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Multibody Simulation (MBS) or Multibody Dynamics (MBD)

Overview of MBS and MBD

Multibody Simulation (MBS) or Multibody Dynamics (MBD) are fundamental methods in mechanical engineering that enable engineers to precisely analyze the dynamic properties of complex systems. This page provides an introduction to the basics of MBS and MBD and their applications in various technical fields.

What are Multibody Simulation and Dynamics?

Multibody Simulation (MBS) is a technique for modeling and analyzing systems composed of multiple moving bodies connected by joints, bearings, springs, dampers, and other mechanical elements. The goal is to calculate the movements and forces within these systems under various conditions. Multibody Dynamics (MBD) focuses on the study of the motion and forces in these interconnected systems, providing a comprehensive understanding of their behavior.

Basic Components of MBS and MBD:

  • Bodies: Rigid or flexible bodies that form the main components of the system.
  • Connections: Joints and bearings that define the relative movement between bodies.
  • Forces: External and internal forces, such as gravity, spring forces, or damping forces.
  • Contacts: Interaction between bodies when they come into contact with each other, including the resulting forces and friction effects, crucial for accurate dynamic simulation of systems where parts interact physically.

Application Areas of Multibody Simulation and Dynamics

MBS and MBD are used in numerous technical disciplines, including:

  • Automotive Industry: Analysis and optimization of suspension systems, drivetrains, and mounts to improve vehicle dynamics and safety.
  • Mechanical Engineering: Investigation of the dynamics of industrial robots, manufacturing machines, and heavy machinery to optimize performance and reliability.
  • Aerospace: Simulation of the motion sequences of aircraft, spacecraft, and satellite mechanisms to ensure functionality and safety.
  • Electronics: Analysis of mechanisms in electronic devices and enclosures to improve durability and performance.

Advantages of Multibody Simulation and Dynamics

  • Precision: Accurate calculation of movements and forces enables well-informed decisions in the design and optimization of technical systems.
  • Efficiency: Virtual modeling and simulation reduce the need for physical prototypes and experiments, saving time and costs.
  • Problem Detection: Early detection of potential weaknesses and issues before they occur in real applications enhances the reliability and safety of systems.
  • Optimization: Analyzing system dynamics allows for optimizations that improve the performance and efficiency of systems.

Methods and Tools

Conducting multibody simulations and dynamics analysis requires specialized software and methods. These tools enable the modeling of systems, the execution of simulations, and the analysis of results. Typical functions of such software include:

  • Modeling: Creation of detailed models of the systems to be examined.
  • Simulation: Execution of simulations under various conditions and scenarios.
  • Analysis: Evaluation of simulation results to identify optimization potential and solutions to problems.


Multibody Simulation (MBS) and Multibody Dynamics (MBD) are powerful tools in mechanical engineering that significantly improve the performance, reliability, and safety of technical systems.

FunctionBay GmbH – Your Partner for Mechanical Engineering and System Dynamics.