǎng)格最佳尺寸優(yōu)化條件做了增刪,相關(guān)實(shí)現(xiàn)結(jié)果及分析表明,改進(jìn)后的自適應(yīng)重新網(wǎng)格化算法具有更為真實(shí)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(xué)位授予單位】：遼寧師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TG115.5

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