Stability of structures

In low-cost permanent magnet synchronous motor (PMSM) drive systems, the rotor position is usually estimated based on the back-electromotive force. However, such estimation methods have the common drawback of having large errors in low-speed regions. In order to solve that drawback in the startup phase, the I-f startup method is studied as its compatibility with the FOC control structure. The purpose of such a method is to make the motor accelerate and overcome the low-speed threshold.

8p vialicene 02-07-2024 1 0   Download

The present study conducted a numerical comparison of these two types of tunnels. The results indicated that the presence of an interior column help to increase the stability of the lining structure. The internal forces within the quasi-rectangular tunnel with an interior column are smaller than those of the sub-rectangular tunnel and quasi-rectangular tunnel without an interior column.

8p viwalton 02-07-2024 2 1   Download

Part 1 of ebook "The building regulations: Explained and illustrated (14th edition)" provides readers with contents including: building control, an overview; the building regulations and approved documents; local authority control; private certification; work under the supervision of a competent person; structural stability (Part A); fire (Part B); materials, workmanship, site preparation and moisture exclusion (Part C); toxic substances (Part D);...

444p mothoiphong 28-06-2024 3 1   Download

Part 1 of ebook "Dynamic stability of suddenly loaded structures" provides readers with contents including: concepts and criteria; introduction and fundamental concepts; simple mechanical models; dynamic stability under constant load of finite duration; the influence of static preloading;...

98p mothoiphong 28-06-2024 1 1   Download

Part 2 of ebook "Dynamic stability of suddenly loaded structures" provides readers with contents including: structural applications; the concept of dynamic stability; two-bar simple frames; the shallow arch; the shallow spherical cap; thin cylindrical shells; other structural system;...

196p mothoiphong 28-06-2024 1 1   Download

Part 1 of ebook "Guide to stability design criteria for metal structures (Fifth edition)" provides readers with contents including: Chapter One - Introduction; Chapter Two - Stability theory; Chapter Three - Centrally loaded columns; Chapter Four - Plates; Chapter Five - Beams; Chapter Six - Plate girders; Chapter Seven - Box girders; Chapter Eight - Beam-columns; Chapter Nine - Horizontally curved steel I-girders; Chapter Ten - Composite columns and structural systems;...

221p mothoiphong 28-06-2024 1 1   Download

Part 2 of ebook "Guide to stability design criteria for metal structures (Fifth edition)" provides readers with contents including: Chapter Eleven - Stability of angle members; Chapter Twelve - Bracing; Chapter Thirteen - Thin-walled metal construction; Chapter Fourteen - Circular tubes and shells; Chapter Fifteen - Members with elastic lateral restraints; Chapter Sixteen - Frame stability; Chapter Seventeen - Arches;...

247p mothoiphong 28-06-2024 1 1   Download

Part 1 of ebook "IUTAM symposium on mesoscopic dynamics of fracture process and materials strength" provides readers with contents including: massively-parallel dislocation dynamics simulations; nondestructive observation of dislocation structures formed at fatigued copper and stainless steel crystals; a discrete dislocation dynamics investigation of formation and stability of lomer locks; on the use of periodic boundary conditions in dislocation dynamics simulations;...

248p mothoiphong 28-06-2024 1 1   Download

Part 1 of ebook "Nonlinear analysis of thin-walled structures: Statics, dynamics, and stability" provides readers with contents including: Chapter 1 - Mechanics of solids; Chapter 2 - Thin plates and shells; Chapter 3 - Nonlinear static analysis;...

253p mothoiphong 28-06-2024 1 1   Download

Part 2 of ebook "Nonlinear analysis of thin-walled structures: Statics, dynamics, and stability" provides readers with contents including: Chapter 4 - Vibrations of structures; Chapter 5 - Nonlinear dynamics; Chapter 6 - Stability of structures; Chapter 7 - Dynamic stability;...

272p mothoiphong 28-06-2024 1 1   Download

Part 1 of ebook "Stability analysis and design of structures" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Basic principles; Chapter 3 - Rigid-body assemblages; Chapter 4 - Buckling of axially loaded members (columns); Chapter 5 - Stability analysis of beam-columns;...

221p mothoiphong 28-06-2024 2 1   Download

Part 2 of ebook "Stability analysis and design of structures" provides readers with contents including: Chapter 6 - Stability analysis of frames; Chapter 7 - Buckling of members having open sections; Chapter 8 - Elastic buckling of thin flat plates; Chapter 9 - Stability analysis of arches, rings and shells; Chapter 10 - Inelastic buckling of structures; Chapter 11 - Structural design for stability of members;...

320p mothoiphong 28-06-2024 3 1   Download

Part 1 of ebook "Stability of structures: Principles and applications" provides readers with contents including: Chapter 1 - Buckling of columns; Chapter 2 - Special topics in elastic stability of columns; Chapter 3 - Beam-columns; Chapter 4 Continuous beams and rigid frames;...

250p mothoiphong 28-06-2024 1 1   Download

Part 2 of ebook "Stability of structures: Principles and applications" provides readers with contents including: Chapter 5 - Torsion in structures; Chapter 6 - Torsional and flexural-torsional buckling; Chapter 7 - Lateral-torsional buckling; Chapter 8 - Buckling of plate elements; Chapter 9 - Buckling of thin cylindrical shell elements; Chapter 10 - Buckling of general shell elements;...

279p mothoiphong 28-06-2024 1 1   Download

Part 1 of ebook "Steel framed structures: Stability and strength" provides readers with contents including: Chapter 1 - Frame instability and the plastic design of rigid frames; Chapter 2 - Matrix methods of analysis of multi-storeyed sway frames; Chapter 3 - Design of multi-storey steel frames to sway deflection limitations; Chapter 4 - Interbraced columns and beams; Chapter 5 - Elastic stability of rigidly and semi-rigidly connected unbraced frames;...

156p mothoiphong 28-06-2024 2 1   Download

Part 2 of ebook "Steel framed structures: Stability and strength" provides readers with contents including: Chapter 6 - Beam-to-column moment-resisting connections; Chapter 7 - Flexibly connected steel frames; Chapter 8 - Portal frames composed of cold-formed channel- and z-sections; Chapter 9 - Braced steel arches;...

185p mothoiphong 28-06-2024 4 1   Download

Part 1 of ebook "Steel-concrete composite structures: Stability and strength" provides readers with contents including: Chapter 1 - Composite structures, a preview; Chapter 2 - Steel-concrete composite flooring deck structures; Chapter 3 - Behavior and design of composite beams with web openings; Chapter 4 - Composite girders with deformable connection between steel and concrete; Chapter 5 - Steel frames with concrete infills;...

177p mothoiphong 28-06-2024 1 1   Download

Part 2 of ebook "Steel-concrete composite structures: Stability and strength" provides readers with contents including: Chapter 6 - Steel-concrete composite columns (I); Chapter 7 - Steel-concrete composite columns (II); Chapter 8 - Design of composite bridges (consisting of reinforced concrete decking on steel girders); Chapter 9 - Composite box girder bridges; Chapter 10 - Ferrocement structures and structural elements;...

184p mothoiphong 28-06-2024 4 1   Download

Part 2 of ebook "A variational approach to structural analysis" provides readers with contents including: Chapter 4 - Complementary virtual work; Chapter 5 - Some energy methods; Chapter 6 - Some static and dynamic stability concepts;...

210p mothoiphong 28-06-2024 2 1   Download

In this work, we have shown that the addition of Zn to nanocrystalline nickel ferrite enhanced its H2 sensing properties, such as sensitivity, response time, and stability. This is explained due to the formation of defects and oxygen vacancies in the crystal structure due to the substitution of Zn ions in place of Ni ions. These defects generated more active sites for H2 gas to interact with, resulting in improved sensing performance.

9p viambani 18-06-2024 1 1   Download