機械英漢翻譯-機械設(shè)計基礎(chǔ)-展示頁
2024-12-12 01:41本頁面
【正文】 originators were unable or unwilling to explain their acplishments to others． Presentation is a selling job． The engineer， when presenting a new solution to administrative， management， or supervisory persons， is attempting to sell or to prove to them that this solution is a better one． Unless this call be done successfully． the time and effort spent on obtaining the solution have been largely wasted． Basically， there ale only three means of munication available to us． These are the written， the oral， and the graphical forms． Therefore the successful engineer will be technically petent and versatile in all three forms of munication． A technically petent person who lacks ability in any one of these forms is severely handicapped． If ability in all three forms is lacking， no one will ever know how petent that person is! The petent engineer should not be afraid of the possibility of not succeeding in a presentation． In fact， occasional failure should be expected because failure or criticism seems to acpany every really creative idea． There is a great deal to be learned from a failure． and the greatest gains are obtained by those willing to risk defeat． In the final analysis， the real failure would lie in deciding not to make the presentation at all． Mechanical design means the design of things and systems of a mechanical nature machines， products， structures， devices， and instruments． For the most part mechanical design utilizes mathematics， the materials sciences， and the engineeringmechanics sciences． The total design process is of interest to us． How does it begin? Does the engineer simply sit down at his desk with a blank sheet of paper? And， as he jots down some ideas， what happens next? What factors influence or contr01 the decisions which have to be made? Finally, then， how does this design process end? Sometimes， but not always， design begins when an engineer recognizes a need and decides to do something about it． Recognition of the need and phrasing it in so many words often constitute a highly creative act because the need may be only a vague discontent， a feeling of uneasiness， or a 3 sensing that something is not right． The need is usually not evident at a11． For example， the need to do something about a food． packaging machine may be indicated by the noise level， by the variation in package weight， and by slight but perceptible variations in the quality of the packaging or wrap． There is a distinct difference between the statement of the need and the identification of the problem which follows this statement． The problem is more specific． If the need is for cleaner air, the problem might be that of reducing the dust discharge from powerplant stacks， or reducing the quantity of irritants from automotive exhausts． Definition of the problem must include all the specifications for the thing that is to be designed． The specifications are t
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