More on the Development of Rigidity Evaluation Techniques of Freight Car Structures and Their Components in the Design and on Trials. Adjustment of Design Loads

More on the Development of Rigidity Evaluation Techniques of Freight Car Structures and Their Components in the Design and on Trials. Adjustment of Design Loads

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While justifying selection of steel grades for replaceable cast Fridge Roller Base parts as well as service life and interrepair run guidelines of freight cars to be operated on the JSC RZD network it is necessary to take into account its severe climatic environment.The authors highlight the appropriateness of examination of metal specimens taken from tank-car thin-walled shells being in service for as long as 10 to 20 years in order to identify loss of the shell material ductility.The specimens must be cut out at areas where shells are fixed to the tank-car frames.Within the framework of conformity validation strength assessment of welded car components shall be performed on the basis of static and impact tests in terms of the I and III regimes as in the design and calculation norms related to 1520 mm gauge railway cars of MPS-Russia (non-self-propelled ones).

Exception to this applies to cars with welded solebars and a long distance between truck centers.In this case strength conformity assessment shall be based on the endurance tests results.Underframe bolster ends of freight cars intended for transportation by ferry ought to be additionally equipped with two strainers designed for loads 150 kN each.Cars with axle-load exceeding 235 kN ought Bosch NBS113BR0B Serie 2 Built Under 59cm A/B Electric Double Oven Stainless to be equipped in the midpart with additional strainer on each side.

In the case of bridge constructed across the Kerch Strait at a quickened pace it is necessary to consider wind loading on railway rolling stock at the level of 1,250 kPa retaining the value of 500 kph for the rest of the JSC RZD network.