110 lines
2.2 KiB
Plaintext
110 lines
2.2 KiB
Plaintext
solver
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{
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type Newmark;
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}
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bodies
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{
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M
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{
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type sphere;
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parent root;
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mass 6e4;
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radius 0.01;
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centreOfMass (0 0 0);
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transform (1 0 0 0 1 0 0 0 1) (0 0 0);
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joint
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{
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type composite;
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joints
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(
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{
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type Px;
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}
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{
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type Rz;
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}
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);
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}
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outline
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(
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(0 0.1 0)
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(0.05 0.0866025 0)
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(0.0866025 0.05 0)
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(0.1 0 0)
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(0.0866025 -0.05 0)
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(0.05 -0.0866025 0)
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(0 -0.1 0)
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(0 -2.5 0)
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(0 -0.1 0)
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(-0.05 -0.0866025 0)
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(-0.0866025 -0.05 0)
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(-0.1 0 0)
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(-0.0866025 0.05 0)
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(-0.05 0.0866025 0)
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(0 0.1 0)
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);
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}
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m
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{
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type sphere;
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parent M;
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mass 6e3;
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radius 0.01;
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centreOfMass (0 0 0);
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transform (1 0 0 0 1 0 0 0 1) (0 -5 0);
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joint
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{
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type rigid;
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}
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outline
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(
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(0 2.5 0)
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(0 0.1 0)
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(0.05 0.0866025 0)
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(0.0866025 0.05 0)
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(0.1 0 0)
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(0.0866025 -0.05 0)
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(0.05 -0.0866025 0)
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(0 -0.1 0)
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(-0.05 -0.0866025 0)
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(-0.0866025 -0.05 0)
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(-0.1 0 0)
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(-0.0866025 0.05 0)
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(-0.05 0.0866025 0)
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(0 0.1 0)
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(0 2.5 0)
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);
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}
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}
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restraints
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{
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spring
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{
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type linearSpring;
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body M;
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anchor (0 0 0);
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refAttachmentPt (0 0 0);
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stiffness 1e5;
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damping 0;
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restLength 0;
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}
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}
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// Set the gravitational acceleration
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g (0 -9.81 0);
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// Set the initial offset of the pendulum to 1.5m
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// and the angle of the pendulum to 30deg
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q (1.5 0.5235987);
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deltaT 0.01;
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// It is necessary to iterate for the Newmark solver
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nIter 2;
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endTime 20;
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