Abstract
Flexible suspension system like bogie mechanism type suspension has become to be used for running equipment of crawler-type construction machine especially to improve the comfortability in riding. However, in the running equipment with bogie mechanism, there are many unclear points in the dynamic behavior and loads due to the complicacy. This paper describes a method for modeling of crawler-type running equipment with a bogie mechanism as a multibody system. By using the model, in traveling on a firm ground with a rectangular bump, some simulations to analyze the dynamic behavior are conducted and the acceleration at the operating seat position and the suspension forces are calculated. The simulation results are compared with experimental results and the validity of the simulation method is verified. And the dynamic behavior such as the time histories of suspension forces is discussed related to the behavior of track links and so on. This kind of simulation could be useful for designing and deciding the optimum running system under given environmental, economic and operational constraints.
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