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1)  Torn selvedge
破边
2)  edge broken
边破
3)  edge damage
破边;边伤
4)  perimeter blasting
周边爆破
1.
Test and research on perimeter blasting result of frozen soil in mine freezing shaft;
立井冻土周边爆破效果的试验研究
5)  Periphery-hole blasting
边孔爆破
6)  damage boundary
破损边界
1.
Then,to evaluate its damage potential,a concept of damage boundary surface is proposed,incorporating the effect of not only dimensionless critical velocity and critical acceleration but also frequency ratio.
以正切包装系统为例,研究考虑易损件的非线性包装系统在半正弦脉冲激励下的冲击特性,提出考虑易损件的产品包装系统冲击破损边界曲面新概念,讨论了频率比、脉冲激励幅值和系统参数对易损件破损边界的影响规律。
2.
Now Five-Step method or Six-Step method was usually used package design,they all need to define the fragility and damage boundary.
现在设计产品的运输包装广泛采用五步法或六步法,这其中都要确定产品的脆值,都要用到破损边界理论。
3.
The shock spectra and the damage boundary curve of corrugated board under the action of half-sinusoid pulse are obtained using four steps of Runge-Kutta numeric method, and the influence of various factors on shock response is discussed.
应用四阶龙格-库塔数值法求解,从而得到瓦楞纸板包装系统的冲击谱和破损边界曲线,讨论了相关参数对它们的影响。
补充资料:传热周边
分子式:
CAS号:

性质:在解决传热问题时所用的当量直径与用于计算压降的形式上虽相同,Ds=4rh;rh=流通面积/润湿周边;但两者的润湿周边定义则有所不同。以套管换热器为例,计算环隙中流体压降时的rh时,润湿周边为πDl+πD2,D1为内管外径,D2为外管内径,而计算传热时,润湿周边则为πDl,并称之为传热周边。   

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