摘要
针对常见的发动机等机械的隔振问题,建立了多复合激励下柔性板基础上斜置被动隔振系统的动力学模型。在分析各子系统导纳或阻抗矩阵的基础上,运用子结构导纳综合法以及传递矩阵技术,对系统进行了综合并推导了整体系统的传递功率流。通过数值仿真研究了斜置被动隔振系统的功率流传递特性,探讨了隔振器倾斜角变化对系统隔振效果的影响,表明斜置隔振器能够提高复合激励下系统的隔振效果并会使系统的刚性模态发生偏移。
Aiming at efficient vibration isolation of vibrating machines in practical engineering,a dynamic model of flexible systems,which are subjected to multiply combined excitations and supported by inclined passive mounts,is proposed.In this model,each sub-system mobility matrices,transfer matrices of kinematics and dynamics between sub-systems are derived.Combination of systems is performed and power flow transmission of overall systems is presented by the sub-system mobility approach and transfer matrix technique.Some numerical examples are given to show the transmission characteristics of power flow in the isolation systems, and the effects of mounts inclining angles on power flow transmission are analyzed in details.Study shows that inclined mounts can improve isolation efficiency of systems subjected to combined excitations,and make rigid modes slightly shifting.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2010年第5期470-474,共5页
Transactions of Csice
基金
国家自然科学基金资助项目(50805088)
关键词
被动隔振
斜置隔振器
功率流
Passive isolation
Inclined mounts
Power flow
