Abstract
Abstract The road loads from mobile cranes have been a source of concern for highway agencies for many years, and this has been reflected in the axle loads that are allowed for such machines. A companion paper (Burkett, G. W., McDonald, J. T., Velinsky, S. A. (2004 Burkett, G. W., McDonald, J. T. and Velinsky, S. A. 2004. Dynamic road load simulation of transportable cranes. Mechanics Based Design of Structures and Machines, 32(3): 329–362. [CROSSREF][Taylor & Francis Online], [Web of Science ®] , [Google Scholar]). Dynamic road load simulation of transportable cranes. Mechanics Based Design of Structures and Machines, to appear) discusses a model used to simulate and evaluate road loads of transportable cranes with various configurations and suspensions. This paper provides the detailed models for the suspension types commonly found on such cranes, and then it uses a quarter-truck model to establish each suspension's characteristics. Filtering characteristics of the suspensions are established through the frequency response of the dynamic tire force with respect to a road velocity input and provide an effective means of qualitative comparison among the suspensions. Furthermore, the sensitivity of the dynamic response of the suspensions to various design parameters is examined. The companion paper then uses the suspension models and develops a quantitative analysis of the road loads due to transportable cranes.
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