1 - 7 of 7 articles
Abstract An investigation is made of the use of long, slit-like windows in the wall of a rectangular, tunnel-entrance hood to suppress the harmful environmental impact of the compression wave produced as a high-speed train enters a long tunnel. Model scale testing and numerical simulation...
Abstract Although the main mechanisms of generating ground vibrations at source, e.g. by rail and road traffic, are now well understood, there are still very few investigations aimed to protect the affected buildings by influencing the propagation of ground vibrations, mainly Rayleigh surface...
Abstract Due to standing waves, the sound pressure level within a room may vary as much as 20–30 dB at low frequencies. Principal properties of low-frequency sound in rooms are illustrated by simulations, and sound pressure distributions as well as the performance of Swedish and Danish...
Abstract This paper describes the effects to sufferers of exposure to low frequency noise in the UK. Low frequency noise is now a recognised problem in many countries in the world and although a relatively small number of people are affected, those who are tend to suffer severe distress. In most...
Abstract In this paper, an optimal control design method based on the use of preview look-ahead information about the road surface input has been shown to offer substantial performance benefits for active and semi-active suspension systems. A twin accumulator semi-active suspension system is...
This paper presents investigations into the design of a command-shaping technique for vibration control of flexible structure systems using genetic algorithms (GAs). Designing a command shaper requires a priori knowledge about the damping ratio and natural frequency of the system, which may not...
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