I can either utilize the underconstrained bodies tool and then apply a fixture, or I can utilize the soft spring.
There are two routes I can take to overcome this. The forces are shown in pink and are applied in the global Y and Z directions respectively.Īfter finishing the setup of this model, I run the model but the “lack of adequate fixtures” warning appears that I mentioned earlier. In the image below, the fixture is shown in green and is restraining the model in the global X direction. In this example, I will use a pretty common model, a flat plate with a fixture assigned in one direction and two forces applied in differing directions. In this blog, I demonstrate a tool called Soft Springs which is another tool to overcome inadequate fixtures in SOLIDWORKS Simulation.
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In an earlier blog called “ How to Deal with Fixture Warnings in SOLIDWORKS Simulation ”, I pointed out the tool the Underconstrained bodies utility, and the utility allows the user to identify where they need to restrain the model. Simply put, the model does not have enough restraints to solve the equations of motion. This is known as being statically indeterminate, and the problem will not have a unique solution. If you have a model with little or no fixtures, you will be unable to solve the equilibrium equations. If you remember from statics, the basis of solving any static problem is through solving Newton’s laws of motion for equilibrium. In this case, the error is pointing to a lack of fixtures in our model (the model still fails if the solver is changed to a sparse solver.) The error pictured below is a common error in SOLIDWORKS Simulation and it often pops up over two different scenarios: The iterative solver has failed or you do not have adequate fixtures. In this SOLIDWORKS Simulation tutorial, I’m going to show you a great new technique to overcome this pesky error and help you get the simulation results you need in order to meet your deadlines!īefore I jump into the SOLIDWORKS Simulation technique, it’s important to talk a bit about theory. Imagine it’s 4:48 PM on a Friday and you’re running a static simulation in SOLIDWORKS Simulation when this message pops up, “Model may not have adequate fixtures.” As you slam your fist against your desk, you wonder if you’re going to be able to get this analysis finished in time.
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