中量級(jí)強(qiáng)沖擊試驗(yàn)機(jī)擺錘結(jié)構(gòu)優(yōu)化設(shè)計(jì)與沖擊數(shù)值仿真
本文選題:沖擊動(dòng)力學(xué) + 水下爆炸 ; 參考:《華中科技大學(xué)》2014年碩士論文
【摘要】:現(xiàn)代艦船對(duì)各類機(jī)電設(shè)備、精密儀器的依賴程度越來越高,而另一方面各類設(shè)備容易受沖擊影響,尤其是受作戰(zhàn)環(huán)境下的強(qiáng)沖擊作用影響而失效,使艦船喪失作戰(zhàn)能力。因此關(guān)注艦船設(shè)備的抗沖擊能力以及在設(shè)備列裝之前對(duì)其進(jìn)行沖擊試驗(yàn)是十分重要的工作。對(duì)設(shè)備進(jìn)行抗沖擊試驗(yàn)主要有三類方法:實(shí)船爆炸試驗(yàn),虛擬沖擊試驗(yàn)以及沖擊試驗(yàn)機(jī)試驗(yàn)。鑒于各類方法的利弊與經(jīng)濟(jì)成本,目前較為流行的方法是對(duì)艦船設(shè)備進(jìn)行沖擊試驗(yàn)機(jī)試驗(yàn)。本文主要內(nèi)容如下: 首先簡單介紹了課題的背景與意義,介紹了對(duì)艦船設(shè)備進(jìn)行沖擊試驗(yàn)的各類方法與發(fā)展趨勢,對(duì)國內(nèi)外沖擊規(guī)范以及沖擊試驗(yàn)設(shè)備的現(xiàn)狀做了簡單介紹。 簡要概述了沖擊動(dòng)力學(xué)基本理論以及水下爆炸的載荷特征。建立了沖擊試驗(yàn)機(jī)的三維實(shí)體模型,基于剛體動(dòng)力學(xué)模型與優(yōu)化設(shè)計(jì)原理,建立了沖擊試驗(yàn)機(jī)擺錘系統(tǒng)的優(yōu)化設(shè)計(jì)模型,,求得了擺錘系統(tǒng)的最優(yōu)尺寸。優(yōu)化后的擺錘系統(tǒng)可提高試驗(yàn)機(jī)的性能,同時(shí)可有效降低沖擊試驗(yàn)對(duì)擺錘轉(zhuǎn)軸的損傷。 利用ANSYS/LS-DYNA軟件對(duì)沖擊試驗(yàn)過程進(jìn)行了數(shù)值仿真計(jì)算,得到了沖擊接觸面的作用力結(jié)果。此外,在不同的沖擊速度及不同的波形器材質(zhì)條件下對(duì)沖擊試驗(yàn)進(jìn)行仿真計(jì)算,對(duì)仿真結(jié)果進(jìn)行了分析,得出了沖擊速度以及波形發(fā)生器材料特性對(duì)沖擊力波形的影響規(guī)律,對(duì)設(shè)計(jì)不同的沖擊波形有一定的指導(dǎo)意義。 文章最后對(duì)所做工作做了總結(jié),并對(duì)后繼工作做了簡要展望。
[Abstract]:Modern warships rely more and more on various kinds of mechanical and electrical equipment and precision instruments. On the other hand, all kinds of equipments are vulnerable to impact, especially because of the strong impact in combat environment, which makes the warship lose its combat capability. Therefore, it is very important to pay attention to the shock resistance of ship equipment and to test the equipment before it is installed. There are three kinds of methods to test the equipment: explosion test, virtual impact test and impact test. In view of the advantages and disadvantages of various methods and economic costs, the more popular method is to test the ship equipment impact testing machine. The main contents of this paper are as follows: firstly, the background and significance of the subject are briefly introduced, and various methods and development trends of impact test for ship equipment are introduced. The impact code and the current situation of impact test equipment at home and abroad are briefly introduced. The basic theory of impact dynamics and the load characteristics of underwater explosion are briefly summarized. The three-dimensional solid model of impact testing machine is established. Based on the rigid body dynamics model and optimization design principle, the optimal design model of impact testing machine pendulum system is established, and the optimal size of pendulum system is obtained. The optimized pendulum system can improve the performance of the test machine and reduce the damage caused by impact test to the rotary shaft of the pendulum. The impact test process was simulated by ANSYS- LS-DYNA software, and the results of the impact contact force were obtained. In addition, the impact test is simulated and calculated under different impact speed and different waveform materials. The simulation results are analyzed, and the influence law of impact velocity and material characteristics of waveform generator on the impact wave is obtained. It has certain guiding significance for designing different shock wave shapes. Finally, the paper summarizes the work done, and makes a brief outlook for the follow-up work.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:U674.703
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