薄壁金屬管在中高速?zèng)_擊下的緩沖特性研究
發(fā)布時(shí)間：2018-07-14 14:09
【摘要】：薄壁金屬管塑性變形緩沖器通過塑性變形吸收能量,是沖擊動(dòng)力學(xué)領(lǐng)域所用緩沖器之一。通過試驗(yàn)和數(shù)值模擬研究了薄壁金屬管塑性變形緩沖器在中高速?zèng)_擊下的緩沖特性。通過空氣炮試驗(yàn),得到了薄壁金屬管在中速?zèng)_擊下的變形特點(diǎn)及緩沖力,分析了薄壁金屬管在中高速?zèng)_擊下的變形機(jī)理。研究了薄壁金屬管半錐角、沖擊速度、沖擊質(zhì)量對薄壁金屬管緩沖性能的影響。結(jié)果表明:隨著沖擊速度的提高(30m/s~500m/s),緩沖力穩(wěn)定性降低,緩沖力波動(dòng)范圍從8.2k N提高到19.9k N,最大緩沖力從19.9k N提高到34k N;半錐角不同會(huì)影響薄壁金屬管的最大緩沖力;當(dāng)沖擊速度大于100m/s時(shí),薄壁金屬管緩沖力穩(wěn)定性不受沖擊質(zhì)量影響。
[Abstract]:Thin-walled metal tube plastic deformation buffer absorbs energy through plastic deformation and is one of the buffers in the field of impact dynamics. The buffering characteristics of thin wall metal tube plastic deformation buffers under moderate and high speed impact were studied by experiment and numerical simulation. The deformation characteristics and cushioning force of thin-walled metal pipe under medium speed impact were obtained by air gun test. The deformation mechanism of thin-walled metal pipe under medium and high speed impact was analyzed. The effects of semi-cone angle, impact velocity and impact mass on the buffer performance of thin-walled metal tubes were studied. The results show that with the increase of impact velocity (30m/s~500m/s), the stability of buffer force decreases, the fluctuation range of buffer force increases from 8.2 KN to 19.9kN, the maximum buffer force increases from 19.9kN to 34kN, and the maximum buffer force of thin-walled metal pipes is affected by different semi-cone angles. When the impact velocity is greater than 100m/s, the buffer force stability of thin wall metal tube is not affected by impact mass.
【作者單位】： 中北大學(xué)機(jī)電工程學(xué)院;中北大學(xué)地下目標(biāo)毀傷技術(shù)國防重點(diǎn)學(xué)科實(shí)驗(yàn)室;
【基金】：兵器裝備預(yù)先研究項(xiàng)目(63206050401) 山西省留學(xué)人員科技活動(dòng)擇優(yōu)資助項(xiàng)目(5386046750)
【分類號】：O347
本文編號：2121893
[Abstract]:Thin-walled metal tube plastic deformation buffer absorbs energy through plastic deformation and is one of the buffers in the field of impact dynamics. The buffering characteristics of thin wall metal tube plastic deformation buffers under moderate and high speed impact were studied by experiment and numerical simulation. The deformation characteristics and cushioning force of thin-walled metal pipe under medium speed impact were obtained by air gun test. The deformation mechanism of thin-walled metal pipe under medium and high speed impact was analyzed. The effects of semi-cone angle, impact velocity and impact mass on the buffer performance of thin-walled metal tubes were studied. The results show that with the increase of impact velocity (30m/s~500m/s), the stability of buffer force decreases, the fluctuation range of buffer force increases from 8.2 KN to 19.9kN, the maximum buffer force increases from 19.9kN to 34kN, and the maximum buffer force of thin-walled metal pipes is affected by different semi-cone angles. When the impact velocity is greater than 100m/s, the buffer force stability of thin wall metal tube is not affected by impact mass.
【作者單位】： 中北大學(xué)機(jī)電工程學(xué)院;中北大學(xué)地下目標(biāo)毀傷技術(shù)國防重點(diǎn)學(xué)科實(shí)驗(yàn)室;
【基金】：兵器裝備預(yù)先研究項(xiàng)目(63206050401) 山西省留學(xué)人員科技活動(dòng)擇優(yōu)資助項(xiàng)目(5386046750)
【分類號】：O347
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