Coupling of Multibody Dynamics and FEA for Real World Simulation

Advanced multibody dynamics analysis enable our engineers to simulate and test virtual prototypes of mechanical systems in a fraction of the time and cost required for physical build and test. A multibody dynamics (MBD) system is one that consists of solid bodies, or links, that are connected to each other by joints that restrict their relative motion. The study of MBD is the analysis of how mechanism systems move under the influence of forces, also known as forward dynamics. A study of the inverse problem, i.e. what forces are necessary to make the mechanical system move in a specific manner is known as inverse dynamics.

Multibody dynamic analysis is important because product design frequently requires an understanding of how multiple moving parts interact with each other and their environment. From automobiles and aircraft to washing machines and assembly lines – moving parts generate loads that are often difficult to predict. Complex mechanical assemblies present design challenges that require a dynamic system-level analysis to be met.

Accurate modeling can require representations of various types of components, like electronic controls systems and compliant parts and connections, as well as complicated physical phenomena like vibration, friction and noise. MBD analysis enables us to meet these challenges by quickly evaluating and improving designs for important characteristics like performance, safety and comfort.

ESimLab Engineering team use advanced simulation tools for MBD analysis consultant such as MSC ADAMS, Simulia SIMPACK and FUNCTIONBAY RECURDYN with combined/coupled manner with FEA and System modeling sofware such as ANSYS, Abaqus, MSC NASTRAN, MSC MARC and Matlab and Simulink for System modeling for real world simulation of motion and MultiBody Dynamics:

  • Rigid and flexible multibody systems
  • Sensitivity analysis
  • Vibration analysis
  • Vehicle design & testing
  • Coupled control/mechanical system analysis
  • Kinematics and kinetics
  • Contact and friction
  • Loads and displacement
  • Durability and life-cycle analysis
  • Fracture or fatigue calculations
  • Kinetic, static, and dissipative energy distribution
  • Vehicular cornering, steering, quasi-static, and straight-line analysis
  • Control system analysis

Advanced Technology

We resolve any type forming with the most detailed and accurate methodology

Reduce Development Cost

ESimLab FEA service enables you to ensure the manufacturability of parts in the design phase

Test Before Manufacturing

Applied from early on in the part design phase, we can investigate the part manufacturability and performance

Vehicle MultiBody Dynamics Simulation

With MultiBody Dynamic Simulation, you can perform various analyses on the vehicle to test the design of the different subsystems and see how they influence the overall vehicle dynamics. This includes both on- and off-road vehicles such as cars, trucks, motorcycles, buses, and land machinery. Typical full vehicle analysis includes handling, ride, driveline, comfort, and NVH. Automotive models are also used for Realtime applications (HiL, SiL, and MiL). We can also examine the influence of component modifications, including changes in spring rates, damper rates, bushing rates, and anti-roll bar rates, on the vehicle dynamics. Additional Force Elements for the implementation of biomechanical human body models which can be used to analyze ride comfort, handling, occupational safety or other man-machine interactions.
Car Ride
Car Ride simulation allow virtual ride and comfort engineering up-front in the vehicle design process includes the required elements, models, and event definitions for building, testing, and post processing within the ride frequency regime.
Driveline MBD
Driveline MBD simulation provides engineers and analysts with combination of specialized tools including FEA and MBD software such as Ansys, Abaqus, Simpack and MSC Adams for modeling and simulating driveline components and studying the dynamic behavior of the entire driveline during different operating conditions. It can also be used to explore the interaction between the driveline and chassis components, such as suspensions, steering system, brakes, and the vehicle body.
Tire MBD
Using high-fidelity tire model that can be used to simulate maneuvers such as braking, steering, acceleration, free-rolling, or skidding lets us to model the forces and torques that act on a tire as it moves over roadways or irregular terrain for investigating vehicle-handling, ride and comfort, and vehicle durability analyses.
  • Explore the performance of design and refine design before building and testing a physical prototype
  • Analyze design changes much faster and at a lower cost than physical prototype testing would require
  • Model multi-axle, multi-subsystem assemblies
  • Perform component, subsystem, and full-vehicle analyses
  • Explore multiple what if design scenarios

MBD for Engine Analysis

Coupled using of FEA and MBD software such as Ansys, Abaqus, Simpack and MSC Adams simplifies the modeling and analysis of the major components of internal combustion engine systems, such as valves, pistons and crankshafts. This allows us to create and analyze highly realistic engine models quickly and easily including Valve, Piston, Piston Pin, Connecting Rod, Engine Block, Liner Connector, Engine Mount, crank train, crank shaft

MBD for Robot Dynamic

Robot designers can increase the performance of their products by using Coupled FEA and MBD software such as Ansys, Abaqus, Simpack and MSC Adams multibody simulation (MBS) software to simulate the transient dynamic behavior of the complete robot mechanism and control algorithm.Also our engineers use System modeling software with FEA and MBD software to go far beyond kinematic modeling to provide a complete working prototype of the robot and task that it is performing, including handling, manufacturing or anything that can be done in real life. This approach enable us to understand the effects of component deformation, contacts, friction, gear backlash, vibration, etc in design step. so we can calculate the robot trajectory with a much higher level of accuracy. MDB makes it possible to accurately simulate and diagnose the dynamic performance of the robot under any operating scenario prior to building a prototype, making it possible to increase robot performance by evaluating many different design configurations and control algorithms while getting the robot to market earlier by reducing the amount of physical testing that needs to be performed.

Noise, vibration, and harshness (NVH)

Noise, vibration, and harshness (NVH) are critical factors in the performance of many mechanical designs but designing for optimum NVH can be difficult.  While strength and durability limits are being pushed further and further, requirements for noise reduction are becoming more stringent. In addition, focus is increasingly being placed on transmission and powertrain noise because other sources could be reduced meanwhile. Major noise sources in powertrains include clearances in cranktrain bearings, piston liner contacts and contacts in valve trains, timing drives and transmissions. Simulation allows individual mechanical noise sources to be localized and represented very accurately. The elastic multibody dynamics solution with MSC Adams, Simulia Simpack and Ansys Motion connecting FE-based flexible bodies simulation sotware such as Abaqus, Ansys and Nastran including non-linear contact joints, enables the investigation of all noise phenomena of engines and transmissions including gear rattle, gear whine, chain noise and specific phenomena in the driveline. Multibody dynamics and structural dynamics are strongly coupled, taking into account mass, inertia, contacts and flexible structures. But acoustic radiation is usually handled by a weak coupling that requires new models and conversion of data. Connecting the two worlds on a daily basis may lead to loss of information and requires additional manual work. Mechanical analysts who design the products are rarely acoustic specialists. By combining MBD and acoustics in an engineering procedure for design and optimization, an efficient solution is created. ESimLab extremely skilled engineers are experts at utilizing Computer Aided Engineering (CAE) for analyzing fatigue behavior. Our team is highly efficient in applying Adams, Actran, Ansys and Abaqus for solving almost any type of NVH challenges.

Durability and Fatigue Simulation

Durability and Fatigue Simulation is a critical aspect of product development and issues discovered late in the development cycle lead to project delays and budget overruns. In order to achieve the aim of reducing weight for better performance and lower fuel consumption, component engineering of engines and powertrains continues to approach the limits of strength and durability. Durability simulation allows engineers to assess stress, strain or life of components within mechanical systems to design products to last. The solution comprises the whole analysis workflow from dynamic analysis of subsystems and entire powertrains up to stress and fatigue strength evaluation of powertrain components. Outstanding models of lubricated contacts (slider bearings, piston and piston rings) facilitate detailed investigations of the contact behavior, including the prediction of friction and wear.

Coupled MBD and Control Systems

Mechanical systems such as lift systems, cargo equipment, arresting systems, etc. have large loads that are difficult and expensive to determine via physical testing. Multibody Dynamics (MBD) analysis enables us to determine loads and improve the motion of such mechanical systems. Traditional MBD assumes that structural members are fully rigid, but with coupled using of FEA and MBD software such as Ansys, Abaqus, Simpack and MSC Adams, the structural members may be modeled with flexibility and improves the accuracy of MBD. This method may be used to: supply loads for a subsequent structural analysis; provide load histories for fatigue analysis; couple with controls simulation  such as Matlab and Simulink to further improve the performance of mechanical systems while complementing and even reducing the number of physical prototypes. Controls are essential to operating systems such as air management systems, flight controls, and landing gear extension/retraction systems. Controls simulation allows us to predict the performance of controls subjected to numerous configurations. With controls simulation, the complexity of a controls system can be expressed in an easy to understand schematic form and the necessary differential equations used to define the system can be solved.

MBD Simulation of Driveline

ESimLab engineers model and simulate driveline components and study the dynamic behavior of the entire driveline during different operating conditions.
  • Invetstigating the interaction between driveline and chassis components, such as suspensions, steering system, brakes, and the vehicle body
  • Apply a specific torque to driveline model
  • Define a slope of road to study the performance of driveline
  • Alter the driveline geometry and analyze the driveline again to evaluate the effects of the alterations

MBD Simulation of Mechanical Drive Systems

ESimLab engnieers use MBD simulation to evaluate and manage the complex interactions relating to motion, structures, actuation, and controls to better optimize product designs for performance, safety, and comfort. Building functional virtual prototypes of machinery components and systems early in the design cycle, enable our engineering team to perform a series of virtual tests before committing to building a physical prototype. With this solution, machinery manufacturers will reduce the number of prototypes, decrease the design cycle and meet their functional specifications in less time. ESimLab Mechanical Drive Systems MBD Simulation and consultant Service include:
  • Simulation and design of gear pairs, such as Gear ratio, backlash prediction, on the overall system performance.
  • Dynamic behavior of pulley-belt systems, such as transmission ratio, tension and load prediction, compliance studies, or belt dynamics, on the overall system performance.
  • Chain systems performance and optimization include drive ratio, tension, contact forces or chain dynamics, on the overall system performance.
  • MDB Simulation of rolling-element bearings on overall system performance including bearing stiffness, sensitive to internal dimensions, offsets, misalignments, and clearances.
  • Model and analysis of  cable based transmission systems.
  • MDB analysis of cam-follower systems including various combinations of cam shapes, follower motions, follower arrangements and follower geometry.
Reduced Costs
Easier, earlier, quicker analysis enables design simplification, especially on unusual hull designs. Early design correction avoids costly rework in production.
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Quicker Delivery
Reduce project delays caused by late-emerging design changes and rework. Reduce contingency planning.
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Better Design Quality
Easier analysis workflow promotes more thorough design development.
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Reduce Project Risk
Begin construction work with increased confidence. Reduce the risks and contingencies in tackling unconventional designs.
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