TAILIEUCHUNG - Ebook Vibrations (2nd edition): Part 2

(BQ) Part 1 book "Vibrations" has contents: Single-degree-of-freedom systems - subjected to transient excitations, multiple degree-of-freedom systems - governing equations, natural frequencies, and mode shapes, multiple degree of freedom systems - general solution for response and forced oscillations, vibrations of beams. | 6 Single Degree-of-Freedom Systems Subjected to Transient Excitations INTRODUCTION RESPONSE TO IMPULSE EXCITATION RESPONSE TO STEP INPUT RESPONSE TO RAMP INPUT SPECTRAL ENERGY OF THE RESPONSE RESPONSE TO RECTANGULAR PULSE EXCITATION RESPONSE TO HALF-SINE WAVE PULSE IMPACT TESTING SUMMARY EXERCISES INTRODUCTION In Chapter 4, free responses were discussed, and in Chapter 5, responses to harmonic and other periodic excitations were discussed. As illustrated in the last two chapters, a “sudden” change in the state of a system brought about by an initial condition or by a change in the profile of the forcing function results in transients in the response of the system. Here, the initial conditions are assumed to be zero, and the responses to various types of excitations such as impulse excitations, step inputs, ramp inputs, and pulse excitations are considered at length. All of these excitations are characterized by sudden changes 285 CHAPTER 6 Single Degree-of-Freedom Systems Subjected to Transient Excitations 286 in their respective profiles of amplitude with time. When transformed to the frequency domain the responses to such transient excitations can also provide a basis for determining the characteristics of a system. The resulting displacement response, and several design criteria are established based on this information. In the systems considered in this chapter, the inertia element or the base of the system is subjected to a transient forcing. Solution for Response to Transient Excitation When the initial displacement Xo ϭ 0 and the initial velocity Vo ϭ 0, the governing equation for an underdamped system (0 Ͻ z Ͻ 1) with a forcing acting on the mass as shown in Figure is given by Eq. (), which is repeated below. x(t) c f(t) k m t 1 x 1t 2 ϭ mvd Ύe Ϫzvnh sin1vdh2f 1t Ϫ h2dh 0 FIGURE t Spring-mass-damper system subjected to forcing f(t). 1 ϭ mvd Ύe Ϫzvn1tϪh2 sin1vd 3t Ϫ h4 2f

• Cơ khí - Chế tạo máy
• The management of quality
• Multiple degree of freedom systems
• Subjected to transient excitations
• Governing equations
• Vibrations of beams
• Control of quality
• Quality management
• Quality improvement
• Quản lý chất lượng
• Total quality in organizations
• Modern quality management
• Manufacturing systems
• The definition of quality
• Total quality management
• The tools of quality control
• Decision theory
• Acceptance sampling
• Control charts
• Project management
• Lecture Project management in practice
• Project quality management
• Cost of quality
• Quality assurance
• Quality control
• Operations management
• Competitive advantage
• Quality management
• Design quality
• Quality specifications
• Supply chain quality management
• Internal quality management
• Upstream quality management
• Downstream quality management
• Supply chain performance
• Logistics management
• Lecturte Logistics management
• Quản trị logistics
• Lecture Operations management
• Supply chain management
• Quality tools
• Software quality assurance
• Lecture Software Quality Assurance
• Software quality
• Management components of software quality
• Project progress control
• Software quality metrics
• Service quality in leisure and tourism
• Leisure industry
• Delivering quality
• Quality management systems
• Quality management tools
• Human resource management
• Modern importance of quality
• The costs of quality
• Total quality management in education
• The idea of quality
• Two concepts of quality
• The educational product
• Continuous improvement
• Tạp chí khoa học
• joint training
• Giáo dục đại học
• Process management
• Competitive priorities
• Types of processes
• The impact of supply chain quality management on firm performance
• Empirical evidence from Vietnam
• Measure supply chain quality management include
• Quality contributors
• Dimensions of product quality
• Nghiên cứu chính sách và quản lý
• Performance measurement
• Strategic information management