Micro Car Leaf Spring Dynamics Modeling And Its Influence On The Vechicle Ride Comfort Study

The car ride comfort is one of the basic characteristics of the car, Ride comfort isdirectly related to the car with safety and comfort.Today, the car is also increasingemphasis on Ride comfort, but also slow the majority of car manufacturers are eachvalued. Previously, the traditional approach to study ride comfort through theprototype trial, commissioning, road simulation experiments, which not onlycost-effective, and long design cycle. In addition, there are some experimentalinsecurity. Now, with the development of virtual prototyping, computer simulation isincreasingly being applied to the study of ride comfort, as well as the use of some ofits analysis aided design tools, it is easier to optimize and improve vehicleperformance parameters.Vehicle Ride Comfort study is a complete system, it is by "road-cars-people"component. Road roughness and vehicle speed constitutes a "input" of vehiclevibration system, body acceleration feel as "output" vehicle vibration system, it isthrough suspension, unsprung mass and elasticity, damping components (tires,suspension, seats, etc.) vibration system components to pass. This paper studies therandom road model, a model of automobile and ride comfort of these three aspects.Based on multi-body system dynamics theory, Macpherson suspension frontsuspension is used longitudinal non-independent suspension leaf spring rearsuspension structure for micro cars as research object, Adams/Car modules, includingthe establishment of front and rear suspension, steering system, stabilizer bar, tires,brakes, power, body systems and human-vehicle chair models, including multi-bodydynamics model. Which the leaf spring as the difficulty of the discrete beam modelingapproach simplifies modeling, and elaborated its modeling principles and theories.Finally, the use of bench built against leaf spring stiffness model validation; whilealso using a K&C bench uniaxial KHAT for front and rear suspension models builtexperimentally verifiedOn the basis of a reasonable accurate model, in accordance with the relevantrequirements of national standard, built on the model of the B?D classl random roadand triangles road bumps pulse pavement ride simulation. In this paper, the seat of thetotal weighted acceleration, tire load, suspension travel and other three indicators Ridecomfort evaluation index. Using ISO2631-1:1997(E) standard basic evaluationmethods for seats at acceleration weighted and evaluated. The evaluation results showed that: when the car is traveling on a B-class road crew felt some discomfort;when the car traveling on the D-class road crew at low speeds have someuncomfortable feeling while traveling at high vehicle speed when the crew feel quiteuncomfortable; car in the triangular pulse input on the health of the crew without anyharm. Finally, by changing the suspension stiffness, damping, and seat stiffness,damping and other parameters to observe the effect on ride comfort.