摘要
以工程实际中具有复杂结构的非线性转子系统为研究对象,以有限元分析软件和多体动力学仿真软件为平台,建立参数化刚柔混合非线性转子动力学模型,对转子系统进行动力学仿真,并结合神经网络技术,随机摄动技术,可靠性设计和可靠性灵敏度设计相关理论,建立动态应力可靠性模型,提出对具有复杂结构的非线性转子系统的可靠性灵敏度设计的新方法,研究设计参数的改变对转子系统可靠性的影响,得到可靠性对基本随机变量均值和方差的灵敏度,在基本随机变量是混合变量的情况下对其灵敏度进行量纲一化,将各个基本随机变量对可靠性的影响程度进行排序,为产品在设计阶段提供理论参考,有着积极的现实意义和理论价值。
A nonlinear rotor system with complex structure in engineering is studied and the finite element analysis software and the multi-body dynamics simulation software are used to establish and analyze the parametric dynamic model of the rigid-flexible rotor system.The dynamic simulation of the rotor system is carried out and the dynamic stress model for reliability analysis is established on the basis of artificial neural network（ANN） technique,stochastic perturbation method,reliability design and reliability-based sensitivity design theory.Thus,an efficient method is proposed to compute the reliability-based sensitivity of the non-linear rotor system with complex structure.The influence degree of the designed parameters on the reliability of rotor system is discussed,and the sensitivity of reliability to the mean value and variance of original random parameters is obtained.On condition that the units of original random parameters are different,the sensitivity is transformed into dimensionless value and each basic random variable is then sequenced by the influence degree of reliability.The proposed method provides theoretical reference for the mechanical product design,thus having realiseic significance and theoretical value.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2011年第2期159-165,共7页
Journal of Mechanical Engineering
基金
长江学者和创新团队发展计划
'高档数控机床与基础制造装备'科技重大专项课题(2010ZX04014-014)
国家自然科学基金(50875039)
'十一五'国家科技支撑计划(2009BAG12A02-A07-2)资助项目
关键词
转子系统
非线性
动力学
可靠度
灵敏度
Rotor system Non-linear Dynamics Reliability Sensitivity
