| 摘要 |
A method for optimising a cycle and optionally high-cycle fatigue test rig, said test being intended to reproduce a support for turbomachine parts, wherein it comprises the steps consisting of determining variable geometric parameters of the support member and/or of the workpiece of the rig, in addition to ranges of variation of these parameters, determining at least one aim to be achieved, a variation in the values of at least a part of the abovementioned parameters having an influence on this aim, modifying one or a plurality of the values of the abovementioned parameters, in the respective ranges of same, and determining those that make it possible to achieve the aim, and producing or modifying a support member and/or a workpiece on the basis of the optimised parameters. |
| 主权项 |
1. Method for optimising a low-cycle, and/or high-cycle, fatigue test rig, said test rig being intended to reproduce a support of turbine engine parts, including a support of at least one blade root on a recess projection of a rotor disc, and comprising a support member which is fixed to a mount and defines at least two bearing surfaces, and a test piece which is connected to traction means for loading the test piece so that it bears against the or each bearing surface of the member, the method comprising the steps of:
determining variable, geometrical, parameters of the support member and/or the test piece, and ranges of variation of said parameters; determining at least one objective to be achieved or optimised, a variation of the values of at least some of the above-mentioned parameters affecting the objective; modifying one or more of the values of the above-mentioned parameters, in the respective ranges thereof, and determining those which make it possible to achieve or optimise the objective so as to identify optimised parameters; and producing a support member and/or a test piece based on fixed parameters and parameters optimised for equipping a new rig, or modifying the support member and/or the test piece of an existing rig based on the optimised parameters, wherein: the support member further comprising two middle portions respectively supporting the two bearing surfaces, each middle portion being connected, on the side opposite the traction means, by a first arm to a base for fixing to the mount and, on the side of the traction means, by a pair of second arms to ends of two parallel crossbars which are at a distance from one another, the opposite ends of the bars being connected by another pair of second arms to the other middle portion; the method includes among the variable parameters at least one dimension of the second arms of each pair, and/or the angle of inclination of said second arms with respect to the corresponding crossbar or with respect to the bearing surface of the corresponding middle portion. |
