Abstract: A variable gain direct velocity feedback is proposed to control vibrations in structures with two closely spaced natural frequencies using a single actuator. First, limitation of the conventional ...

Abstract: A rule-based control algorithm for active tuned mass dampers (TMDs) is proposed. First, perturbation solutions of the linear quadratic regulator (LQR) feedback gains for the active TMD system are derived. Using these ...

Abstract: A design method of tuned mass dampers (TMDs) for structures with bilinear hysteresis subject to harmonic excitation is proposed. Conventional TMDs fail to control a bilinear structure as the equivalent natural frequency ...

Abstract: Management systems have had long widespread acceptance in many industries for various applications: notably, quality, safety, and environment. In recent years, the North American onshore pipeline ...

Abstract: Recent progress in creepresistant bainitic, martensitic, and austenitic steels for high efficiency coalfired power plants is comprehensively reviewed with emphasis on longterm creep strength and microstructure stability ...

Abstract: Abstract. The reasonable procedures for estimating long-term creep rupture strength are investigated for ASME grade 91 steel using creep rupture data in the National Institute for Materials Science (NIMS) creep data sheet. ...

Abstract: This paper presents a proposed optimum tire force distribution method in order to optimize tire usage and find out how the tires should share longitudinal and lateral forces to achieve a ...

Abstract: Due to impact degassing during accretion, a hot H2O-rich proto-atmosphere was possibly formed on the growing Earth. We investigate the evolution of an impact-generated H2O?CO2 atmosphere at the final stage of accretion by ...

Abstract: . Four well-known constitutive models for viscoplastic deformation of metals, i.e., Johnson–Cook (JC), Zerilli–Armstrong (ZA), Rusinek–Klepaczko (RK), and Voyiadjis–Abed (VA), have been investigated and compared with reference...