Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : February 28, 2017 - March 03, 2017
The drum shearer is one of the main equipment of the long-wall mining system that has been widely used in coal mining for decades. Influenced by large fluctuation and intensive impact of drum load, the drum driving system is a weak part of the drum shearer due to the large dynamic deformation on cutting unit housing and changes of gear meshing state. This study is concerned with hybrid finite element/lumped parameter dynamic modeling of the housing-transmission coupled system. The influence of housing topological optimization on the dynamic characteristics of gear is also analyzed through the hybrid dynamic model. In order to model the drum driving system, it is subdivided into two substructure: housing and transmission system, the housing is modeled by finite element method while the transmission system is modeled by lumped parameter method. Then the dynamic substructuring method (DSM) is used to develop a hybrid dynamic model, taking elastic coupling between the housing and transmission system into consideration. The housing topological optimization is conducted through the Optistruct solver in Hypermesh, aiming at increasing the natural frequency of housing. The effect of topological optimization on reducing the gears' equivalent mesh misalignment is validated through dynamic analysis under both random and step load.
