Calculating the Trajectory of a Cricket Ball with SOLIDWORKS Motion

Predicting the Motion of a Cricket Ball

To predict the motion of a cricket ball being bowled we need to track the ball’s trajectory but also need to understand how it interacts with other elements on the field.

So this motion study accounts for various factors including the initial velocity, spin rate, trajectory set by the bowler, as well as the height of the release point.

As hard as the ground staff try, we have to accept the limitations of the idealised smooth ground plane, as the real pitch comes with numerous imperfections that will influence the ball.

We’ve parametrically modelled up the geometry of the ball, stumps, and bails in SOLIDWORKS to specification, and put them into an assembly to virtually represent a cricket pitch.

The mates (constraints) between these components are carefully split into two groups: those that remain active and those suppressed during the Motion Study to rely on real-world contact interactions.

What is an Accurate Contact Response?

One of the critical aspects of the simulation is the accurate contact response between the ball and other components like the crease, stumps, and bails.

This involves defining the initial position, velocity, and spin rate of the ball, along with accounting for gravitational effects.

SOLIDWORKS includes an extensive library of materials with precise mechanical properties and friction values that we must assign to the components to ensure realistic interactions.

To set up the study, contacts were defined not just between the ball and the crease, but also between the stumps and bails, keeping the bails in position until disturbed by the ball.

Increasing the contact accuracy and lowering the maximum integration step size helps account for the complex contacts, ensuring that every interaction is simulated with high precision.

Can SOLIDWORKS calculate the Effects of ball Spin?

SOLIDWORKS Motion simulation is perfectly capable of calculating the effects of spin and other bowling variations.

The simulation effectively demonstrates how different spin rates, initial velocities, and trajectories affect the motion of the ball, and this is crucial for understanding how various bowling techniques can influence the game.

In SOLIDWORKS Motion we can run several variations of ball position, velocity, and spin rates, generating multiple animations that visualize each of the different scenarios.

How Accurate is SOLIDWORKS Motion?

SOLIDWORKS Motion simulation relies on the MSC Adams solver to get the job done.

And, while this kinetic analysis can provide highly accurate predictions, it’s important to note that the accuracy is contingent upon the data input by the user.

Real-world cricket fields have their own set of imperfections such as slight bows in the crease, stud markings, and weather-induced changes. These factors can affect the ball’s behaviour, making it essential to compare simulation results against actual test data.

However, within controlled parameters, SOLIDWORKS Motion excels in showing the effects of different trajectories, spin rates, and initial velocities.

It also accurately predicts the contact behaviour between the ball and stumps, and stumps and bails, allowing for detailed analysis of contact forces to ensure that components like stumps do not break upon impact.

Additionally, if we pursued some Bazball-esque tactic and decided to try not aiming for the stumps...

SOLIDWORKS could show how the ball’s trajectory changes after hitting the stumps, helping to determine the dispersion area where a wicketkeeper could position themselves effectively to anticipate a snick.

SOLIDWORKS can be used to Predict Sport Performance

We can gain a deeper understanding of sporting mechanics by using SOLIDWORKS Motion simulation.

In theory, we can then use these results to analyse performances on the pitch for informed equipment design or even proposing new strategies.

SOLIDWORKS Motion simulation stands as a robust tool for predicting and analysing the dynamic interactions and can even be applied to the sports field!

And over the next couple of months, we’ll be looking at how SOLIDWORKS can be used to analyse the performance of various sports equipment, and validate how different techniques might impact athlete performance.

So whether it's for improving player performance or designing more resilient cricket gear, it’s fair to say that SOLIDWORKS provides the precision and reliability needed to elevate your game.