FunctionBay, Inc.

[𝗥𝗲𝗰𝘂𝗿𝗗𝘆𝗻 𝗣𝗮𝗽𝗲𝗿 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁 | 𝗣𝗿𝗲𝗱𝗶𝗰𝘁𝗶𝗻𝗴 𝗘𝗻𝗴𝗶𝗻𝗲 𝗖𝗼𝗺𝗽𝗮𝗿𝘁𝗺𝗲𝗻𝘁 𝗪𝗮𝘁𝗲𝗿 𝗟𝗲𝘃𝗲𝗹 𝗗𝘂𝗿𝗶𝗻𝗴 𝗙𝗹𝗼𝗼𝗱𝗲𝗱-𝗥𝗼𝗮𝗱 𝗗𝗿𝗶𝘃𝗶𝗻𝗴] 𝗯𝘆 𝗧𝗼𝘆𝗼𝘁𝗮 𝗠𝗼𝘁𝗼𝗿 𝗖𝗼𝗿𝗽𝗼𝗿𝗮𝘁𝗶𝗼𝗻 When a vehicle drives through a flooded road, water can enter the engine compartment and rise toward the air intake duct or electrical components, creating reliability concerns. This issue has become more important as modern vehicle designs often use smaller gaps around engine cooling modules and larger undercovers to improve aerodynamics and exterior noise performance. These design trends increase sealing around the engine compartment and can make buoyancy-induced vehicle attitude changes more influential. In this paper, researchers from Toyota Motor Corporation developed a simulation method using 𝗥𝗲𝗰𝘂𝗿𝗗𝘆𝗻 𝗫 𝗣𝗮𝗿𝘁𝗶𝗰𝗹𝗲𝘄𝗼𝗿𝗸𝘀 𝗰𝗼-𝘀𝗶𝗺𝘂𝗹𝗮𝘁𝗶𝗼𝗻 to predict the water level in the engine compartment while considering vehicle motion caused by hydrodynamic forces. #Particleworks performed MPS-based free-surface flow analysis, while #RecurDyn calculated suspension displacement and vehicle attitude under buoyancy and water resistance. The two solvers were strongly coupled so that the fluid forces and vehicle motion could interact with each other. 𝗜𝗻 𝘁𝗵𝗶𝘀 𝘀𝘁𝘂𝗱𝘆, 𝗥𝗲𝗰𝘂𝗿𝗗𝘆𝗻 𝘄𝗮𝘀 𝘂𝘀𝗲𝗱 𝗳𝗼𝗿: - Built a multibody dynamics model consisting of 10 parts, including the vehicle body, tires/wheels, under-springs, and rear beam - Calculated suspension displacement using spring and damper characteristics - Received hydrodynamic forces calculated by Particleworks, computed vehicle attitude, and fed the attitude back into the Particleworks fluid simulation - Compared flexible suspension and rigid attitude models to evaluate the influence of vehicle attitude on predicted engine compartment water level 𝗞𝗲𝘆 𝗳𝗶𝗻𝗱𝗶𝗻𝗴𝘀 𝗶𝗻𝗰𝗹𝘂𝗱𝗲: - The developed method predicted the maximum water level within ±5% of experimental results. - The time histories of both water level and suspension displacement also showed good agreement with testing. - The study further identified two water-rising patterns depending on vehicle speed and water depth: Pattern I, where water mainly enters from the front grille, and Pattern II, where water enters from the gap around the engine undercover. This study shows how 𝗥𝗲𝗰𝘂𝗿𝗗𝘆𝗻 𝗫 𝗣𝗮𝗿𝘁𝗶𝗰𝗹𝗲𝘄𝗼𝗿𝗸𝘀 𝗰𝗼-𝘀𝗶𝗺𝘂𝗹𝗮𝘁𝗶𝗼𝗻 can capture both vehicle attitude and free-surface flow in flooded-road driving, supporting more realistic prediction of water intrusion into the engine compartment. 𝗣𝗮𝗽𝗲𝗿 𝗜𝗻𝗳𝗼𝗿𝗺𝗮𝘁𝗶𝗼𝗻 Title: Development of Prediction Method for Engine Compartment Water Level by Using Coupled Multibody and Fluid Dynamics Journal: SAE Int. J. Passeng. Cars - Mech. Syst. 10(2):2017 ISSN No.: 1946-3995 / e-ISSN 1946-4002 Download: https://lnkd.in/gQfiGpmC #VehicleWading #FSI #CoSimulation

Robot Simulation Used in Many industries using #RecurDyn #FucntionBay #MFBD #MBD #DigitalTwin #Simulation

2026 International Multibody Dynamics Summer School&workshop! #FunctionBay #MFBD #MBD

[𝗥𝗲𝗰𝘂𝗿𝗗𝘆𝗻 𝗣𝗮𝗽𝗲𝗿 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁 | 𝗘𝘃𝗮𝗹𝘂𝗮𝘁𝗶𝗻𝗴 𝗔𝗿𝘁𝗶𝗰𝘂𝗹𝗮𝘁𝗲𝗱 𝗕𝗼𝗴𝗶𝗲𝘀 𝗳𝗼𝗿 𝗠𝗼𝘂𝗻𝘁𝗮𝗶𝗻 𝗧𝗿𝗮𝗺 𝗖𝗼𝗻𝗰𝗲𝗽𝘁 𝗗𝗲𝘀𝗶𝗴𝗻] 𝗯𝘆 𝗛𝗬𝗨𝗡𝗗𝗔𝗜 𝗧𝗥𝗔𝗡𝗦𝗬𝗦 Mountain trams face much harsher track conditions than typical urban rail vehicles, including minimum curve radii of 10 m and gradients up to 180‰. Under these conditions, safe operation requires not only sufficient traction but also kinematically appropriate and stable motion of the vehicle, bogies, and articulation system. The paper “𝗜𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝘀 𝘁𝗼 𝗖𝗼𝗻𝘀𝗶𝗱𝗲𝗿 𝗶𝗻 𝗖𝗼𝗻𝗰𝗲𝗽𝘁 𝗗𝗲𝘀𝗶𝗴𝗻 𝗼𝗳 𝗠𝗼𝘂𝗻𝘁𝗮𝗶𝗻 𝗧𝗿𝗮𝗺: 𝗣𝗮𝗿𝘁 𝟭. 𝗔𝗿𝘁𝗶𝗰𝘂𝗹𝗮𝘁𝗲𝗱 𝗕𝗼𝗴𝗶𝗲” investigates why an articulated bogie is important in mountain tram concept design. The authors compare the existing LOH Mt. tram concept with an EPCV (Example-Primitive-Concept-Vehicle) and evaluate the benefits of articulated bogies using mathematical calculations, 3D-CAD modeling, and RecurDyn-based multibody dynamics simulation. 𝗞𝗲𝘆 𝗳𝗶𝗻𝗱𝗶𝗻𝗴𝘀 𝗶𝗻𝗰𝗹𝘂𝗱𝗲: - Kinematic analysis shows that the articulation point of the existing LOH Mt. tram can deviate when entering a 10 m radius curve. - RecurDyn simulations indicate that, under this condition, the existing structure may face risks of articulation decoupling or derailment. - The EPCV with articulated bogies successfully runs through a virtual test track with sharp curves, longitudinal curves, and a helical section without the same articulation issues. - Both theoretical equations and RecurDyn simulations confirm that a longer wheelbase improves pitching stability. - On inclined track, load transfer in the short-wheelbase model is about 2.1× higher than in the long-wheelbase model. 𝗜𝗻 𝘁𝗵𝗶𝘀 𝘀𝘁𝘂𝗱𝘆, 𝗥𝗲𝗰𝘂𝗿𝗗𝘆𝗻 𝘄𝗮𝘀 𝘂𝘀𝗲𝗱 𝗳𝗼𝗿: - Reproducing the sharp-curve entry behavior of the prototype LOH Mt. tram with a multibody dynamics model - Running simulations including wheel–rail and rack-and-pinion contacts - Checking whether the articulated-bogie EPCV can pass a virtual test track with a 10 m radius curve and an 11° gradient helical section - Comparing axle-load transfer and pitching stability between short- and long-wheelbase vehicle models under changing gradient conditions #RecurDyn #Tram #CAE #Simulation

FunctionBay is exhibiting at the Automotive Engineering Exposition in Yokohama from May 27–29!

[𝗥𝗲𝗰𝘂𝗿𝗗𝘆𝗻 𝗣𝗮𝗽𝗲𝗿 𝗛𝗶𝗴𝗵𝗹𝗶𝗴𝗵𝘁 | 𝐄𝐧𝐡𝐚𝐧𝐜𝐞𝐝 𝐌𝐞𝐜𝐡𝐚𝐧𝐢𝐜𝐚𝐥 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬 𝐭𝐨 𝐞𝐧𝐚𝐛𝐥𝐞 𝐟𝐥𝐞𝐱𝐢𝐛𝐥𝐞 𝐜𝐨𝐧𝐭𝐫𝐨𝐥 𝐚𝐧𝐝 𝐩𝐫𝐨𝐭𝐞𝐜𝐭𝐢𝐨𝐧 𝐢𝐧 𝐀𝐂/𝐃𝐂 𝐠𝐫𝐢𝐝𝐬] 𝐛𝐲 𝐀𝐁𝐁 As renewable energy integration and DC distribution networks expand, grid protection equipment must operate with higher reliability and greater flexibility. For AC/DC circuit breakers, this means withstanding frequent opening and closing operations, rapid switching, and increased mechanical stress. In this context, friction and wear inside the actuator become critical design and maintenance issues. This paper presents the application of graphene-based self-lubricating surface treatments to selected components in circuit breaker actuators. Conventional oil- and grease-based lubrication can degrade or become contaminated over time, especially under demanding environmental conditions, which may lead to changing friction behavior and increased maintenance requirements. In this study, #RecurDyn 𝘄𝗮𝘀 𝘂𝘀𝗲𝗱 𝘁𝗼 𝘀𝘂𝗽𝗽𝗼𝗿𝘁 𝘁𝗵𝗲 𝘀𝗲𝗹𝗲𝗰𝘁𝗶𝗼𝗻 𝗼𝗳 𝘁𝗵𝗲 𝗺𝗼𝘀𝘁 𝗰𝗿𝗶𝘁𝗶𝗰𝗮𝗹 𝗰𝗼𝗺𝗽𝗼𝗻𝗲𝗻𝘁𝘀 𝗳𝗼𝗿 𝗴𝗿𝗮𝗽𝗵𝗲𝗻𝗲 𝗰𝗼𝗮𝘁𝗶𝗻𝗴. The actuator assembly contained hundreds of parts, and it was not practical to measure all relevant stresses empirically. Therefore, the researchers performed FEM analysis using RecurDyn to identify components and contact regions with high mechanical force, friction, and wear potential. 𝐑𝐞𝐜𝐮𝐫𝐃𝐲𝐧 𝐜𝐨𝐧𝐭𝐫𝐢𝐛𝐮𝐭𝐞𝐝 𝐢𝐧 𝐭𝐡𝐞 𝐟𝐨𝐥𝐥𝐨𝐰𝐢𝐧𝐠 𝐚𝐫𝐞𝐚𝐬. ＊Identifying critical parts with high mechanical stress within the actuator ＊Analyzing contact regions during circuit breaker opening and closing operations ＊Evaluating Hertzian pressure at key contact pairs such as the opening shaft/opening hook and closing shaft/closing hook ＊Supporting the selection of components for graphene-based surface treatment ＊Providing insight into internal contact conditions and stress concentrations that are difficult to capture by testing alone 𝐄𝐱𝐩𝐞𝐫𝐢𝐦𝐞𝐧𝐭𝐚𝐥 𝐫𝐞𝐬𝐮𝐥𝐭𝐬 𝐬𝐡𝐨𝐰𝐞𝐝 𝐭𝐡𝐚𝐭, graphene-treated components achieved stable operation over 10,000 opening/closing cycles without additional lubrication, with lower and more stable friction and reduced wear compared to grease-lubricated components. The estimated friction coefficient was about 0.09 for graphene-treated surfaces versus about 0.30 for grease lubrication. 𝐓𝐡𝐢𝐬 𝐜𝐚𝐬𝐞 𝐝𝐞𝐦𝐨𝐧𝐬𝐭𝐫𝐚𝐭𝐞𝐬 𝐡𝐨𝐰 𝐑𝐞𝐜𝐮𝐫𝐃𝐲𝐧 𝐜𝐚𝐧 𝐬𝐮𝐩𝐩𝐨𝐫𝐭 𝐦𝐨𝐫𝐞 𝐭𝐡𝐚𝐧 𝐦𝐨𝐭𝐢𝐨𝐧 𝐯𝐞𝐫𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧. By helping engineers understand contact pressure, friction, and stress concentration in complex mechanisms, RecurDyn can contribute to durability improvement and maintenance reduction strategies. For circuit breakers, actuators, linkage systems, and other equipment where repeated motion and contact wear are important, RecurDyn can be a valuable simulation tool. #RecurDyn #CircuitBreaker #Actuator

[𝗥𝗩 𝗥𝗲𝗱𝘂𝗰𝗲𝗿 𝘀𝗶𝗺𝘂𝗹𝗮𝘁𝗶𝗼𝗻 𝘂𝘀𝗶𝗻𝗴 𝗥𝗲𝗰𝘂𝗿𝗗𝘆𝗻]

RecurDyn will be showcased at the CTI Symposium USA 2026 in Novi, MI, on May 19–20.

[Industrial Multi-Axis Robots] Through simulation, we can validate precise operations and reduce vibrations. Controller validation can also be performed through simulation. Optimal motor capacity selection is one of the main purposes of robot simulation. Additionally, lightweighting for reducing energy consumption can be achieved through simulation. #Simulation #RecurDyn #FunctionBay #MBD #MFBD

[Automated Optical Inspection Vibration Analysis] This video covers the vibration analysis of the Automated Optical Inspection (AOI) machine. The critical bodies in the AOI machine are converted into flexible bodies, allowing for accurate vibration analysis. The vibration shape of the flexible body from the dynamic results can be obtained. #MFBD #MBD #Simulation #functionbay #digitaltwin #RecurDyn