Vehicle Ride

Pitch is a phenomenon that occurs in response to the acceleration and braking forces. Pitch is the front and rear motion of a car about an axis that extends from the left to right of a vehicle and through the center of gravity i.e. the transverse axis. Pitch angle is the angle that the body makes in side-view. Pitch is…

The double wishbone assembly used for this problem is as follows:- The initial hard points are as follows:- Using this model, parallel wheel travel simulation was performed as shown below:-   For achieving the given targets, hard points were optimized as shown below:-   The values of required parametes are as…

1) Graph styles, titles, labels:-   2) Plot configuration files - export & import:- i) Export - ii) Import -   3) Export Numeric Data:- i) Data exported to notepad - ii) Data exported to spread sheet- iii) Data exported to HTML -    iv) Import numeric data and plot:-   5) Animations, Cameras…

The double wishbone assembly is as shown in the below:-  

Given :- Total Weight = 1900 kg F/R distribution = 55% Front Unsprung mass front = 90 kg Unsprung mass rear = 60 kg Solution :- i) a) Front sprung mass critical damping = 2 * sqrt (Kr * ms)  Front Ride rate, Kr = (Ks * Kt)/(Ks + Kt)                      = (20*250)/(20+250)…

1) Wheel rate is usually different from spring rate because the wheel and the spring are mounted at different distances from the pivot point. Thus, a concept of motion ratio comes into picture. Motion ratio is a geometric measure that relates the change in displacement of force element to a change in vertical wheel center…

1) Given :- Wheel base = 2700 mm Speed = 60 kmph = 60 * 1.6 * 5/18 = 26.67 m/s Front sprung mass natural frequency target at design = 1.15 Hz Solution :- i) Due to wheel base separation, the time lag between front and rear suspension is  T = wheelbase/speed = 2.7/26.67 Time lag = 0.101 s For flat ride, after striking…

1)  i) Caster = 5.38° ii) Mechanical Trail = 9.41 mm iii) Kingpin inclination angle = 10.01° iv) Scrub radius = 32.35 mm v) Kingpin lateral offset or spindle length = 85.29 mm The detailed solution can be found in the attached excel sheet.   2) Given:- Pneumatic Trail = 25 mm Lateral Force = 2000 N Solution:-…

Given:-  Tire Radius = 300 mm Wheel Track = 1600 mm   Assumptions:- The setup consists of links rather than control arms Center of left tire contact patch in the front view is the origin (0,0) Only Y-Z plane is under consideration   Solution:- The solution can be found at the below link and excel file is…