標(biāo)題: Titlebook: Dynamics of Rotors and Foundations; Erwin Kr?mer Book 1993 Springer-Verlag Berlin Heidelberg 1993 Foundations.Rotordynamik.Rotors.assembly [打印本頁(yè)] 作者: ALLY 時(shí)間: 2025-3-21 16:11
書(shū)目名稱Dynamics of Rotors and Foundations影響因子(影響力)
書(shū)目名稱Dynamics of Rotors and Foundations影響因子(影響力)學(xué)科排名
書(shū)目名稱Dynamics of Rotors and Foundations網(wǎng)絡(luò)公開(kāi)度
書(shū)目名稱Dynamics of Rotors and Foundations網(wǎng)絡(luò)公開(kāi)度學(xué)科排名
書(shū)目名稱Dynamics of Rotors and Foundations被引頻次
書(shū)目名稱Dynamics of Rotors and Foundations被引頻次學(xué)科排名
書(shū)目名稱Dynamics of Rotors and Foundations年度引用
書(shū)目名稱Dynamics of Rotors and Foundations年度引用學(xué)科排名
書(shū)目名稱Dynamics of Rotors and Foundations讀者反饋
書(shū)目名稱Dynamics of Rotors and Foundations讀者反饋學(xué)科排名
作者: 支架 時(shí)間: 2025-3-21 22:39
Shaft with Non Central Discation could be confined to plane motion of the disc. Now consider the three models shown in Fig. 4.1, with either a noncentral or an outboard disc. Besides the displacement of the disc, its rotation around a radial axis must also be considered. As a result its moment of inertia and gyroscopic effect作者: 磨碎 時(shí)間: 2025-3-22 02:08
The Short and the Long Rotorf motion quoted in Chap. 4, equations (4.8) and (4.47) are valid, however, for arbitrary values of .. and .. that is for shafts having a thick disc or a long stiff rotor body, as shown for example in Fig. 5.1. The vibrational behaviour of such a model will be investigated in the present chapter.作者: Femine 時(shí)間: 2025-3-22 06:22
Oil-Film Bearingsc bearings are also increasingly being used. The bearings influence the rotor vibrations to a greater or less degree by their dynamic properties in comparison to those of the rotor and the remaining components of the assembly. This influence originates essentially from the ratio of the rotor stiffne作者: 相符 時(shí)間: 2025-3-22 10:05
Rotors with Oil-film Bearingsly, an oil-film bearing can broadly be described as a spring-damper element, with the special property that the displacement and the force in general do not occur in the same direction. In comparison with rotors with rigid bearings, a rotor on oil-film bearings thus has different natural frequencies作者: 無(wú)情 時(shí)間: 2025-3-22 13:18 作者: 無(wú)情 時(shí)間: 2025-3-22 18:02 作者: invade 時(shí)間: 2025-3-23 00:38 作者: 混沌 時(shí)間: 2025-3-23 03:02 作者: 斗志 時(shí)間: 2025-3-23 08:35 作者: 秘傳 時(shí)間: 2025-3-23 10:18
Influence Coefficients force and moment appears as the product of an influence coefficient and a displacement, either translational or angular (rotational). In this way we can find all the terms on the left-hand side of the equations of motion. This means that the determination of the influence coefficients is very impor作者: 人工制品 時(shí)間: 2025-3-23 14:56 作者: 好色 時(shí)間: 2025-3-23 20:27
Resultsilst one can to some extent discuss the general behaviour of the simple model, it is not possible for the complex model. Thus, we shall consider a few examples and report results from further calculations. The essential vibration behaviour of the rotors of turbo machines will thus be characterized.作者: 不容置疑 時(shí)間: 2025-3-24 00:25
Wien, der urbane Brennpunkt Mitteleuropas,Rotors of machines have, while in operation, a great deal of rotational energy, and a small amount of vibrational energy. The purpose of rotordynamics as a subject is to ascertain how this latter can be kept as small as possible. Its significance can be underlined by the following example.作者: TAP 時(shí)間: 2025-3-24 04:17 作者: 血統(tǒng) 時(shí)間: 2025-3-24 08:20
https://doi.org/10.1007/3-540-27908-3In Chap. 7 the vibration behaviour of a horizontally supported rotor with oilfilm bearings was described. This horizontal support gives rise to journal eccentricity due to rotor weight except for the case of further forces producing a zero resultant.作者: 項(xiàng)目 時(shí)間: 2025-3-24 13:52
https://doi.org/10.1007/3-540-27908-3Figures 14.1 to 14.3 show typical examples of rotor systems whose characteristics will be investigated in this part. These systems consist of rotor, bearings and bearing pedestals and models will be devised which will enable the bending vibrations of real rotors to be obtained sufficiently accurately, using reasonable computing time.作者: Occupation 時(shí)間: 2025-3-24 17:29 作者: Employee 時(shí)間: 2025-3-24 19:31
The one Degree of Freedom SystemThe simplest rotordynamic model is the . discussed in Chap. 3. Its behaviour allows it to be considered essentially as having one degree of freedom. The properties of a one degree of freedom model will therefore be considered first.作者: 食物 時(shí)間: 2025-3-25 02:32 作者: integrated 時(shí)間: 2025-3-25 04:14
Computer ModelFigures 14.1 to 14.3 show typical examples of rotor systems whose characteristics will be investigated in this part. These systems consist of rotor, bearings and bearing pedestals and models will be devised which will enable the bending vibrations of real rotors to be obtained sufficiently accurately, using reasonable computing time.作者: 平息 時(shí)間: 2025-3-25 09:21 作者: ALIBI 時(shí)間: 2025-3-25 13:40
The Short and the Long Rotorf motion quoted in Chap. 4, equations (4.8) and (4.47) are valid, however, for arbitrary values of .. and .. that is for shafts having a thick disc or a long stiff rotor body, as shown for example in Fig. 5.1. The vibrational behaviour of such a model will be investigated in the present chapter.作者: Jacket 時(shí)間: 2025-3-25 18:14 作者: vertebrate 時(shí)間: 2025-3-25 20:10 作者: 模仿 時(shí)間: 2025-3-26 02:43
Internal Dampingt shrink fits or couplings. The first was reported by . and . 1925 [14, 15, 16]. The mechanism is very complex but can be understood by the assumption of a viscous law. This will be considered in the next section.作者: mucous-membrane 時(shí)間: 2025-3-26 07:59 作者: engender 時(shí)間: 2025-3-26 09:08
Resultsilst one can to some extent discuss the general behaviour of the simple model, it is not possible for the complex model. Thus, we shall consider a few examples and report results from further calculations. The essential vibration behaviour of the rotors of turbo machines will thus be characterized.作者: Outmoded 時(shí)間: 2025-3-26 15:22
http://image.papertrans.cn/e/image/284169.jpg作者: watertight, 時(shí)間: 2025-3-26 18:37 作者: 扔掉掐死你 時(shí)間: 2025-3-26 23:42 作者: 心胸開(kāi)闊 時(shí)間: 2025-3-27 02:20
https://doi.org/10.1007/3-540-27908-3in the simplest models possible to clarify their understanding. Later more complicated models will be considered which represent adequately real rotors and their bearings. The reader will then become conversant with more or all of the known phenomena.作者: 衰老 時(shí)間: 2025-3-27 07:34 作者: gusher 時(shí)間: 2025-3-27 09:28
https://doi.org/10.1007/3-540-27908-3f motion quoted in Chap. 4, equations (4.8) and (4.47) are valid, however, for arbitrary values of .. and .. that is for shafts having a thick disc or a long stiff rotor body, as shown for example in Fig. 5.1. The vibrational behaviour of such a model will be investigated in the present chapter.作者: 發(fā)起 時(shí)間: 2025-3-27 16:33
https://doi.org/10.1007/3-540-27908-3c bearings are also increasingly being used. The bearings influence the rotor vibrations to a greater or less degree by their dynamic properties in comparison to those of the rotor and the remaining components of the assembly. This influence originates essentially from the ratio of the rotor stiffne作者: 格子架 時(shí)間: 2025-3-27 20:53 作者: prodrome 時(shí)間: 2025-3-27 21:58
https://doi.org/10.1007/3-540-27908-3ic forms are shown in Fig. 9.1. The rolling elements can be balls, rollers, tapered rollers, spherical rollers or needles (Fig. 9.2). These rolling bodies are positioned within a cage, which holds them at a set spacing. Futher forms of construction for ball-bearings are shown in Fig. 9.3.作者: Odyssey 時(shí)間: 2025-3-28 03:11 作者: Rebate 時(shí)間: 2025-3-28 09:22
https://doi.org/10.1007/3-540-27908-3understood why the instability commenced at a certain level of power. Bearing instability, that is classical bearing instability, could not be responsible, as this commences at a certain rotor speed. In reference [13], it was suggested that a plausible cause might be so-called steam whirl. This aris作者: 排斥 時(shí)間: 2025-3-28 10:33
https://doi.org/10.1007/3-540-27908-3t shrink fits or couplings. The first was reported by . and . 1925 [14, 15, 16]. The mechanism is very complex but can be understood by the assumption of a viscous law. This will be considered in the next section.作者: FLIT 時(shí)間: 2025-3-28 14:42 作者: 煩憂 時(shí)間: 2025-3-28 20:58
https://doi.org/10.1007/3-540-27908-3 force and moment appears as the product of an influence coefficient and a displacement, either translational or angular (rotational). In this way we can find all the terms on the left-hand side of the equations of motion. This means that the determination of the influence coefficients is very impor作者: META 時(shí)間: 2025-3-29 02:54
https://doi.org/10.1007/3-540-27908-3elations will be assumed linear. With the aid of the transfer-matrix method of . [6] and . [7] the models considered here can be solved with reasonable efficiency. This method has retained its usefulness up to the present time and has been extended to rotor-foundation systems (., . [111, 112]). Deta作者: 讓步 時(shí)間: 2025-3-29 03:32 作者: FIG 時(shí)間: 2025-3-29 10:28 作者: Outshine 時(shí)間: 2025-3-29 14:19 作者: Triglyceride 時(shí)間: 2025-3-29 18:25 作者: 外面 時(shí)間: 2025-3-29 22:20
https://doi.org/10.1007/3-540-27908-3r from one stage to another. Fig. 10.1 shows an example of a boiler feed pump. Such a pump is used to pump water at a pressure of between 250 and 450 bar, with an intake pressure of only a few bar. In this example the seals are to be found作者: Gastric 時(shí)間: 2025-3-30 03:30 作者: Axon895 時(shí)間: 2025-3-30 05:01
https://doi.org/10.1007/3-540-27908-3e resulting deflection in the direction of the force. If this stiffness is independent of the direction of the force in the plane in question, then the shaft is regarded as circular, otherwise it is non-circular.作者: burnish 時(shí)間: 2025-3-30 10:27
https://doi.org/10.1007/3-540-27908-3ilst one can to some extent discuss the general behaviour of the simple model, it is not possible for the complex model. Thus, we shall consider a few examples and report results from further calculations. The essential vibration behaviour of the rotors of turbo machines will thus be characterized.作者: forecast 時(shí)間: 2025-3-30 12:26
Shaft with Non Central Discsides the displacement of the disc, its rotation around a radial axis must also be considered. As a result its moment of inertia and gyroscopic effect are called into play. The theory of such a model has been given in many publications, for example [27],..., [31].作者: NAVEN 時(shí)間: 2025-3-30 17:43 作者: 開(kāi)頭 時(shí)間: 2025-3-30 22:49 作者: Little 時(shí)間: 2025-3-31 03:12
o important are thedynamics of the foundation and its interaction with thedynamics of the rotor.This book is divided into four parts.Following apresentation of the basic theory the dynamics ofrotorssupported on several bearings. The third part describesthedynamics of foundations of turbine line-outs作者: 發(fā)出眩目光芒 時(shí)間: 2025-3-31 05:35 作者: 感情 時(shí)間: 2025-3-31 13:02 作者: 財(cái)產(chǎn) 時(shí)間: 2025-3-31 15:50
https://doi.org/10.1007/3-540-27908-3can find all the terms on the left-hand side of the equations of motion. This means that the determination of the influence coefficients is very important. This will be explained in the following by a simple example and then a general case will be taken.作者: ovation 時(shí)間: 2025-3-31 19:08
https://doi.org/10.1007/3-540-27908-3 to control these [114]. Such experience, however, has not been acquired for extensive models, such as, for example, the rotor-foundation model discussed in Part III. As an alternative the finite element method has proved to be very useful and will be applied in the following.
