Skip to main content
Fachgebiete
Automobil + Motoren Bauwesen + Immobilien Business IT + Informatik Elektrotechnik + Elektronik Energie + Nachhaltigkeit Finance + Banking Management + Führung Marketing + Vertrieb Maschinenbau + Werkstoffe Versicherung + Risiko
DE
EN
Bücher
Zeitschriften
Themenseiten
Organisationspsychologie Projektmanagement Marketing Smart Manufacturing
Weitere Formate
Podcasts Webinare Technik Webinare Wirtschaft Kongresse Veranstaltungskalender Awards
Jetzt Einzelzugang starten
Zugang für Unternehmen
Referenzkunden
SLX-Digitalkonferenz: Zukunftswerkstatt 2024

Mehr Umsatz mit Top-Kontakten

Am 7. Mai erfahren Sie, wie Vertriebsteams Leadgenerierung, Leadnurturing und Leadstrategien effizient steuern können.
Erweiterte Suche
Anmelden
nach oben

1985 | Buch | 2. Auflage

Introduction Kapitel lesen Erstes Kapitel lesen

Conceptual Design for Engineers

verfasst von: M. J. French, MA MSc FIMechE

Verlag: Springer Berlin Heidelberg

Enthalten in: Professional Book Archive

Einloggen, um Zugang zu erhalten
insite
SUCHEN

Über dieses Buch

3. 2 Making capital and running costs commensurate 49 3. 3 Optimum speed of a tanker 50 3. 4 The optimisation of the sag:span ratio of a suspension bridge 52 3. 5 Optimisation with more than one degree of freedom: heat exchanger 55 3. 6 Putting a price on heat-exchanger performance 57 3. 7 Variation of costs with application 59 3. 8 Further aspects of heat-exchanger optimisation 59 3. 9 An elementary programming problem 60 3. 10 Classification of optimisation problems and methods of solution 62 3. 11 The design of rotating discs: an optimum structure 66 3. 12 Hubdesign 73 3. 13 Summary 73 Questions 73 Answers 74 4 Insight 4. 1 Introduction 76 4. 2 Rough calculations 76 4. 3 Optimisation of compressor shaft diameter 83 4. 4 The optimum virtual shaft: a digression 85 4. 5 Useful measures and concepts 87 4. 6 Bounds and limits 91 4. 7 Scale effects 94 4. 8 Dimensional analysis and scaling 98 4. 9 Proportion 99 100 4. 10 Change of viewpoint Questions 102 104 Answers 5 Matching 5. 1 Matching: the windlass 107 5. 2 An extended example of matching: ship propulsion 107 5. 3 Matching within a single machine III 5. 4 Further aspects of ship propulsion 112 5. 5 Specific speeds: degrees of freedom 113 5. 6 Matching of a spring to its task liS 5. 7 Matching in thermodynamic processes 117 5. 8 Two old cases of matching 121 5.

Inhaltsverzeichnis

Frontmatter
1. Introduction
Abstract
In this book ‘design’ is taken to mean all the process of conception, invention, visualisation, calculation, marshalling, refinement, and specifying of details which determines the form of an engineering product.
M. J. French
2. Combinative ideas
Abstract
A design problem might be tackled on the following lines: take all the possible elements that might enter into a solution, combine them in all possible ways, and then select the best combination.
M. J. French
3. Optimisation
Abstract
In the last chapter we considered the problem of how to select the best arrangement or combination of means for performing a given function. The variations under consideration were of kind, not of degree. But even when all decisions of kind have been made, so that all the qualitative aspects are settled, there remains the easier problem of fixing all the quantities involved. The solution of this problem we shall call ‘optimisation’.
M. J. French
4. Insight
Abstract
Perhaps the most important single prerequisite for good solutions to design problems is insight (see Section 1.4). From numerous instances [2] it may be inferred that insight frequently develops by large steps—it ‘dawns’ or ‘comes in a flash’—but the steps are separated by laborious stretches of mental spadework.
M. J. French
5. Matching
Abstract
As in many other fields of human enterprise, it is helpful when we come upon an aspect of a design problem that has strong affinities with others we have met. Two such aspects, called here ‘matching’ and ‘disposition’, will be treated in this chapter and the next.
M. J. French
6. Disposition
Abstract
A problem of disposition exists where a limited quantity of some commodity, usually space, has to be shared out to the best advantage between a number of functions. Cases which meet this strict definition are not very common, but cases exhibiting similar features abound, so that the approaches discussed in this chapter are of very wide application.
M. J. French
7. Kinematic and elastic design
Abstract
While it is not the purpose of this book to discuss special items in the engineering repertoire, the complementary ideas of kinematic and elastic design are so important as to warrant an exception.
M. J. French
8. Costs
Abstract
There is a great deal of truth in the aphorism, ‘An engineer is a man who can do for one dollar what any fool can do for two’, and no designer should be ashamed that the reduction of cost is the chief test of his skill. However, the cost in question must be the true or total costs for the same benefit, not just the purchase price, and must include running costs, maintenance, the costs of unreliability and so on. The means of making such costs commensurate are not part of design, but one important aspect has been covered in Section 3.2. The benefit is also difficult to assess in some cases, particularly in consumer goods, where it is hard to judge such things as the money value to the customer of a sunshine roof in a car.
M. J. French
9. Various principles and approaches
Abstract
This chapter collects together various helpful ideas. They are of fairly general application but too vague to merit the title ‘methods’, and they are not dealt with at length.
M. J. French
10. Conclusion
Abstract
The preceding chapters have dealt with various methods and approaches that may be helpful in conceptual design problems. Some of these, like the combinative studies of Chapter 2, are of general application. Others, like the identification and treatment of generic types of problems such as matching (Chapter 5) and disposition (Chapter 6), are only of use in special cases; nevertheless, as the list of topics in Chapter 5 will show, the special cases are so frequent that the approach is of great value. The insight-developing techniques of Chapter 4 are strongly recommended, and the writer believes that the investment of time in such exercises will be amply repaid in better designs more expeditiously arrived at. The advantages of rough calculation of orders of magnitude and ‘quick sums’ in particular cannot be over-emphasised; the optimisations dealt with in Chapter 3 are of this sketchy sort. The space available would not allow of fuller treatments, but in any case these simpler exercises yield perhaps nine-tenths of the possible benefits at a few per cent of the cost. Of course, the heavy calculations that fetch in the remaining tenth are still very worthwhile whenever the sums of money to be spent are large.
M. J. French
Backmatter
Metadaten
Titel
Conceptual Design for Engineers
verfasst von
M. J. French, MA MSc FIMechE
Copyright-Jahr
1985
Verlag
Springer Berlin Heidelberg
Electronic ISBN
978-3-662-11364-6
Print ISBN
978-3-662-11366-0
DOI
https://doi.org/10.1007/978-3-662-11364-6