Description

Base class for continuous band track shoes using rigid treads.

Derived classes specify actual template definitions, using different models for the track web.

#include <ChTrackShoeBand.h>

Inheritance diagram for chrono::vehicle::ChTrackShoeBand:

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Collaboration diagram for chrono::vehicle::ChTrackShoeBand:

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Public Member Functions
	ChTrackShoeBand (const std::string &name)

virtual double	GetMass () const override
	Get the mass of the track shoe.

virtual double	GetPitch () const override
	Return the pitch length of the track shoe. More...

virtual void	Initialize (std::shared_ptr< ChBodyAuxRef > chassis, const ChVector<> &location, const ChQuaternion<> &rotation) override
	Initialize this track shoe subsystem. More...

void	WriteTreadVisualizationMesh (const std::string &out_dir)
	Write the procedurally-generated tread body visualization mesh to a Wavefront OBJ file.

void	ExportTreadVisualizationMeshPovray (const std::string &out_dir)
	Export the procedurally-generated tread body visualization mesh as a macro in a PovRay include file.

Public Member Functions inherited from chrono::vehicle::ChTrackShoe
	ChTrackShoe (const std::string &name)

virtual GuidePinType	GetType () const =0
	Return the type of track shoe (guiding pin). More...

std::shared_ptr< ChBody >	GetShoeBody () const
	Get a handle to the shoe body.

virtual double	GetHeight () const =0
	Return the height of the track shoe.

size_t	GetIndex () const
	Get the index of this track shoe within its containing track assembly.

void	SetCollide (bool val)
	Turn on/off collision flag for the shoe body.

virtual void	Connect (std::shared_ptr< ChTrackShoe > next)=0
	Connect this track shoe to the specified neighbor. More...

Public Member Functions inherited from chrono::vehicle::ChPart
	ChPart (const std::string &name)
	Construct a vehicle subsystem with the specified name. More...

const std::string &	GetName () const
	Get the name identifier for this subsystem.

void	SetName (const std::string &name)
	Set the name identifier for this subsystem.

virtual std::string	GetTemplateName () const =0
	Get the name of the vehicle subsystem template.

void	SetVisualizationType (VisualizationType vis)
	Set the visualization mode for this subsystem.

virtual void	AddVisualizationAssets (VisualizationType vis)
	Add visualization assets to this subsystem, for the specified visualization mode.

virtual void	RemoveVisualizationAssets ()
	Remove all visualization assets from this subsystem.

void	SetContactFrictionCoefficient (float friction_coefficient)
	Set coefficient of friction. More...

void	SetContactRestitutionCoefficient (float restitution_coefficient)
	Set coefficient of restitution. More...

void	SetContactMaterialProperties (float young_modulus, float poisson_ratio)
	Set contact material properties. More...

void	SetContactMaterialCoefficients (float kn, float gn, float kt, float gt)
	Set contact material coefficients. More...

float	GetCoefficientFriction () const
	Get coefficient of friction for contact material.

float	GetCoefficientRestitution () const
	Get coefficient of restitution for contact material.

float	GetYoungModulus () const
	Get Young's modulus of elasticity for contact material.

float	GetPoissonRatio () const
	Get Poisson ratio for contact material.

float	GetKn () const
	Get normal stiffness coefficient for contact material.

float	GetKt () const
	Get tangential stiffness coefficient for contact material.

float	GetGn () const
	Get normal viscous damping coefficient for contact material.

float	GetGt () const
	Get tangential viscous damping coefficient for contact material.

virtual void	SetOutput (bool state)
	Enable/disable output for this subsystem.

bool	OutputEnabled () const
	Return the output state for this subsystem.

virtual void	ExportComponentList (rapidjson::Document &jsonDocument) const
	Export this subsystem's component list to the specified JSON object. More...

virtual void	Output (ChVehicleOutput &database) const
	Output data for this subsystem's component list to the specified database.

Protected Member Functions
virtual double	GetTreadMass () const =0
	Return the mass of the tread body.

virtual double	GetWebMass () const =0
	Return the mass of the web. More...

virtual const ChVector &	GetTreadInertia () const =0
	Return the moments of inertia of the tread body.

virtual const ChVector &	GetWebInertia () const =0
	Return the moments of inertia of the web. More...

virtual const ChVector &	GetGuideBoxDimensions () const =0
	Return the dimensions of the contact box for the guiding pin. More...

virtual double	GetGuideBoxOffsetX () const =0
	Return the offset (in X direction) of the guiding pin.

virtual double	GetBeltWidth () const =0
	Return the width of the CB track belt (in the Y direction)

virtual double	GetToothTipLength () const =0
	Return the length of the flat tip of the tread tooth tip (in the X direction)

virtual double	GetToothBaseLength () const =0
	Return the length of the base of the tread tooth (in the X direction) where the tooth circular profile ends.

virtual double	GetToothWidth () const =0
	Return the width of the one of the tooth profile sections of the tread tooth (in the Y direction)

virtual double	GetToothHeight () const =0
	Return the height from the base to the tip of the tread tooth profile (in the Z direction)

virtual double	GetToothArcRadius () const =0
	Return the radius of the tooth profile arc that connects the tooth tip and base lines.

virtual double	GetWebLength () const =0
	Return the combined length of all of the web sections (in the X direction)

virtual double	GetWebThickness () const =0
	Return the thickness of the web section (in the Z direction)

virtual double	GetTreadLength () const =0
	Return the length of the tread below the web area (in the X direction, tread pad for ground contact)

virtual double	GetTreadThickness () const =0
	Return the thickness of the tread below the web area (tread pad for ground contact)

virtual const std::string &	GetTreadVisualizationMeshName () const =0
	Specify the name assigned to the procedurally-generated tread body visualization mesh.

void	AddShoeContact ()
	Add contact geometry for the tread body. More...

void	AddShoeVisualization ()
	Add visualization of the tread body, based on primitives corresponding to the contact shapes. More...

Protected Member Functions inherited from chrono::vehicle::ChTrackShoe
void	SetIndex (size_t index)
	Set the index of this track shoe within its containing track assembly.

Protected Member Functions inherited from chrono::vehicle::ChPart
virtual void	Create (const rapidjson::Document &d)
	Create a vehicle subsystem from JSON data. More...

Static Protected Member Functions
static ChColor	GetColor (size_t index)
	Get index-specific color (for visualization)

Static Protected Member Functions inherited from chrono::vehicle::ChPart
static void	ExportBodyList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChBody >> bodies)
	Export the list of bodies to the specified JSON document.

static void	ExportShaftList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChShaft >> shafts)
	Export the list of shafts to the specified JSON document.

static void	ExportJointList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLink >> joints)
	Export the list of joints to the specified JSON document.

static void	ExportCouplesList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChShaftsCouple >> couples)
	Export the list of shaft couples to the specified JSON document.

static void	ExportMarkerList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChMarker >> markers)
	Export the list of markers to the specified JSON document.

static void	ExportLinSpringList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLinkTSDA >> springs)
	Export the list of translational springs to the specified JSON document.

static void	ExportRotSpringList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLinkRotSpringCB >> springs)
	Export the list of rotational springs to the specified JSON document.

static void	ExportBodyLoadList (rapidjson::Document &jsonDocument, std::vector< std::shared_ptr< ChLoadBodyBody >> loads)
	Export the list of body-body loads to the specified JSON document.

Friends
class	SprocketBandContactCB

Additional Inherited Members
Static Public Member Functions inherited from chrono::vehicle::ChPart
static ChMatrix33	TransformInertiaMatrix (const ChVector<> &moments, const ChVector<> &products, const ChMatrix33<> &vehicle_rot, const ChMatrix33<> &body_rot)
	Utility function for transforming inertia tensors between centroidal frames. More...

Protected Attributes inherited from chrono::vehicle::ChTrackShoe
size_t	m_index
	index of this track shoe within its containing track assembly

std::shared_ptr< ChBody >	m_shoe
	handle to the shoe body

Protected Attributes inherited from chrono::vehicle::ChPart
std::string	m_name
	subsystem name

bool	m_output
	specifies whether or not output is generated for this subsystem

float	m_friction
	contact coefficient of friction

float	m_restitution
	contact coefficient of restitution

float	m_young_modulus
	contact material Young modulus

float	m_poisson_ratio
	contact material Poisson ratio

float	m_kn
	normal contact stiffness

float	m_gn
	normal contact damping

float	m_kt
	tangential contact stiffness

float	m_gt
	tangential contact damping

Constructor & Destructor Documentation

◆ ChTrackShoeBand()

chrono::vehicle::ChTrackShoeBand::ChTrackShoeBand ( const std::string & name )

Parameters

[in] name name of the subsystem

Member Function Documentation

◆ AddShoeContact()

void chrono::vehicle::ChTrackShoeBand::AddShoeContact ( )

protected

Add contact geometry for the tread body.

Note that this is for contact with wheels, idler, and ground only. This contact geometry does not affect contact with the sprocket.

◆ AddShoeVisualization()

void chrono::vehicle::ChTrackShoeBand::AddShoeVisualization ( )

protected

Add visualization of the tread body, based on primitives corresponding to the contact shapes.

Note that the "primitive" shape for the tread body is a procedurally-generated mesh.

◆ GetGuideBoxDimensions()

virtual const ChVector& chrono::vehicle::ChTrackShoeBand::GetGuideBoxDimensions ( ) const

protectedpure virtual

Return the dimensions of the contact box for the guiding pin.

Note that this is for contact with wheels, idler, and ground only. This contact geometry does not affect contact with the sprocket.

Implemented in chrono::vehicle::m113::M113_TrackShoeBandANCF, chrono::vehicle::m113::M113_TrackShoeBandBushing, chrono::vehicle::TrackShoeBandANCF, and chrono::vehicle::TrackShoeBandBushing.

◆ GetPitch()

double chrono::vehicle::ChTrackShoeBand::GetPitch ( ) const

overridevirtual

Return the pitch length of the track shoe.

This quantity must agree with the pitch of the sprocket gear.

Implements chrono::vehicle::ChTrackShoe.

◆ GetWebInertia()

virtual const ChVector& chrono::vehicle::ChTrackShoeBand::GetWebInertia ( ) const

protectedpure virtual

Return the moments of inertia of the web.

These will be distributed over the specified number of web segments.

Implemented in chrono::vehicle::m113::M113_TrackShoeBandANCF, chrono::vehicle::m113::M113_TrackShoeBandBushing, chrono::vehicle::TrackShoeBandANCF, and chrono::vehicle::TrackShoeBandBushing.

◆ GetWebMass()

virtual double chrono::vehicle::ChTrackShoeBand::GetWebMass ( ) const

protectedpure virtual

Return the mass of the web.

This will be equally distributed over the specified number of web segments.

Implemented in chrono::vehicle::m113::M113_TrackShoeBandANCF, chrono::vehicle::m113::M113_TrackShoeBandBushing, chrono::vehicle::TrackShoeBandANCF, and chrono::vehicle::TrackShoeBandBushing.

◆ Initialize()

void chrono::vehicle::ChTrackShoeBand::Initialize	(	std::shared_ptr< ChBodyAuxRef >	chassis,
		const ChVector<> &	location,
		const ChQuaternion<> &	rotation
	)

overridevirtual

Initialize this track shoe subsystem.

The track shoe is created within the specified system and initialized at the specified location and orientation (expressed in the global frame). This version initializes the bodies of a CB rigid-link track shoe such that the center of the track shoe subsystem is at the specified location and all bodies have the specified orientation.

Parameters

[in]	chassis	handle to the chassis body
[in]	location	location relative to the chassis frame
[in]	rotation	orientation relative to the chassis frame

Implements chrono::vehicle::ChTrackShoe.

Reimplemented in chrono::vehicle::ChTrackShoeBandANCF, and chrono::vehicle::ChTrackShoeBandBushing.

The documentation for this class was generated from the following files:

/builds/uwsbel/chrono/src/chrono_vehicle/tracked_vehicle/track_shoe/ChTrackShoeBand.h
/builds/uwsbel/chrono/src/chrono_vehicle/tracked_vehicle/track_shoe/ChTrackShoeBand.cpp

Description

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Friends

Additional Inherited Members

Constructor & Destructor Documentation

◆ ChTrackShoeBand()

Member Function Documentation

◆ AddShoeContact()

◆ AddShoeVisualization()

◆ GetGuideBoxDimensions()

◆ GetPitch()

◆ GetWebInertia()

◆ GetWebMass()

◆ Initialize()