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MN LAW, a project engineer working for Perkins Engines, has en awarded a PhD by Nottingham University.

13th February 1982
Page 11
Page 11, 13th February 1982 — MN LAW, a project engineer working for Perkins Engines, has en awarded a PhD by Nottingham University.
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ihe degree was awarded for Law's work on the design of a w computer program which ?diets the main bearing and inkshaft loading in the internal mbustion engine.

ihe theory incorporated into new program is claimed to a major advance on that cur ly used within the British )tor industry.

fraditional methods make no owance for the flexibility of the engine and crankshaft, nor the behaviour of the lubricating oil films.

The Perkins program allows for these factors and is claimed to provide a much more accurate calculation method.

The crankshaft and cylinder block structures are modelled within Dr Law's program using the finite element technique which allows the flexibility of complicated structures to be cal culated accurately by dividing them into a myriad of regular shape pieces and elements.

Equations of elasticity are applied to each of these elements which are then assembled within the computer to construct a mathematical model of thousands of such equations.

The program incorporates a formulation developed in the USA which allows the thicknesses of all main-bearing oil films to be determined at any point within the engine cycle.

The heart of Dr Law's program is concerned with the combination of the structural and oil films' representations within known loads on the pistons and the weight of all the components to provide an accurate figure for the force on the bearings and crankshaft.

The information provided by the new program is currently being used in both the design of new engines and in the improvement of current units.

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Organisations: Nottingham University
People: MN LAW

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