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RISIndirect Optimization of Underactuated Spacecraft Formation Reconfiguration in Elliptic Orbits
Publisher: ASCE
Abstract: This paper proposes analytical solutions to optimal underactuated spacecraft formation reconfiguration in elliptic orbits, without either the radial or in-track thrust. For either underactuated case, the dynamical model ...
Behavior and Analysis of Simply Supported Bridges under Vessel Side Collisions: Implications from Collapse of the Taiyangbu Bridge
Publisher: ASCE
Abstract: On July 7, 2020, the Taiyangbu Bridge crossing the Changjiang River was hit by a barge loaded with sand, resulting in the collapse of the main span. Such side collisions are seldomly investigated in previous studies. To ...
Effects of Corrosion and Scouring on Barge Impact Fragility of Bridge Structures Considering Nonlinear Soil–Pile Interaction
Publisher: ASCE
Abstract: This paper investigates the effects of corrosion and scouring on the barge impact fragility of bridge structures. A typical four-span continuous reinforced concrete (RC) bridge is selected as the baseline structure, and a ...
Characterization and Prediction of Texture in Laser Annealed NiTi Shape Memory Thin Films
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Thin film shape memory alloys are a promising material for use in microscale devices for actuation and sensing due to their strong actuating force, substantial displacements, and large surface ...
Fast Terminal Sliding Mode Control of Underactuated Spacecraft Formation Reconfiguration
Publisher: American Society of Civil Engineers
Abstract: Fast nonsingular terminal sliding mode controllers (FNTSMCs) are proposed for underactuated spacecraft formation reconfiguration without either the radial or the in-track thrust. A nonlinear dynamic model of underactuated ...
Fast Terminal Sliding Mode Control of Underactuated Spacecraft Formation Reconfiguration
Publisher: American Society of Civil Engineers
Abstract: Fast nonsingular terminal sliding mode controllers (FNTSMCs) are proposed for underactuated spacecraft formation reconfiguration without either the radial or the in-track thrust. A nonlinear dynamic model of underactuated ...
Barge Bow Force–Deformation Relationships for Bridge Impact-Resistant Design: Development and Assessment Using Shock Spectrum Approximation
Publisher: ASCE
Abstract: Force–deformation relationships of waterway vessels play an important role in the impact-resistant design of bridge structures. Characterizations of barge bow force–deformation (i.e., crushing) behaviors found in design ...
Temperature Field Characteristics of Flat Steel Box Girders Based on In Situ Field Measurement and Numerical Simulation
Publisher: ASCE
Abstract: Accurate assessment of temperature characteristics of flat steel box girders (FSBGs) is of great significance for the design, construction, and maintenance of long-span bridges. However, the inflow wind speed has been ...
An Algorithm to Derive Temperature and Humidity Profile Changes Using Spatially and Temporally Averaged Spectral Radiance Differences
Publisher: American Meteorological Society
Abstract: A linear inversion algorithm to derive changes of surface skin temperature and atmospheric temperature and specific humidity vertical profiles using spatially and temporally averaged spectral radiance differences is ...