Znanstveno-istraživački projekt Ministarstva znanosti i tehnologije Republike Hrvatske, 120-1201787-1786

Glavni istraživač: dr. sc. Zdravko Terze, izvanredni profesor
Fakultet strojarstva i brodogradnje, Zagreb

Sažetak

The computer procedures for numerical simulation of aircraft landing dynamics have great significance in the framework of aircraft design process, structural parts redesign, optimization of aircraft performance as well as for aircraft maintenance and safety. The numerical simulation procedures can be used for testing of different landing regimes, for control of airplane response and stability in the potentially unsafe conditions, and for determination of dynamical loading of structural parts. During last years, these computer procedures were being designed using mathematical formulations of nonlinear dynamics of structural multibody systems. Regarding the objective of the mentioned tasks, with this approach it is possible to model dynamics of aircraft structural subsystems with satisfying accuracy, and to use prepared mathematical models for numerically efficient landing aircraft simulations under different landing conditions.

However, regardless of the possibilities of described approach, recent research proved that for detailed modeling of transient processes (leading to precise estimation of peak stresses, and more accurate estimation of lifting surfaces influence on the coupled landing dynamics) it is necessary to design numerical procedures that take into account the airframe elastic characteristics, as well as their coupling with aerodynamic loads and undercarriage dynamics . In this sense, the project objective is to design multidisciplinary computational environment for dynamic simulation of landing aircraft, by coupling mathematical models and numerical algorithms from the fields of nonlinear multibody dynamics, structural dynamics and computational fluid dynamics. Since these procedures can be based on number of mathematical models and numerical algorithms, a suitability of significant formulations will be evaluated within the framework of the project.

In this matter, several methods will be evaluated by focusing on two aspects. The first aspect will be mechanical-mathematical justification, if a method is applicable for a particular task. The second aspect will be numerical efficiency and possibility of coupling of certain method with other formulations in the framework of synthesis of multidisciplinary algorithms. The project will propose improvements of the selected methods, and it is anticipated that research results will also include original models and numerical algorithms for solving particular tasks.