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冲击载荷下磁流变变刚度变阻尼缓冲系统减振控制(Absorbing Control of Magneto-rheological Variable Stiffness and Damping System under Impact Load)
磁流变液 半主动控制 变刚度 冲击载荷
2010/4/1
针对传统缓冲着陆装置阻尼刚度不可调节的局限性,提出采用基于磁流变技术的自适应变阻尼变刚度缓冲装置。首先从理论上研究了采用磁流变阻尼器实现刚度阻尼等效控制的原理,分析了刚度阻尼调节范围;进而设计了基于能量守恒原理和天棚阻尼控制技术的飞行器缓冲着陆的自适应控制器,最后通过数值分析考察缓冲器和控制策略的有效性。分析结果表明,与被动缓冲装置相比,基于磁流变技术的缓冲装置不仅能降低着陆冲击过程的峰值载荷,而...
Dynamic stress intensity factors around two cylindrical cracks in an infinite elastic medium subject to impact load
Stress intensity factor Two cylindrical cracks Transient stresses
2010/9/27
Dynamic stresses are solved for two cylindrical cracks in an infinite elastic medium. Incident shock stress waves pass through the elastic medium normal to the cracks’ axis. In the Laplace transform d...