摘要
针对驱动桥在使用过程中会受到随时间变化的不确定性因素的影响,建立了基于随机微分方程的驱动桥时变设计数学模型,并结合多元随机变量的分布参数,提出了考虑不确定性因素的驱动桥零件时变设计方法,并以半轴的时变设计作为算例进行了说明.该方法考虑驱动桥零件强度和应力的动态演化,使驱动桥产品的可靠性得到动态安全评价.算例设计体现了时间尺度对设计的影响,并在满足性能要求的前提下有效地减少了零部件的尺寸.
As uncertainties of inherent factors （such as loads, environment and material properties） always exist during driving axle＇s lifetime, a time-dependent model incorporating such uncertainties was established based on stochastic differential equation theory. Combined with the distribution parameters of multiple random variables, the time-dependent design method of driving axle parts under uncertainties in stress and strength was presented and it was illustrated by taking the shaft＇s time-dependent design as an example. It is indicated that this method, with good prospects, can make dynamic security evaluation of reliability for driving axle products. The shaft＇s time-dependent design reveals the impact of time scale on the design. Under the premise of meeting the performance requirements, it could effectively reduce the size of parts.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2011年第7期785-789,共5页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(51075029)
北京市自然科学基金资助项目(3093022)
关键词
驱动桥
时变
不确定性
应力
强度
driving axle
time-dependent
uncertainty
stress
strength
