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No damping
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A machine tool can be described using equation [1], where :math:`M` is the mass matrix, :math:`D` is the damping matrix and :math:`K` is the stiffness matrix. 

	.. math::
		M \ddot{x} + D \dot{x} + K x = 0 \quad [1]
		

Using the no-damping model, the damping matrix :math:`D` of the reduced system is set to 0, resulting in an undamped system.