Corrugation pitch
WebSep 8, 2012 · The initiation and evolution of short-pitch corrugation in Beijing metro line 4 was studied from the viewpoint of wheelset vibration. A three-dimensional elastic model was set up. Numerical simulations were undertaken with this model to analyze the corrugation by the wheelset vertical vibration and torsional vibration. Based on numerical results, the … WebAug 1, 1990 · Corrugation-pitch-modulated MQW-DFB laser with narrow spectral linewidth (170 kHz) A spectral linewidth of 170 kHz was achieved at a 1.5- mu m wavelength in a …
Corrugation pitch
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WebA distributed feedback (DFB) laser for high-speed modulation with asymmetric corrugation-pitch-modulated (ACPM) grating structure and high-reflection and anti-reflection coating (HR-AR) coating is demonstrated theoretically and experimentally in this paper. The ACPM gating structure is fabricated by the reconstruction equivalent chirp … WebContext in source publication. Context 1. ... this study, the depth of corrugation considered between 0.01 to 0.1 mm. Figure 8. shows the short (0.05 m wavelength) and long pitch (0.3 m wavelength ...
WebMar 31, 2024 · The corrugated plates are the main components of the simulation. The chevron angle, corrugation depth and corrugation pitch varied for the two types of plates used. The modular design of the heat exchanger allowed us to arrange the plates in the required configurations. The plate geometry used in the simulation is shown in Figure 1. WebOct 30, 2009 · Optimisation of a corrugation-pitch-modulated DFB laser structure with inhomogeneous coupling coefficient for stable single longitudinal mode operation - …
WebCorrugation Design. Annular hose is formed from tubing into individual parallel corrugations. Helical hose is also formed from tubing but into a continuous spiral corrugation. ... Open Pitch hose is intended to be … WebAug 17, 1998 · A corrugation‐pitch‐modulated (CPM) structure was proposed to improve the stability of longitudinal single‐mode operation in distributed feedback lasers. CPM‐DFB lasers have a unique corrugation structure to suppress the spatial hole‐burning effect. This structure was obtained by a newly developed corrugation fabrication method, a ...
WebFeb 1, 2024 · Short pitch corrugation (hereinafter corrugation) is recognized as the periodic undulation of rail running surfaces on the tangent track with a wavelength range of 20–80 mm [1]. Fig. 1 a shows a typical example of corrugation in the Dutch railway. Rail corrugation excites large wheel-rail impact forces, causes excessive vibration and …
WebMay 20, 2024 · In this work, a three-dimensional study of shell and helically corrugated coiled tube heat exchanger with considering exergy loss is investigated. Various design parameters and operating conditions such as corrugation depth (e), corrugation pitch (p) or the number of rounds, inlet fluid flow rate on the coil and shell sides are numerically … it\u0027s one to oneWebDec 16, 2024 · Short pitch corrugation, also known as ‘roaring rail’ due to the noise radiation it produces [ 23, 24 ], has the following characteristics [ 1 ]: 1) its wavelength falls in the range of 20–80 mm, and its amplitude can be up to 100 µm; 2) it predominantly … it\u0027s on fleek 歌詞WebA corrugation-pitch-modulated phase-shifted distributed feedback (DFB) laser is proposed to reduce the spatial-hole-burning effect along the laser cavity. The structure of the proposed corrugation-pitch-modulated phase-shifted DFB laser is illustrated. A reduction in this effect is confirmed from its spectral behavior as a function of driving current. … it\u0027s one\u0027s turn to do sthWebMay 8, 2008 · Short-pitch corrugation (30–80 mm in wavelength) in railways, despite being well known since the early days of the railways because of its criticality in producing damage, ‘roaring rail’ or ‘howling wheel’ noise, and indirectly rolling contact fatigue, is considered an enigmatic phenomenon. net corks on ebayWebThe structure of the proposed corrugation-pitch-modulated phase-shifted DFB laser is illustrated. A reduction in this effect is confirmed from its spectral behavior as a function … net core y angularWebDemonstration of Corrugation Pitch Modulated (CPM) DFB Lasers Based on Surface Grating and Oxide Aperture. Pengfei Zhang, Can Liu, Minwen Xiang, Xiang Ma, … netc organization chartWebOct 30, 2009 · This paper shows that a suitable design of a corrugation-pitch-modulated (CPM) distributed-coupling-coefficient (DCC) distributed feedback (DFB) laser structure can strongly improve the mode selectivity $(\mathfrak{G})$ and the flatness $(\mathfrak{F})$ of DFB laser structures in order to ensure the required criteria for single longitudinal mode … it\u0027s on fox