By Edward J. Haug (auth.), Werner Schiehlen (eds.)
The German learn Council (DFG) determined 1987 to set up a national 5 yr learn venture dedicated to dynamics of multibody structures. during this venture universities and learn facilities cooperated with the objective to increase a common pur pose multibody method software program package deal. this idea presents the chance to take advantage of a modular constitution of the software program, i.e. diversified multibody formalisms might be mixed with diversified simulation programmes through standardized interfaces. For the DFG undertaking the database RSYST was once selected utilizing average FORTRAN seventy seven and an item orientated multibody approach datamodel used to be outlined. The venture incorporated • examine at the basics of the tactic of multibody platforms, • ideas for brand spanking new formalisms of dynamical research, • improvement of effective numerical algorithms and • recognition of a robust software program package deal of multibody platforms. those objectives required an interdisciplinary cooperation among arithmetic, compu ter technology, mechanics, and keep watch over idea. ix X After a rigorous reviewing approach the subsequent examine associations participated within the undertaking (under the accountability of prime scientists): Technical college of Aachen (Prof. G. Sedlacek) Technical college of Darmstadt (Prof. P. Hagedorn) collage of Duisburg M. Hiller) (Prof.
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Additional resources for Advanced Multibody System Dynamics: Simulation and Software Tools
On every part a unique frame is defined to be the part reference frame. Often one of the frames of an interaction element or the center of mass of the part are used as part reference frame. Additional frames on a part are defined with respect to a reference frame which is either the part reference frame or another already defined frame. In Figure 3, every frame is connected with its corresponding reference frame by a dashed line with an arrow. By definition, the frame reference topology on a part is always a tree structure with the part reference frame as the root .
Clau: connect name type apart name aframe name bpart name bframe name min maz default , , ~ ,, ~ unit description of component name of apart name of aframe on apart name of bpart name of bframe on bpart Class member defines the type of the interaction. Between two coordinate systems, one joint, several force elements, and several sensors are allowed. class: member name class description of component joint joint joint element on interact object force setof (force) force elements on interact object sensor setof (sensor) sensor elements on interact object A joint connects a coordinate system on a first part ( = aframe) with a coordinate system on a second part ( = bframe).
2 Methods The second part of a class description consists of the specification of the available methode. The data model supports two groups of methods: Administrative methods are used to manage and manipulate data objects and to access data values. At least the following operations are supported: access to objects in main memory (initialize new objects; delete existing objects; read and write components and data values; query attributes) , transfer of objects from database to main memory and vice versa, and manipulation of objects on database (delete objects; copy objects; rename objects; browse objects).