We have worked with many commercial and government customers in diverse fields, including the aerospace, defense, entertainment, and consumer-product industries. From defining the loads and environments to which your structure is exposed, to predicting the dynamic response and modifying the design to meet requirements, ATA can help. ATA has extensive experience in defining the loads applied to a variety of aerospace structures. These include aerodynamic quasi-static, gust, and buffet for both launch vehicles and aircraft, in flight and pad liftoff release, separation, parachute, plume impingement, on-orbit and docking, and reentry and landing loads. Derivation of these load cases involves a combination of advanced analytical tools and the experience that comes from decades of working on a wide variety of aerospace systems. ATA is an industry leader in modal analysis and forced response dynamics.
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Coupled Dynamic Loads Analysis
Fast Coupled Loads Analysis Method | NASA
Statistical variation of parameters governing the forcing functions is accommodated by generating multiple cases of forcing functions for a single flight event. After all cases are analyzed, the maximum transient load is taken as the largest load from any of the cases. The frequency range of transient load analysis is limited by the accuracy of both the model and the forcing functions. For Shuttle liftoff and landing, transient analysis generally accounts only for frequencies from 0 to 35 Hz. For some expendable launch vehicles, significant axial loads are generated at higher frequencies during engine cutoff events, and transient analyses must be run to 60 Hz or higher. For other events such as docking, robotics berthing, plume impingement, and spacecraft landing, the modal content must be selected to adequately capture the dynamic response. Low frequency vibration and transient responses of payloads and spacecraft result in loads and motions that must be determined analytically to evaluate structural integrity and functionality.
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Launch Vehicle Coupled Loads Analysis (CLA) Upper Frequencies
Structural analysis is the determination of the effects of loads on physical structures and their components. Structures subject to this type of analysis include all that must withstand loads, such as buildings, bridges, aircraft and ships. Structural analysis employs the fields of applied mechanics , materials science and applied mathematics to compute a structure's deformations , internal forces , stresses , support reactions, accelerations, and stability. The results of the analysis are used to verify a structure's fitness for use, often precluding physical tests.
Coupled loads analysis CLA is a critical process for many high-technology systems including launch vehicles and satellites. CLA predicts responses caused by major dynamic and quasistatic loading events such as liftoff, gust, buffet, and engine startup and shutdown. CLA helps to minimize risk and maximize the probability of mission success. Quartus Engineering has a wide range of capabilities for rapidly and accurately performing coupled loads analysis.
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