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• The qualitative response is the primary focus and therefore no specific dimensions and properties were shown in Figure 1. If needed, these properties can be obtained directly from the attached model file.
• The cable is not being modeled as moving over the pulleys. It Instead, it is directly connected to the pulleys (joints 2 and 3) represented as springs. These springs resist load normal to the cable at the middle point of contact, but not tangentially. There is no consideration of the radius of the pulley.
• Winching (lowering of the mass) is modeled by applying strain load to the vertical cable. This moves the mass downward. Dynamical behavior of the mass is captured. Dynamics of the cable itself is not,presumably it is insignificant.
• Time history load case is used to increase this strain linearly in time, which would correspond to a constant speed of winching.

Discussion of Results

Attachments

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