Description: The design of the EC carriage is based on the design of the CC carriage documented in D-0 Engineering Note 3740.215-EN-14. The non-symmetric weight distribution of the EC cryostat results in uneven loading of the arms of the EC carriage. The design load on each rear arm is 220,000 lb, while each front arm supports 40,000 lb. (The CC carriage design load was 200,000 lb on all four arms.) ANSYS finite element models were made representing various combinations of plate thicknesses in an attempt to balance the deflections of the arms. In the final design a 3/4-inch curved top plate is used with an additional 1.75-inch thick 'doubler plate' incorporated into the rear arms. The bottom flanges are 2-inch and 3/4-inch for the rear and front arms, respectively. Web plates are 3/4-inch for all arms. The carriage bottom plate is 2-inch thick, and other details are similar to the CC design.
Date: February 26, 1991
Creator: Weber, K. & Luther, R.
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