A Second-Order Method for Assembly Tolerance …

1 Copyright 1999 by ASMEP roceedings of the1999 ASME Design Engineering Technical ConferencesSeptember 12-15, 1999, Las Vegas, NevadaDETC99/DAC-8707A Second-Order Method FOR Assembly Tolerance ANALYSISC harles G. GlancyConcurrent Engineering Products GroupRaytheon Systems CompanyDallas, W. ChaseMechanical Engineering DepartmentBrigham Young UniversityProvo, analysis and Monte Carlo simulation are two well-established methods for statistical Tolerance analysis ofmechanical assemblies. Both methods have advantages anddisadvantages. The Linearized Method , a form of linearanalysis, provides fast analysis, Tolerance allocation, and thecapability to solve closed loop constraints. However, theLinearized Method does not accurately approximate nonlineargeometric effects or allow for non-normally distributed input oroutput distributions. Monte Carlo simulation, on the other hand,does accurately model nonlinear effects and allow for non-normally distributed input and output distributions.

3 Copyright © 1999 by ASME of Monte Carlo simulation increases with larger sample sizes. Obviously, the computational effort of large sample sizes can be

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