The Load Model of Chosen Element of Underframe with Use the Acceleratrion Signals

Abstract:

Nowadays modern mechanical objects, above all that which are use in special purposes use the most innovative solutions that should increase their functional quality. The maintenance of those mechanical objects involves the high financial expenditures which is strictly connected with the total life cycle costs. To reduce those costs and keep up the mechanical readiness index on acceptable level the condition based maintenance strategy is more and more desirable. This is connected with the total durability of the element and its threshold value. So, in the strategy the tracking of the loss of maintenance potential of analyzed element is necessary and evaluation of the residual durability as well. In the paper, the method of life estimating the chosen element of high mobility vehicle was presented. This class of vehicle is constructed to move in various on-and off-road conditions. In many cases this vehicles play a key role in public utilities and armed forces. Very often the high mobility chassis has been used to create a special purpose vehicle. The total cost of life cycle this class of vehicles is considerable, so a method to check the loss of maintenance potential of vehicle is desirable . To solve this problem and draw up a mechanical and maintenance characteristics of a vehicles profiled ground tests have been created and various tests have been carried out . This approach have been time consuming and very expensive. What is more, results of tests are strictly connected with sort of roads selected to tests and depends on a lot of random variables. So, a worked out characteristics are statistically correct rather for the whole group of vehicle than to every single one. The proposed method is able to track the loss of maintenance potential of a critical element of every one vehicle of this class in real road condition. The method joins possibilities of calculating the load in frequency domain with fatigue strength of the most loaded points in an analyzing unit according to its FEM model. The developed method enabled to characterize relationship of decrease of maintenance potential of the critical element in terms of the type of the road and surface, and the speed of movement . The method makes it possible to forecast the residual work capacity expressed in units of time and after taking the speed of movement into consideration, also mileage expressed in kilometers.

• Periodical: Advanced Materials Research (Volume 1036)
• Pages: 604-607
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1036.604
• Online since: October 2014
• Authors: Mariusz Kosobudzki*
• Keywords: Condition Based Maintenance, High Mobility Wheeled Vehicle, Maintenance Potential, Prognostic Health, Usage Maintenance System

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