1) the use of load levels in tests exceeding the operation ones and thus providing high reliability;
2) these tests provide time saving;
3) extreme possibilities of the loads are to take into account their location.
At the same time, strong test conditions result in representation of special
extreme conditions of real operation.
Basic principles of the given approach are known to find application in the modification D of the MIL-STD US standard. Some of these principles were put into practice and their use was considered to have positive effect. Strength and constancy functioning integration tests of radio and electronic equipment for the Moon exploration program “Apollo” is known to prove it.
The test systems described in the works of above mentioned scientists provide the amplitudes and phases' of the vibratory processes representation, search and representation of the object resonance vibrations [4]. However, functional possibilities are limited by univariate test objects and one-coordinate test systems. Using in practice of known resonance test systems does not provide spatial structure objects test operation in the boundary resonance conditions that reduces their reliability. So the problem of multivariate spatial structure objects becomes very urgent and is to be investigated. It is to consist in the research of vibration parameters influence on the vibration state characteristics of the nodes and structural elements.
Aim of the thesis is to reveal synergetic effect peculiarities in the tasks of vibration reliability of spatial structure objects and to substantiate them theoretically.
To achieve the purpose such tasks are to be solved:
1) to work out dynamic models of multivariate objects taking into account the spatial vibration loading types;
2) to analyze and to investigate the spatial structure objects oscillation in the multivariate vibration loading conditions;
3) to investigate the revealing peculiarities of the synergetic effect in the spatial structure objects vibration test problems;
4) to develop spatial structure objects vibration test methods (realized increasing interaction of spatial vibration parameters will executed).
Such methods of the scientific research as: analysis, analytical and applied mechanics, cybernetics and applied mathematics are expected to be used in the work.
Theoretical value of the thesis
On the basis of the synergetic effect theory, worked out in the dissertation the structures and buildings stability and strength theory, and the theory of vibration reliability of the machines, units, aircraft and space technology structures, machines and power machines structure are to be developed.
The empirical value of the thesis
The methods, synergetic effect calculations and research algorithms and computer programs, the structure, vibrostands and systems and devices based on multicoordinate loading are expected to be developed on the basis of the data obtained in the work.
References
1. Wikipedia. 2012. Synergy. [online]. Available from: World Wide Web: http://en.wikipedia.org/wiki/Synergistic [Accessed 1 May 2012]
2. Wikipedia. 2012. Vibration. [online]. Available from: World Wide Web: http://en.wikipedia.org/wiki/Vibration [Accessed 21 April 2012]
3. Шпачук В. П. 2012. Синергизм параметров двухкоординатного ударного нагружения при испытаниях объектов на вибронадёжность. Харьков: ХНАМГ.
4. Specialty Sales LLC. 2012. Caterpillar Compaction Manual. [online]. Available from: World Wide Web: http://www.specialtysalesllc.com/nutra-bond_compaction.htm [Accessed 28 April 2012].
Vibration of linear mechanical systems / H. McCallion. - London: Longman Group Limited, 1995.
ABSTRACT
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