Gulfstream, a General Dynamics Company, has utilized Easy5 to assist with design and analysis of a new aircraft's hydraulic system and its downstream users. A model of the hydraulic system was created, implementing tube diameters, line lengths, bend data, reservoir sizing, a dynamic pump model, accumulator size, check valve locations, and filter performance. This model is used to calculate the available pressure at the inlet and exit of each actuator depending on flow requirements. One of the downstream users of the hydraulic system is the Main Entry Door (MED). Models of the door's actuator and damper, which were created in Easy5 as submodels to the system model, were linked to a model of the MED in Adams. The MED model included the door, door's center of gravity location, door hinges, torque tube, actuator and damper cranks, the ground, and all mounting locations. The Easy5 and Adams models interfaced through actuator forces, damper forces, and MED position. The two programs, being linked, allowed for optimization, of the actuator's supply valve and the damper's internal orifices in order to meet the opening and closing requirements of the MED. We also optimized damper snubbing characteristics to minimize door oscillation and ground contact force.

Since their first season in 1983, Newman/Haas/Lanigan Racing has collected eight championships as well as numerous wins, poles and track records with talented drivers such as Mario and Michael Andretti, Nigel Mansell, Paul Tracy, Christian Fittipaldi, Cristiano da Matta, Sebastien Bourdais, Graham Rahal, Bruno Junqueira and Oriol Servia. The Team owes its success to several factors - utilizing the best engineering tools and methods ranking highly on the list. This presentation will provide an overview of how the Team applies MSC Multidisipline together with partner VI-grade's products to transition from reigning Champ Car champions to the front of the grid in the IndyCar Series.

This study demonstrates the efficacy of using MSC ADAMS software for dynamics simulation and malfunction diagnosis of a large mining excavator. An accurate 3D CAD model of major components is initially created and then transferred to ADAMS for simulation. For this simulation, the excavator swing bearing and the crawler traveling system, including the crawler driving gearbox, is modeled based on the actual design parameters of the machine. Constraints and forces to the model are applied as close as possible to real operating conditions. Contact forces are used to model the interaction between rollers and tracks in the swing bearing, between the tumbler and shoes in the crawler system, and between gear pairs in the gearbox. The simulation results revealed dynamics performance of the huge machine in several working conditions, including the forward and backward swing and travel actions. By post-processing the results of the dynamics simulation, techniques for gearbox malfunction diagnosis are possible. The rollers, cages, inner rings and outer rings in bearings are modeled individually and imported to ADAMS in PARASOLID format. The models for shafts are built as flex bodies so that the gearbox can be simulated as a rotor dynamics system, taking into account of the effects of bearing elements contact, gear contact, and shaft elasticity. The signatures for gear faults and bearing flaws are obtained by FFT and wavelet transform.

This paper deals with the development a dynamic simulation model of synchronization system in manual gears transmission, using Adams/View software to investigate the Nibble problem in up-shift 1st-2nd gears when the temperature of transmission oil is minor to 20°C. According to some up-shift effort measurements on test bench of a manual transmission including several oil temperatures, the driver detected the Nibble problem when oil temperature was minor to 20°C, but this problem is more frequent if temperature of transmission oil is -10 °C. The up-shift effort characteristic curve is an unusual curve, which shows two peaks forces as is pointed up by Nibble definition. Using the simulation model of synchronization system, which does not include flexible elements but includes the following components: synchronizer assembly of triple cone, shift fork, shift rail with shift detent in order to maintain in neutral position the shift lever and calculus of shift effort at upper end point of shift lever, was feasible to reproduce the characteristic curve in the similar conditions. Finally, we were able to propose the change to the design in order to eliminate the problem. According to the simulation results, the proposal changes to the design, will decrease just 90% of problem at -10°C of oil temperature in up-shift 1st-2nd gear, but from the measurements results on bench was got a 93% of problem reduction.

The mechanical system components of a climate control system are analyzed using both the traditional engineering tools based process, and a MultiDiscplinary simulation approach. The analysis process under consideration combines both dynamics, and nonlinear implicit finite element analyses. The traditional methods are compared with a process which uses integrated Motion and Structures Workspaces, and a chained analysis paradigm. Lastly, methods for process automation are considered. The results of the process comparison are given with emphasis productivity improvements.