Wei Y.,Xidian University |
Wei Y.,XCMG Jiangsu Xuzhou Construction Machinery Research Institute |
Chen J.,Xidian University |
Jing J.,XCMG Jiangsu Xuzhou Construction Machinery Research Institute |
Ma H.,Xidian University
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2012
Based on interval factor method, system dynamic characteristic analysis for interval elastic linkage mechanisms was presented. Its stiffness matrix and mass matrix were discomposed into a sum of matrixes with same interval factors, respectively. By using interval factor method, the interval parameters can be all expressed as the products of two parts corresponding to the interval factors and deterministic value. Based on the Rayleigh's quotient formula, the computational expressions for the lower, upper bonds and mean value of system dynamic characteristic were developed using the interval operations. The effects of the uncertainty of the bar length and radius, mass density and elastic modulus on mechanism dynamic characteristics were studied through an example.