热滑移型摩擦摆隔震支座力学性能分析与隔震性能研究
发布时间：2018-12-06 15:42
【摘要】：随着火电厂机组的不断增大,烟风道截面尺寸也在逐渐变大,烟风道自重以及积灰等荷载等也会随之增大。在地震作用下,巨大的自重及积灰荷载将会产生较大的惯性力,从而造成烟风道结构体系严重破坏,产生巨大的经济损失。但现阶段对烟风道支座的研究多集中于热滑移方面,对烟风道的隔震设计研究较少。本文在摩擦摆隔震支座和滑移支座的基础之上,提出了一种新型热滑移摩擦摆隔震支座(TS-DCFP),该支座能够满足在一方向上隔震,另一方向上滑移的需求。本文主要针对TS-DCFP进行了理论分析、隔震性能研究、和选型设计研究。分析验证了 TS-DCFP优异的隔震性能,给出了 TS-DCFP的选型设计方法。本文主要研究内容如下:(1)根据双凹面摩擦摆隔震支座(DCFP)和滑移支座,提出了新型热滑移摩擦摆隔震支座(TS-DCFP)的构造形式,并对两个方向分别进行了理论分析,推导了力-位移关系,构造出了两个方向的滞回曲线,计算了 TS-DCFP的最大容许应力和最大位移。(2)运用ABAQUS软件建立了 TS-DCFP实体模型,分别进行了两个方向、不同位移幅值的静力分析,验证了 TS-DCFP两个方向理论推导所得结果的正确性。(3)针对TS-DCFP在ABAQUS中的简化模拟进行了研究,运用Gap和Spring单元组合模拟了 TS-DCFP;建立了 TS-DCFP框架隔震体系模型,分别进行了单、双向地震作用模拟,研究了单、双向地震作用下各地震响应,分析了 TS-DCFP在单、双向地震作用下的的隔震效果;对比研究了单、双向地震作用下TS-DCFP的隔震性能差异。研究表明,单、双向地震作用下TS-DCFP都具有优异的隔震性能,同时,单、双向地震作用下各地震响应相差不大,但双向地震作用下的滞回曲线具有一定的不规则性。(4)通过对不同场地类型地震作用分析,研究了不同场地类型下TS-DCFP的隔震性能,证明了 TS-DCFP在Ⅱ、Ⅲ类较硬场地中隔震性能较好,在Ⅳ类软土场地中隔震性能较差,表明了 TS-DCFP适用于Ⅱ、Ⅲ类土质较硬的场地。(5)建立了 TS-DCFP烟风道隔震体系模拟,并对其双向地震作用下的各地震响应进行了分析研究,发现各地震响应均显著降低,表明了 TS-DCFP优异的隔震效果,验证了 TS-DCFP应用于烟风道体系中的可行性。(6)分析了影响TS-DCFP选型的几个重要参数,确定了 TS-DCFP的选型准则及流程,给出了 TS-DCFP的选型设计流程图。
[Abstract]:With the increasing of the units in thermal power plants, the section size of the flue is also gradually increasing, and the weight of the flue and the load such as ash deposition will also increase. Under the action of earthquake, a large inertia force will be produced due to the huge deadweight and ash accumulation load, which will cause serious damage to the structure system of the flue duct and cause huge economic losses. However, at present, the research on the support of the flue is mostly focused on the thermal slip, and the isolation design of the flue is less studied. Based on the friction pendulum isolation and slip bearings, a new type of thermal sliding friction pendulum isolation support (TS-DCFP) is proposed in this paper, which can meet the needs of isolation in one direction and sliding in the other. This paper mainly focuses on the theoretical analysis, isolation performance, and selection design of TS-DCFP. The excellent isolation performance of TS-DCFP is analyzed and the design method of TS-DCFP type selection is given. The main contents of this paper are as follows: (1) according to the (DCFP) and slip bearings of the double concave friction pendulum isolation bearing, a new type of thermal sliding friction pendulum isolation bearing (TS-DCFP) is proposed, and the two directions are analyzed theoretically. The relationship between force and displacement is derived, the hysteretic curves in two directions are constructed, and the maximum allowable stress and maximum displacement of TS-DCFP are calculated. (2) the TS-DCFP solid model is established by using ABAQUS software, and two directions are carried out respectively. Static analysis of different displacement amplitudes verifies the correctness of the derivation of TS-DCFP 's two-direction theory. (3) the simplified simulation of TS-DCFP in ABAQUS is studied, and TS-DCFP; is simulated by combining Gap and Spring elements. The isolated system model of TS-DCFP frame is established, and the single and bidirectional seismic action simulation is carried out respectively. The seismic response under single and bidirectional earthquake is studied, and the isolation effect of TS-DCFP under the action of single and bidirectional earthquakes is analyzed. The difference of isolation performance of TS-DCFP under the action of single and two-way earthquakes is compared and studied. The results show that TS-DCFP has excellent isolation performance under the action of single and bidirectional earthquakes, and there is little difference in seismic response between single and bidirectional earthquakes. But the hysteresis curve under the action of bidirectional earthquake has some irregularity. (4) by analyzing the seismic action of different site types, the isolation performance of TS-DCFP under different site types is studied. The isolation performance of class 鈪，
本文编号：2366268
[Abstract]:With the increasing of the units in thermal power plants, the section size of the flue is also gradually increasing, and the weight of the flue and the load such as ash deposition will also increase. Under the action of earthquake, a large inertia force will be produced due to the huge deadweight and ash accumulation load, which will cause serious damage to the structure system of the flue duct and cause huge economic losses. However, at present, the research on the support of the flue is mostly focused on the thermal slip, and the isolation design of the flue is less studied. Based on the friction pendulum isolation and slip bearings, a new type of thermal sliding friction pendulum isolation support (TS-DCFP) is proposed in this paper, which can meet the needs of isolation in one direction and sliding in the other. This paper mainly focuses on the theoretical analysis, isolation performance, and selection design of TS-DCFP. The excellent isolation performance of TS-DCFP is analyzed and the design method of TS-DCFP type selection is given. The main contents of this paper are as follows: (1) according to the (DCFP) and slip bearings of the double concave friction pendulum isolation bearing, a new type of thermal sliding friction pendulum isolation bearing (TS-DCFP) is proposed, and the two directions are analyzed theoretically. The relationship between force and displacement is derived, the hysteretic curves in two directions are constructed, and the maximum allowable stress and maximum displacement of TS-DCFP are calculated. (2) the TS-DCFP solid model is established by using ABAQUS software, and two directions are carried out respectively. Static analysis of different displacement amplitudes verifies the correctness of the derivation of TS-DCFP 's two-direction theory. (3) the simplified simulation of TS-DCFP in ABAQUS is studied, and TS-DCFP; is simulated by combining Gap and Spring elements. The isolated system model of TS-DCFP frame is established, and the single and bidirectional seismic action simulation is carried out respectively. The seismic response under single and bidirectional earthquake is studied, and the isolation effect of TS-DCFP under the action of single and bidirectional earthquakes is analyzed. The difference of isolation performance of TS-DCFP under the action of single and two-way earthquakes is compared and studied. The results show that TS-DCFP has excellent isolation performance under the action of single and bidirectional earthquakes, and there is little difference in seismic response between single and bidirectional earthquakes. But the hysteresis curve under the action of bidirectional earthquake has some irregularity. (4) by analyzing the seismic action of different site types, the isolation performance of TS-DCFP under different site types is studied. The isolation performance of class 鈪，
本文编号：2366268
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