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Dynamic simulation of wire rope with contact
Etsujiro Imanishi,Takao Nanjo,Takahiro Kobayashi 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.4
We present a dynamic simulation of a wire rope involving both contacts with a winch drum and hydraulic systems using the finite element method. Rapid winch operation often causes disorderly winding of the wire rope, which is an important quality problem. Dynamic simulation is, therefore, required for design of the hydraulic winch system on construction machinery. The wire rope is modeled using by truss elements considering large displacement motion. The contact between the wire rope and the winch drum is modeled using by variable-length truss elements and bilinear spring elements. An improved Newton method is proposed for nonlinear dynamic analysis. Simulation results show that some lever operations result in rope looseness and intense pressure fluctuation.
A Time Integration Method for Analysis of Dynamic Systems Using Domain Decomposition Technique
Takeshi Fujikawa,Etsujiro Imanishi 대한기계학회 2005 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.19 No.1S
This paper presents a precise and stable time integration method for dynamic analysis of vibration or multi body systems A total system is divided into several subsystems and their responses are calculated separately, while the coupling effect is treated equivalently as constant force during time steps By using Iterative procedure to Improve equivalent coupling forces, a precise and stable solution is obtained Some examples such as a seismic response and multi body analyses were carried out to demonstrate Its usefulness<br/>