CAJ | 학술논문

长期以来,一直认为对于持续时间很短的(毫秒范围内)的冲击,阻尼对最大的结构响应没有显著的影响,因此隔冲系统通常都只是从刚度上进行设计.随着磁流变/电流变阻尼器等的出现,在冲击隔离中使用阻尼或半主动阻尼逐渐成为研究的热点.但主要集中在地震防护等冲击持续时间较长或只关心相对位移幅值的应用中.而对于舰船设备这类,遭受持续时间很短(十毫秒量级)的冲击,但又对冲击隔离效率和相对位移幅值都有严格要求的冲击隔离问题,这方面的研究很少,通过对粘性阻尼在软特性刚度隔冲系统中的作用的研究,表明阻尼可以改善软特性刚度隔冲系统的隔冲性能,但是,随着刚度的软特性的增强,阻尼对隔冲性能的提升作用随之下降.
장기이래,일직인위대우지속시간흔단적(호초범위내)적충격,조니대최대적결구향응몰유현저적영향,인차격충계통통상도지시종강도상진행설계.수착자류변/전류변조니기등적출현,재충격격리중사용조니혹반주동조니축점성위연구적열점.단주요집중재지진방호등충격지속시간교장혹지관심상대위이폭치적응용중.이대우함선설비저류,조수지속시간흔단(십호초량급)적충격,단우대충격격리효솔화상대위이폭치도유엄격요구적충격격리문제,저방면적연구흔소,통과대점성조니재연특성강도격충계통중적작용적연구,표명조니가이개선연특성강도격충계통적격충성능,단시,수착강도적연특성적증강,조니대격충성능적제승작용수지하강.
It is considered for a long time that damping hasn't obvious effect on structure's maximum response when the structure is suffered with a short time shock. So a shock isolation system is often designed only considering its stiffness. Using damping or semi-active damping in a shock isolation system is becoming a study hotspot after appearance of MR/ER dampers. But, studies mainly are concentrated into applications with a long time shock or cases in which only the maximum relative displacements are cared under earthquake. But, there are few studies on cases with a short time shock or with strict demands on both shock isolation efficiency and relative displacement amplitude in equipments of war-ship. The effect of viscous damping in a soft stiffness shock isolation system was studied here. It was indicated that using damping can improve the shock isolation performance, but with enhancing the soft characteristic of the stiffness, the im-proved effect of damping on shock isolation performance drops.