论文标题
由于不对称的喷射沉积和滑坡，质心迁移在受影响的颗粒斜率上迁移
Centroid migration on an impacted granular slope due to asymmetric ejecta deposition and landsliding
论文作者
论文摘要
为了对陆地倾斜表面上发生的地形松弛有基本的理解，我们分析了对倾斜颗粒（干形）层的影响产生的火山口形状。由于不对称的喷射沉积，随后是滑坡，因此可以放松受影响的倾斜表面的斜率。利用固体弹丸对倾斜干层的实验结果，我们测量了由不对称碎屑引起的质心迁移的距离。我们发现，将其归一化为火山口小轴直径$ x_ \ mathrm {mig} $的质心迁移距离$ d_ \ mathrm {cy} $可以表达为目标$ \tanθ$的初始倾向，这是有效的摩擦系数$ k $ $ k $ $ k $ $ k $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c $ c的效果： $ x_ \ mathrm {mig}/d_ \ mathrm {cy} = k \tanθ/（1-（\tanθ/μ）^2）+c $，其中$ k = 0.6 $，$μ= 0.8 $，$ c = -0.1 $至$ 0.3 $。该结果与先前考虑不对称喷射沉积作用的研究一致。获得的结果提供了基本信息，用于分析行星表面上倾斜的地形降解，例如由于微作用的积累而导致的火山口降解。
For a fundamental understanding of terrain relaxation occurring on sloped surfaces of terrestrial bodies, we analyze the crater shape produced by an impact on an inclined granular (dry-sand) layer. Owing to asymmetric ejecta deposition followed by landsliding, the slope of the impacted inclined surface can be relaxed. Using the experimental results of a solid projectile impact on an inclined dry-sand layer, we measure the distance of centroid migration induced by asymmetric cratering. We find that the centroid migration distance $x_\mathrm{mig}$ normalized to the crater minor-axis diameter $D_\mathrm{cy}$ can be expressed as a function of the initial inclination of the target $\tanθ$, the effective friction coefficient $μ$, and two parameters $K$ and $c$ that characterize the asymmetric ejecta deposition and oblique impact effect: $x_\mathrm{mig}/D_\mathrm{cy}=K \tanθ/(1-(\tanθ/μ)^2)+c$, where $K=0.6$, $μ=0.8$, and $c=-0.1$ to $0.3$. This result is consistent with a previous study that considered the effect of asymmetric ejecta deposition. The obtained results provide fundamental information for analyzing the degradation of sloped terrain on planetary surfaces, such as crater-shape degradation due to the accumulation of micro-impacts.
