- Tytuł:
- Software for the dynamic analysis of machines placed on elastic pads
- Autorzy:
- Murawski, L.
- Powiązania:
- https://bibliotekanauki.pl/articles/243603.pdf
- Data publikacji:
- 2013
- Wydawca:
- Instytut Techniczny Wojsk Lotniczych
- Tematy:
-
marine engine
elastic foundation of power plant
rigid finite element
elastic pads
rubber couplings
non-linear characteristics of rubber machine elements - Opis:
- Software DYNMACH has been designed for the dynamic analysis (vibrations) of machines placed on elastic foundation pads assuming non-linear foundation characteristics. Floating platforms of marine engines are designed for noise and vibration isolation between ship hull and engine. Excessive loadings acting on ship hull can be also eliminated by elastic foundation. Analysis of that kind of marine machines is the main target of presented software. It has been assumed that the machines are modeled as rigid bodies while the foundation is treated as a set of elements of non-linear elastic-damping characteristics. Software DYNMACH is the implementation of the Rigid Finite Element Method. A machine can be modeled as a single rigid finite element composed of an arbitrary number of elementary rigid bodies. The following rigid body types are available in the library of the program: a plate, a brick, and a full cylinder. Elastic elements used for foundation modeling can have non-linear stiffness and damping characteristics. These characteristics can be assumed as functions of the foundation displacement or the expected excitation frequency. A built system can be loaded by an arbitrary number of static forces. These static forces are used for a preliminary calculation of strains and the centre of equilibrium, as well as for determination of the stiffness and damping coefficients of the non-linear elastic damping elements in the equilibrium position. Program DYNMACH can calculate the frequencies and modes of natural vibration of the loaded system, as well as calculates of system responses to dynamic excitations. Assuming only small vibration amplitudes the dynamic behaviour of the system can be considered as linear, however, this linear behaviour is imposed on the non-linear equilibrium conditions obtained from the solution of the coupled static problem. Database of different types of rubber machines couplings has been build-in the DYNMACH software.
- Źródło:
-
Journal of KONES; 2013, 20, 2; 307-314
1231-4005
2354-0133 - Pojawia się w:
- Journal of KONES
- Dostawca treści:
- Biblioteka Nauki
Artykuł