液压支架优化设计中英文版.doc

Struct Multidisc Optim 20, 76–82 Springer-Verlag 2000
Optimal design of hydraulic support
M. Oblak, B. Harl and B. Butinar
Abstract :This paper describes a procedure for optimal determi- nation of two groups of parameters of a hydraulic support employed in the min- ing industry. The procedure is based on mathematical programming methods. In thefirst step, the optimal values of some parameters of the leading four-bar mec- hanism are found in order to ensure the desired motion of the support with min- imal transversal displacements. In the second step, maximal tolerances of the optimal values of the leading four-bar mechanism are calculated, so the response of hydraulic support will be satisfying.
Key words:four-bar mechanism, optimal design, mathematical program- mming, approximation method, tolerance
1 Introduction
The designer aims to find the best design for the mechanical system considered. Part of this effort is the optimal choice of some selected parameters of a system. Methods of mathematical programming can be used, if a suitable mathematical model of the system is made. Of course, it depends on the type of the system. With this formulation , puter support is assured to look for optimal parameters of the hydraulic support (Fig. 1) described by Harl(1998) is a part of the mining industry equipment in the mine Velenje-Slovenia, used for protection of working environment in the gallery. It consists of two four-bar mechanisms FEDG and AEDB as shown in Fig. 2. The mechanism AEDB defines the pa
th of coupler point C and the mechanism FEDG is used to drive the support by a hydraulic actuator.
Fig. 1 Hydraulic support
It is required that the motion of the support, more precisely, the motion of point C in Fig. 2, is vertical with minimal transversal displacements. If this is not the case,the hydraulic support will not work properly because it is stranded on removal of the earth prototype of the hydraulic support was tested in a 333laboratory