Analysis Of Machine Elements Using SOLIDWORKS Simulation 2017 Book Pdf
Cleopatra Elland
Analysis of Machine Elements Using SOLIDWORKS Simulation 2022 is written primarily for first-time SOLIDWORKS Simulation 2022 users who wish to understand finite element analysis capabilities applicable to stress analysis of mechanical elements. The focus of examples is on problems commonly found in introductory, undergraduate, Design of Machine Elements or similarly named courses.
Analysis of Machine Elements Using SOLIDWORKS Simulation 2017 book pdf
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In order to be compatible with most machine design textbooks, this text begins with problems that can be solved with a basic understanding of mechanics of materials. Problem types quickly migrate to include states of stress found in more specialized situations common to a design of mechanical elements course. Paralleling this progression of problem types, each chapter introduces new software concepts and capabilities.
The description and use of a Matlab programmedsoftware with graphical interface created in GUIDE are presented in this paper.The report begins with the introduction of multibody approach fundamentals forplanar mechanisms. Vector description of rigid elements, revolute and prismatickinematic pairs, and rotatory or linear drivers (actuators) are presented withthe set of the restriction equations. Numerical solution of the equations forboth kinematics and dynamics of the mechanism elements is made with theNewton-Raphson algorithm. Sliding-crank four-link planar mechanism case studyis used for familiarizing the user with the basic level multibody approachsoftware that is introduced in the paper. The use of the software ispainstakingly illustrated for the sliding-crank mechanism at every stage:definition of elements, joints, and actuators, followed by motion specificationand the final visualization of the simulation results. A satisfactoryvalidation is made by comparing the software findings against a SolidWorkssimulation.
As from the educational stand-point, the most of the Mechanical Engineering programs in the world include at least one course that deals with the study and analysis of mechanisms. In Colombia, for instance, the Colombian association of electrical, mechanical and related engineering majors-ACIEM [6] (ACIEM because of its Spanish translation Asociación Colombiana de Ingenieros Eléctricos, Mecánicos y Afines) states that Mechanisms is a core subject for the Mechanical Engineering programs in Colombia. On the other hand, teaching and learning tools for this subject is actively changing in accordance with technological advancements. In the 70s, by-hand graphical approach for position, velocity and acceleration kinematic analysis was used. Later, during the 80s, algebraic methods that are based on vector analysis and complex numbers were introduced. More recently, it has been emphasized the use of computer for the programming of the algebraic solutions, so that the solution might be visualized not only for table or a plot, but for the simulation of a whole work-cycle.
This paper presents a software for the kinematic and dynamic analysis of planar mechanisms. The programming was based on the multibody mechanical systems approach. Multibody fundamentals are presented trying to synthesize knowledge in the computational analysis of mechanisms. An illustrative example for using the software is explained for planar mechanisms with rotational and prismatic joints. From the user standpoint, it is highlighted that the user does not need experience in drawing mechanical elements. The mechanism to be analyzed can be built by making click and defining lengths inside textboxes. The first part of the report is an introduction to the mathematical fundamentals. Later, the relation between the mathematical approach and the programming methods are presented; in order to provide the user with the indications for further modification of the programming code, if required. An explanation of the GUI is next, followed by the study case. Results are compared against findings that were obtained using another computational tool.
In computational analysis for mechanisms based on multibody approach, a coordinate system with respect to an inertial reference frame is used for defining the position of each body. If the reference frame moves with its body, then the frame is called a local reference system. Fig. 1(a) depicts a four-link mechanism with four revolute joints whose movable elements position has been defined by a reference system xi,yi at its center of mass, and a position angle ψi. In contrast, Fig. 1(b) shows the joint angles label type that is used in Robotics and Mechanisms and Machine Theory; by knowing the joint angles and the link distances is also possible to know the behavior of any element of the mechanism at any moment. Due to the greater amount of variables used for describing the system in Figure 1(a), some equations (usually linear) must be established to describe the manner how all these variables are related. The stated equations must propose a system with independent variables as the same degrees-of-freedom (DOF) of the system.
Fig. 4 depictsthe vector analysis labelling for the prismatic joint that allows only relativetranslational motion between consecutive elements i and j. Similar to therotational joint, there are two position vectors, ri and rj,from the origin of the global reference frame xF,yF tothe center of mass of each element. There are also the joint position vectorswith respect to the local reference system of each body, they are vectors and . Parallel local reference systems , and , for bodies i and j, respectively,establish the reference system for the joint. From the labelling in Fig. 4, theprismatic joint is defined as the connection that allows only motion along theline that is perpendicular to axes and and connects points Piand Pj. The equation thatkinematically relates the vectors defined in Fig. 4 is given by equation (8),where di,j is the vectorfrom the origin of local reference system , to the origin of the local referencesystem , . The restriction vector for the linearmotion of the prismatic joint, , is given by equation (9).
Each element of amechanism has to be described for the multibody formulation by using the jointand actuator definitions. For rigidbodies are required the mass, inertia and initial position values. Fig. 7presents a widely used mechanism known as the sliding-crank type, commonlyfound in car engines and sewing machines, among others. The example of thefour-link mechanism used as an example, with the respective information isgiven in Table 4. First information needed is the number of elements. Groundedlink or fixed frame is taken as cero element. Next, the mass and the inertia ofthe rigid body are given, required for the dynamic analysis. The initialposition of each rigid body is given next, by a three element vector thatcontains abscissa of the center of mass, ordinate of the center of mass, andorientation of the element given in radians, for each element. The mechanism inFigure 7 has three rotational joints and one translational joint, whoseinformation is summarized in Table 5. The joints requires the specification ofthe connected elements and the coordinates of the contact point in each bodylocal system, this is the local vector. Only an actuator is needed, setas rotational type. Multibody information for therotational actuator is presented in Table 6. The two bodies that the actuatoris connecting are to be specified. An initial angle of the movable element, θ0, is needed, inaddition to the motion function with its first and second derivatives.
Chen Z X, Yang P, Liu H L, Zhang W, Wu C. Characteristics analysis of granular landslide using shaking table model test. Soil Dynamics and Earthquake Engineering, 2019; 126: 105761. doi: 10.1016/j.soildyn. 2019.105761
Create citation alert 1755-1315/972/1/012078 Abstract The weight of the deck machinery greatly affects the position of the small ship's center of gravity so that it also affects the stability of the ship. Therefore, it is necessary to conduct optimization studies to reduce the weight of ship deck machinery, especially anchor mooring winch, by reducing the weight of ship deck machinery will lower the position of the center of gravity of ship so that can improve ship stability. This paper presents the effects of a topology optimization examination based on the finite element evaluation on anchor mooring winch support bracket using the SolidWorks Simulation module. The main intention to examine is to optimize the general weight of the anchor mooring winch support bracket via way of means of thinning specific regions of the anchor mooring winch support bracket in keeping with the calculated minimum strain energy. The topology optimization algorithm that is used in the current study gives an optimal structural shape of the support bracket of the anchor mooring winch with the largest stiffness, considering the given quantity of mass so that it will be eliminated from the preliminary layout space. The complete sequence of steps for carrying out the topology control optimization study is shown, taking into account the constraints arising from the construction features and the method of manufacturing the support bracket of the anchor mooring winch. The layout became carried out, and the effects have been provided via way of means of evaluating the preliminary version and the optimized version. As the result of topology optimization study, its stress was increased by about 4MPa and mass was reduced by about 15kg in comparison with the initial design.
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