文化的提炼空间的诠释--诸暨市新客站站前广场方案设计

文章主要介绍了站前广场的方案构思过程,从对现场基址的分析解读和对地域文化的提炼表达,准确的把握住广场的主题立意,并紧扣主题展开布局构思,形成极富个性和地域特征的公共开放空间.     

阜新市集中供热一期管网改造工程技术设计的几点体会

本文针对阜新市集中供热一期管网改造工程,归纳总结了设计中热负荷、计算参数、管网敷设及补偿方式、管道保温和保护层等问题的设计体会,最后得出了该工程的综合经济分析结论。     

宣钢炼铁厂解冻库的建设实践

宣钢炼铁厂以燃烧高炉煤气提供热量,建解冻库解冻火车运送的炼铁原料,保证了冬季高炉原料的及时供应。     

住宅小区变压器容量的选择问题

阐述了现阶段住宅小区计算负荷的确定,介绍了小区变压器容量的选取。     

复杂机械系统动力学建模技术研究与应用

采用面向对象技术对复杂机械系统动力模型元素进行了分析．根据其特点提出了支持动力学仿真建模平台的模型元素类体系结构,并对该平台关键技术——关联关系管理和子系统建模进行了探讨．最后应用上述技术开发出了仿真建模平台InteDyn,并以汽车整车模型和悬架模型为例证明了这些技术的可行性和有效性．     

C4 烯烃叠合反应及催化剂研究现状

简述了国内外C₄ 烯烃叠合反应的研究现状,结合相关技术进展对C₄ 烯烃的化工利用途径进行了归纳。以异丁烯为例,介绍了叠合反应的化学反应机理;着重阐述固体磷酸催化剂、分子筛催化剂的催化性能和研究概况。针对我国低碳烯烃的利用现状,提出了C₄ 烯烃的发展应用前景和建议。     

对会计委派制的基本思考

对会计委派制试点产生的背景及可行性进行了阐述,对推行会计委派制的途径进行了探讨,从加强国有资产管理,加强预算处资金管理角度,分析了会计委派制的优越性及发展前景。     

Vibration response analysis caused by rubbing between rotating blade and casing

Two types of blade-tip rubbing due to the static misalignment of the bladed-disk center and casing center and casing deformation are simulated. By applying aerodynamic load in the blade lateral/flexural direction, vibration responses due to blade-casing rubbing are analyzed under the run-up process with constant angular acceleration and the steady-state process at 10000 rev/min. The effects of some parameters, such as the static misalignment e _c, casing stiffness k _c and casing deformation n _p, on the system vibration responses are also illustrated by spectrum cascades, time-domain waveforms of displacement, normal rubbing forces, amplitude spectra and the impulse P in a single blade-casing rubbing period. The results show that blade-tip rubbing will cause amplitude amplification and harmonic resonance phenomena when the multiple frequencies (nf _r) of rotational frequency (f _r) coincide with the first three flexural dynamic frequencies of the blade (f _n1, f _n2 and f _n3). For example, the displacement amplitudes at 3f _r, 14f _r and 38f _r are large and the vibration is dominant near f _n1. In addition, the casing deformation mainly excites the dominant Blade passing frequency (BPF), which is related to the casing deformation coefficient n _p. By comparing these impulse values, for the selected parameters in this paper, the casing stiffness has a greater effect on impulse than the static misalignment and casing deformation coefficient. The impulse shows a linear increase trend with the increasing static misalignment, and it decreases under the large n _p because the contact time decreases with the increase of n _p.     

非饱和粉质粘土模型支盘桩试验研究

根据挤扩支盘桩的实际工作性状,设计了一个室内模型试验装置来研究支盘桩的承载和变形性能以及影响因素,通过与等直径模型桩的对比试验表明支盘桩的承载力远远高于等直径桩,而沉降变形则要小得多。试验还证实盘底土体的侧阻对桩的承载力贡献很小,在紧邻盘底的位置甚至可能产生负摩擦作用,设计时应给予充分重视。另外,根据土工试验表明,通过盘的挤扩作用使其周围土体产生较明显的挤密作用,这种挤密效应对桩的承载力的提高有积极作用。最后提出了一个支盘桩承载力计算公式。