RESEARCH PAPERS: Mechanisms Papers

Some Advantages of Product Criteria in Component Optimization

[+] Author and Article Information
Max L. Brown

Department of Mechanical Engineering, University of Cincinnati, Cincinnati, Ohio

J. Eng. Ind 95(3), 751-754 (Aug 01, 1973) (4 pages) doi:10.1115/1.3438220 History: Received June 06, 1972; Online July 15, 2010


In optimum design the optimizing criterion is a mathematical compromise among performance, cost, life, and conformity to constraints. This paper makes use of the fact that for every linear sum criterion there exists an equivalent product criterion which yields the same solution (extremum function). A method to obtain the proper form of this criterion is presented along with several distinct advantages of using it, including: (1) elimination of the variable “constant” which changes whenever a constraint changes (such as Lagrange multipliers); (2) separation of independent solutions (such as material and shape); (3) great reductions in the work required to obtain a solution when the mathematical models take the form of products. These advantages are demonstrated in three example problems utilizing a novel approach to finding the functions which render products of definite integrals extremum.

Copyright © 1973 by ASME
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