Impact behavior is a ubiquitous phenomenon in multibody systems. The contact force model
is a pivotal tool to predict the contact characteristics of multibody systems. At present, there …

In this work, we introduce, justify and demonstrate the Corrective Source Term Approach
(CoSTA)—a novel approach to Hybrid Analysis and Modeling (HAM). The objective of HAM …

Vibro-impact drilling has shown huge potential of delivering better rate of penetration,
improved tools lifespan and better borehole stability. However, being resonantly instigated …

As a rotary-percussion system, the vibro-impact drilling (VID) system utilises resonantly
induced high frequency periodic impacts alongside existing drill-string rotation to cut through …

接触碰撞行为作为大自然与多体系统中的常见现象, 其接触力模型对于多体系统的碰撞行为机理
研究与性能预测至关重要. 静态弹塑性接触模型与考虑能量耗散的连续接触力模型是研究接触 …

The lining of the small intestine consists of a series of circular folds, which is the main source
of intestinal resistance for capsule endoscopy. This paper presents an in-depth bifurcation …

Drilling high-temperature geothermal wells presents technical and economic challenges.
Real-time and precise estimation of bottom-hole circulating temperature (BHCT) during …

The GRACE satellite provides tools for accurately characterizing the spatiotemporal
variations of regional groundwater storage anomalies (GWSA) under the background of …

This paper aims to study the near-grazing bifurcations in a single-degree-of-freedom impact
oscillator with two-side elastic constraints, and further stabilize the near-grazing dynamics …

Dynamics of the bit-rock interaction under percussive drilling often encounter multistability
that produces coexisting impact motions for a wide range of drilling conditions. Some of …