A Numerical Method of Large-Scale Concrete Displacing Boom Dynamics and Experimental Validation
Wu Ren, Yun-xin Wu, Zhao-wei Zhang, Wen-ze Shi, Advances in Mechanical Engineering, January 2014, Volume 6 943847.
Abstract
Concrete displacing boom is large-scale motion manipulator. During the long distance pouring the postures needs to frequently change. This makes the real-time dynamic analysis and health monitoring difficult. Virtual spring-damper method is adopted to establish the equivalent hydraulic actuator model. Besides boom cylinder joint clearance is taken into account. Then transfer matrix method is used to build the multibody concrete placing boom model by dividing the system into two substructures. Next typical working conditions displacements and accelerations during the pouring process are studied. The results of the numerical method are correct and feasible compared with RecurDyn software and the experimental ones. So it provides reference to the real-time monitoring and structure design for such light weight large scale motion manipulators.
How Multibody Dynamics Simulation Technology is Used
A numerical method for concrete-displacing boom dynamics is developed and found to be in good agreement with RecurDyn and experimental results. RecurDyn simulations offer validity to the numerical and experimental methods while providing additional information that may not be available with instrumentation.
