Multi Body Dynamics in Mechanical Engineering
The simulation of several bodies has become a crucial tool in the design of modern mechatronic systems. Given the emerging trend towards machines and processes that are increasingly faster, lighter, more efficient in terms of energy and more reliable, the flexibility of the mechanism for an accurate estimation of the dynamic behavior of multi-body systems must be taken into account.
Using general-purpose multi-body toolboxes developed internally, methodologies have been designed that allow efficient high-fidelity simulation of large-scale flexible multibody systems. These modeling approaches are exploited in the context of the optimization of the topology of structural components to improve the dynamic response of the system, the evaluation of the life cycle and the identification of the model at the system level.
Through the development of order reduction techniques of parametric and non-linear models, new approaches have been successfully developed and implemented to explain the detailed behavior of gear dynamics in a range of industrial applications. Special attention is also paid to the modeling of key connection components such as bearings and bushings, and the experimental identification of their behavior.
Approaches are being developed based on the reduction of model orders and machine learning to exploit high-fidelity (flexible) multibody models in a range of online and real-time applications. Through directed reformulations of the system dynamics, novel model structures can be obtained that allow low-cost models for the estimation of state input parameters in a complete system configuration. This allows an effective fusion approach for all sensors available in modern mechatronic machines to generate virtual measurements.
Application developments at the component level focus mainly on the impact of contact mechanics on the dynamics of gear transmissions and bearings. System-level validations are carried out in a wide range of applications, such as vehicle dynamics performance evaluation, powertrain dynamics of megawatt wind turbines, high-speed looms, combine harvesters and the evaluation of the operational load of the bearings in integrated industrial machinery.
Other applications are the online characterization of hubs or tire parameters and measurements of energy flow through machines. More information can be found in the virtual sensors section.
Research topics:
Advanced modeling techniques for conical and hypoid gears.
The research focuses on the development of advanced methods for contact detection and calculation of the contact force for bevel and hypnoidal gear pairs, which allows the analysis of components and systems. Due to the complexity of the geometry, special attention is paid to the development of efficient numerical methods for contact detection, taking advantage of the fact that the gear profiles are designed to be close to the conjugate.
Effective flexible multibody formulations.
When considering the efficiency and capabilities of multibody applications, fundamental mathematical formalisms should also be considered. The emphasis here is on the general applicability of the mathematical framework, as well as on scalability towards models of industrially relevant size. This research is an enabling technology for future developments in the fields of state parameter estimation, virtual detection, quantification of uncertainty and design optimization.
Efficient numerical simulation methods to predict dynamic support forces.
The research is in the domain of efficient numerical simulation methods that can be used to provide accurate predictions of the dynamic forces of bearings in advanced/complex machinery. A special focus is on the impact of system flexibility and geometric tolerances on the resulting strength levels and distribution within the bearings.
Simulation at the system level of complex drives.
The scientific challenge of this research is to achieve system-level simulation capabilities of complex transmissions that include 1D multiphysics components with the inclusion of advanced and precise gear contact modeling techniques for the most critical components.
Embed aeroelastic models of aircraft in state observers.
An aeroelastic model describes both the behavior of flexible structural dynamics and the aerodynamics of a system. Topics of interest include estimating distributed forces, models for reduction of aeroelastic models, control and co-simulation. The applications in mind are the monitoring of health and the relief of the burst load of flexible aircraft.
Technosoft Engineering Inc. offers multibody dynamics, fem modeling, explicit dynamics, thermal analysis, and computational fluid dynamics services in the USA from 1999. Our team of qualified and experienced mechanical engineers is proficient in providing engineering services.
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