Presents the study on the pressure and friction fields of the lubricant film on the surface of a large thrust elastic metal plastic bearing bush in a hydraulic turbine using the method of finite element analysis and t...Presents the study on the pressure and friction fields of the lubricant film on the surface of a large thrust elastic metal plastic bearing bush in a hydraulic turbine using the method of finite element analysis and the stress and displacement fields in the vertical direction of the bush surface obtained to provide a theoretical basis for the design of contour lines and investigation into the causes for destruction of bushes, and concludes with test results that 1) the stress on the surface of the bush is not uniform; 2) a tension stress tends to occur near the oil ingress and egress edges but it is minor; 3) the biggest displacement in the vertical direction appears where x=84 and Y=1 153 and has a value of 0.022 mm; 4) the deformation of the bearing bush is harmful to the maintenance of lubricant film.展开更多
Design and optimization of bushing at present mainly use the traditional experience method.The relevant research that adopts computer simulation to carry on the operation behavior of the bushing has appeared in recent...Design and optimization of bushing at present mainly use the traditional experience method.The relevant research that adopts computer simulation to carry on the operation behavior of the bushing has appeared in recent years.How to use the finite element method to research bushing was introduced in the article.Physics fields and many relevant parameters of one real bushing were calculated.Through the results of calculation,it indicate that the finite element method is very useful in bushing research of designing and optimizing.展开更多
以某型号着陆器软着陆机构为研究对象,采用MSC.Patran/Nastran对软着陆机构进行模态分析,得到结构模态的主要影响因素,主要包括机构尺寸和装配连接方式.主要分析了软着陆机构中主支柱、辅助支柱活塞杆和活塞筒壁厚、以及活塞筒端盖厚度...以某型号着陆器软着陆机构为研究对象,采用MSC.Patran/Nastran对软着陆机构进行模态分析,得到结构模态的主要影响因素,主要包括机构尺寸和装配连接方式.主要分析了软着陆机构中主支柱、辅助支柱活塞杆和活塞筒壁厚、以及活塞筒端盖厚度对模态频率的影响,并对主支柱、辅助支柱活塞杆和活塞筒装配连接方式进行研究,接着提出一种基于Bush单元的装配连接方式,有效地解决了传统方法中用MPC(Multiple Point Constraint)刚性连接来模拟装配连接的不足,使仿真结果更加准确.最后对收拢状态下的模型进行了频率响应分析,结果发现在给定的频率范围内结构不会发生共振,进一步说明结构设计的合理性.展开更多
文摘Presents the study on the pressure and friction fields of the lubricant film on the surface of a large thrust elastic metal plastic bearing bush in a hydraulic turbine using the method of finite element analysis and the stress and displacement fields in the vertical direction of the bush surface obtained to provide a theoretical basis for the design of contour lines and investigation into the causes for destruction of bushes, and concludes with test results that 1) the stress on the surface of the bush is not uniform; 2) a tension stress tends to occur near the oil ingress and egress edges but it is minor; 3) the biggest displacement in the vertical direction appears where x=84 and Y=1 153 and has a value of 0.022 mm; 4) the deformation of the bearing bush is harmful to the maintenance of lubricant film.
基金National Science Foundation of China Yunnan United Foundation.(U0837601)the Natural Science Foundation of Yunnan Province,China(2010CF126)
文摘Design and optimization of bushing at present mainly use the traditional experience method.The relevant research that adopts computer simulation to carry on the operation behavior of the bushing has appeared in recent years.How to use the finite element method to research bushing was introduced in the article.Physics fields and many relevant parameters of one real bushing were calculated.Through the results of calculation,it indicate that the finite element method is very useful in bushing research of designing and optimizing.
文摘以某型号着陆器软着陆机构为研究对象,采用MSC.Patran/Nastran对软着陆机构进行模态分析,得到结构模态的主要影响因素,主要包括机构尺寸和装配连接方式.主要分析了软着陆机构中主支柱、辅助支柱活塞杆和活塞筒壁厚、以及活塞筒端盖厚度对模态频率的影响,并对主支柱、辅助支柱活塞杆和活塞筒装配连接方式进行研究,接着提出一种基于Bush单元的装配连接方式,有效地解决了传统方法中用MPC(Multiple Point Constraint)刚性连接来模拟装配连接的不足,使仿真结果更加准确.最后对收拢状态下的模型进行了频率响应分析,结果发现在给定的频率范围内结构不会发生共振,进一步说明结构设计的合理性.
