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多体动力学仿真软件优化推土机性能 |
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Multi-body simulation optimizes performance of earth moving machinery
Introduction
Dynamic simulation of wheel loaders, backhoes, excavators, dozers, and other earth moving systems is used to support the engineering development process early in new product design programs and make better use of testing downstream.
Simulation is used to predict the complex non linear dynamic behavior, loads, and motion. Manufacturing companies have used increasingly more complete analyses to verify that the design can tolerate the loads and offer reliable customer performance and safety in all scenarios. The simulations are both accurate and versatile and closely match what was once only possible with physical testing.
Simulating the system
The simulation model is created from solid model geometry for mass and inertia properties of each body in the model. Each body is connected by kinematic joints and nonlinear stiffness and damping force elements. Kinematic joints are used to connect the bodies and define the way the bodies move relative to one another. There are different levels of detail used for each aspect of the model depending on what results are required. In the simplest cases, time varying functions are used to defined the length of each actuator resulting in a kinematic description of the steer, lift, and dump degrees of freedom. At the other extreme is a detailed model of the hydraulic pump, lines, valves, and actuators. The hydraulic system can be modeled using the new LMS Imagine.Lab AMEsim product. There is a convenient way to connect the two simulation models and make take advantage of the power of both working together. |
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