9789401070164 - structural design via optimality criteria: the prager approach to structural optimization (mechanics of elastic and inelastic solids, band 8) von rozvany, george i. n. i. n. (8 Ergebnisse)
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Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - 'During the last two decades, research on structural optimization became increasingly concerned with two aspects: the application of general numeri cal methods of optimization to structural design of complex real structures, and the analytical deriva…tion of necessary and sufficient conditions for the optimality of broad classes of comparatively simple and more or less ideal ized structures. Both kinds of research are important: the first for obvious reasons; the second, because it furnishes information that is useful in testing the validity, accuracy and convergence of numerical methods and in assess ing the efficiency of practical designs. ' (Prager and Rozvany, 1977a) The unexpected death of William Prager in March 1980 marked, in a sense, the end of an era in structural mechanics, but his legacy of ideas will re main a source of inspiration for generations of researchers to come. Since his nominal retirement in the early seventies, Professor and Mrs. Prager lived in Savognin, an isolated alpine village and ski resort surrounded by some of Switzerland's highest mountains. It was there that the author's close as sociation with Prager developed through annual pilgrimages from Australia and lengthy discussions which pivoted on Prager's favourite topic of struc tural optimization. These exchanges took place in the picturesque setting of Graubunden, on the terrace of an alpine restaurant overlooking snow-capped peaks, on ski-lifts or mountain walks, or during evening meals in the cosy hotels of Savognin, Parsonz and Riom.
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Zustand: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. I.1 Why Optimality Criteria.- I.2 Classes of Problems in Structural Optimization.- I.3 Case Studies Involving Simple Structures.- I.4 Case Studies Involving More Complex Structures.- I.5 Broader Implications of Optimali…ty Criteria Methods.- 1. Static-Kinem.
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Taschenbuch. Zustand: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -'During the last two decades, research on structural optimization became increasingly concerned with two aspects: the application of general numeri cal methods of optimization to structural design of complex real structures, and the a…nalytical derivation of necessary and sufficient conditions for the optimality of broad classes of comparatively simple and more or less ideal ized structures. Both kinds of research are important: the first for obvious reasons; the second, because it furnishes information that is useful in testing the validity, accuracy and convergence of numerical methods and in assess ing the efficiency of practical designs. ' (Prager and Rozvany, 1977a) The unexpected death of William Prager in March 1980 marked, in a sense, the end of an era in structural mechanics, but his legacy of ideas will re main a source of inspiration for generations of researchers to come. Since his nominal retirement in the early seventies, Professor and Mrs. Prager lived in Savognin, an isolated alpine village and ski resort surrounded by some of Switzerland's highest mountains. It was there that the author's close as sociation with Prager developed through annual pilgrimages from Australia and lengthy discussions which pivoted on Prager's favourite topic of struc tural optimization. These exchanges took place in the picturesque setting of Graubunden, on the terrace of an alpine restaurant overlooking snow-capped peaks, on ski-lifts or mountain walks, or during evening meals in the cosy hotels of Savognin, Parsonz and Riom. 496 pp. Englisch.
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Taschenbuch. Zustand: Neu. This item is printed on demand - Print on Demand Titel. Neuware -I.1 Why Optimality Criteria .- I.2 Classes of Problems in Structural Optimization.- I.3 Case Studies Involving Simple Structures.- I.4 Case Studies Involving More Complex Structures.- I.5 Broader Implications of Optimality Criteria Method…s.- 1. Static-Kinematic Optimality Criteria.- 1.1 Aims.- 1.2 An Introductory Example: What This Book Is All About.- 1.3 Plastic Design on the Basis of the Lower Bound Theorem.- 1.4 Basic Variables in Structural Mechanics.- 1.5 Fundamental Relations of Structural Mechanics.- 1.6 The Role of Static-Kinematic Optimality Criteria.- 1.7 The Prager-Shield Theory of Optimal Plastic Design.- 1.8 The G-Gradient Operator.- 1.9 Extensions of the Prager-Shield Theory in Plastic Design.- 1.10 Optimal Elastic Design - Static Problems.- 1.11 Optimal Elastic Design - Buckling and Natural Frequency Constraints.- 1.12 Superposition Principles.- 1.13 Duality Principles in Elastic Design.- 1.14 Concluding Remarks.- 2. Optimal Plastic Design of Beams with Freely Variable Cross-Sectional Dimensions.- 2.1 General Concepts.- 2.2 Optimal Plastic Design of Beams Having a Moment-Dependent Specific Cost Function - Continuously Variable Cross-Section.- 2.3 Optimal Plastic Design of Beams Having a Moment and Shear Dependent Specific Cost Function - Continuously Variable Cross-Section.- 2.4 Dual Formulation for Plastically Designed Beams - Continuously Varying Cross-Section.- 2.5 Concluding Remarks.- 3. Optimal Plastic Design of Beams with Unspecified Actions or Reactions.- 3.1 Preliminary Remarks.- 3.2 External Actions (Reactions) at Prescribed Locations.- 3.3 External Actions or Reactions of Unspecified Location.- 3.4 Concluding Remarks.- 4. Optimal Plastic Design of Beams with Segmentation.- 4.1 Segmentation in Beam Design.- 4.2 Optimality Conditions forSegmented Beams with Prescribed Segment Boundaries.- 4.3 Optimization of Segmentation.- 4.4 Segmented Beams with Multiple Load Conditions.- 4.5 Concluding Remarks.- 5. Optimal Plastic Design of Beams: Allowance for Selfweight, Bounded Spatial Gradients (Niordson-Constraints) and Linear Segments.- 5.1 Introductory Remarks.- 5.2 Allowance for the Effect of Selfweight - Continuously Variable Cross-Section.- 5.3 Bounded Spatial Gradients of the Specific Cost (Niordson-Constraints).- 5.4 Beams with Segmentation and Selfweight.- 5.5 Beams with Linear Segmentation.- 5.6 Concluding Remarks.- 6. Optimal Elastic Design of Beams - Stress and Deflection Constraints.- 6.1 Optimal Elastic versus Optimal Plastic Design.- 6.2 Linearly Elastic Beams with Stress and Displacement Constraints - Freely Variable Cross-Sectional Dimensions.- 6.3 Prescribed Distribution of the Cross-Sectional Parameters over Given Beam Segments.- 6.4 Concluding Remarks.- 7. Optimal Elastic Design of Beams - Optimization of Segmentation, Constraints on Spatial Gradients (Niordson-Constraints) and Multicriteria Design.- 7.1 Introductory Remarks.- 7.2 Optimization of Beam Segmentation and Location of Hinges and Supports.- 7.3 Optimization of Elastic Beams with Stress, Deflection and Niordson-Constraints.- 7.4 Multicriteria Optimization of Elastic Beams.- 7.5 Concluding Remarks.- 8. The Theory of Optimal Layouts and a Brief Review of Its Applications.- 8.1 Introductory Remarks.- 8.2 The Concept of Structural Universe.- 8.3 Introductory Examples.- 8.4 Classical and Advanced Layout Theories.- 8.5 Applications of the Classical Layout Theory.- 8.6 Applications of the Advanced Layout Theory.- 9. A Short History of Optimality Criteria Methods.- 9.1 The Origins of Optimality Criteria in Structural Mechanics.-9.2 Later Developments.- 9.3 Historical Notes on Optimal Layout Theory.- Closing Remarks.- Appendix. A Brief Review of Variational Methods.- A.1 Aims.- A.2 Necessary Conditions (Euler Equations) for the Minimum of a Functional - Given Boundary Conditions and No Constraints.- Problems and Solutions.- A.3 Variational Problems with Equality Constraints.- Pro.
