Although rare, fire-related accidents do occur in wastewater treatment and collection facilities. Chlorine, ammonia, methane and hydrogen sulfide can quickly build up in confined spaces. Volatile conditions in hazardous locations can lead to catastrophe. The National Fire Prevention Association (NFPA) 820 standard dictates how to address fire and explosion hazards in wastewater facilities. It offers safeguards against the ignition of combustible gases, health concerns and accumulation of airborne contaminants. It applies to new construction, and additions or modifications to existing faciliti ..read more

(This article was written by TechEmergence Research and originally appeared on: https://www.techemergence.com/industrial-ai-applications-time-series-sensor-data-improve-processes/) Over the past decade the industrial sector has seen major advancements in automation and robotics applications. Automation in both continuous process and discrete manufacturing, as well as the use of robots for repetitive tasks are both relatively standard in most large manufacturing operations (this is especially true in industries like automotive and electronics). One useful byproduct of this increased adoption ha ..read more

Crypto farms are big news these days. Some question the value that can be gained from cryptocurrencies such as Bitcoin and Ethereum. A few go as far as to say it is a whole lot of hot air. In one sense they are correct. Crypto farmers cram massive amounts of computing density into tiny spaces. These banks of servers generate hot air in large quantities the successful ones transform it into a lucrative revenue source. What determines success? How well a space is laid out to pack as much computing muscle into one place while facilitating the inflow of cold air and the removal of hot air. Unfort ..read more

Quick Overview It is often required to create lightweight, simplified versions of large FEMs in order to reduce solution time or post-processing effort. A common simplification technique that can be used with relatively slender parts is midsurfacing. Whereas plate theory can accurately predict the stiffness of each part, there can be uncertainty at the structural connections  be they welded, bonded or fastened- due to the idealization of the part thickness and the creation of non-manifold joints. Simcenter FE Model Correlation and FE Model Update allow you to compare the modal properties ..read more

Quick Overview A powerful way of reducing design conservatism is to validate the finite element model used to simulate its performance. Comparing the simulation model’s natural frequencies and mode shapes with those acquired in test generates confidence in the model’s ability to represent the as-built structure. This in turn allows analysts to reduce the safety factors used to compute structural margins of safety. Simcenter 3D FE Model Correlation supports both test and simulation engineers who wish to perform such a comparison, efficiently providing both visual and quantitative feedback.&nbs ..read more

Quick Overview Simcenter offers a dedicated application to map steady state or transient flow results onto a target model, typically an independent structural model from the same geometry but with a different mesh. For example, one could be interested in the stress and distortion analysis of a canopy due to wind forces. The target FEM must use the same global coordinate system as the source FEM, and both models should be geometrically congruent. However, they need not share the same mesh. Results are mapped from the selected solution on the source model, to a solution on the target model, base ..read more

Quick Overview Cohesive elements are special-purpose 3D elements used to model adhesive joint failure as well as delamination of composite plies. You can create cohesive elements between pairs of geometric surfaces and between specific plies, in both the Simcenter Multiphysics and Samcef environments of Simcenter 11 Pre/Post. In what follows, we focus on the Simcenter Multiphysics environment and describe how to create cohesive elements between plies in a global layup, in order to simulate delamination using a 3D laminate composite model. Introduction to cohesive elements in Simcenter Multiphy ..read more

Quick Overview Sandwich panels are prevalent in many structural applications. The panel facesheets react the membrane and bending loads, whereas the core reacts the bulk of the transverse shear loads. Therefore, you may use the solid mesh to get better results in the ply out-of-plane direction to evaluate delamination and also investigate the local sandwich behavior near the tapered core. This tips and tricks shows how to use Simcenter Laminate Composites to create a 3D mesh of a tapered laminated composite sandwich car hood. Figure 1: Car hood CAD model. Top face (left). Bottoms face (Right ..read more

Quick Overview The laminate dynamic simulation random event reads the results from an NX Nastran SOL 103 real eigenvalues solution and uses an efficient modal approach and advanced integration algorithms to efficiently produce accurate peak responses that correspond to the specified confidence level. This tips and tricks shows how to use Simcenter Laminate Dynamics to quickly evaluate the behavior of a satellite antenna assembly subjected to the base-driven random excitation function shown in Figure 1. The input power spectral density has an irregular shape because it has been notched using a ..read more

Quick Overview Although it is well known that Simcenter supports linear buckling solutions (SOL 105), some engineers are reluctant to use this method for composite laminate, based on the perception that the linear buckling analysis does not adequately account for the low transverse shear stiffness of the laminate and is thus not-conservative. This paper demonstrates that Simcenter linear buckling analyses are, in fact, adequate for composite laminates, even for sandwich structures. Background Buckling of plates inherently involves large transverse deflections and out-of-plane bending, for whic ..read more