研究多体系统与可变形结构碰撞,提出改进接触建模方法。
Impacts between multibody systems and deformable structures
- 用非对称弹簧模型刻画多体间单向接触
- 仿真验证了弹性元件对碰撞响应的影响
- 适合做动态系统碰撞仿真的研究人员参考
碰撞与冲击是导致瞬时运动的主要原因,常见于动态系统响应中。由于缺乏精确且普遍接受的本构关系来描述其力学行为,精确建模冲击仍具挑战性。本文讨论刚体方法与软接触方法,并通过数值算例进行验证。重点研究包含多个单向接触的系统中的碰撞问题,以及与弹性元件的碰撞行为。分析了连接用单向弹簧的参数影响。
原文摘要 · Abstract (English)
Collisions and impacts are the principal reasons for impulsive motions, which we frequently see in dynamic responses of systems. Precise modelling of impacts is a challenging problem due to the lack of the accurate and commonly accepted constitutive law that governs their mechanics. Rigid-body approach and soft contact methods are discussed in this paper and examined in the presented numerical examples. The main focus is set to impacts in systems with multiple unilateral contacts and collisions with elastic elements of the reference. Parameters of interconnecting unilateral springs are under discussion.
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