Shock Center honor.Dr. Ivan Sandler, a Principal at Weidlinger Associates, an international consulting engineering firm, was recently awarded the sixth annual Mel Baron Medal at the The Shock & Vibration Information Analysis Center annual meeting on October 28. Mel Baron was a renowned engineer who was one of the founders of Weidlinger Associates and began the applied science division at the company in the early 1960's. Dr. Sandler is the first Weidlinger engineer to win the prestigious Mel Baron Medal, which SAVIAC SAVIAC Shock and Vibration Information Analysis Center awards annually to a person who has made outstanding contributions to the field of computational structural dynamics Structural dynamics is a subset of structural analysis which covers the behaviour of structures subjected to dynamic loading. Dynamic loads include people, wind, waves, traffic, earthquakes, and blasts. Any structure can be subject to dynamic loading. or constitutive constitutive /con·sti·tu·tive/ (kon-stich´u-tiv) produced constantly or in fixed amounts, regardless of environmental conditions or demand. modeling. Winners have advanced the understanding of shock effects on structures and demonstrated personal leadership in the field. "Ivan is one of the few individuals who have made contributions of the greatest importance to both ground shock and underwater shock fields. Our firm is honored by this recognition from SAVIAC," said Jeremy Isenberg, President of Weidlinger Associates. "Previous winners of the Mel Baron Medal set the bar high, but Ivan's unique and fundamental contributions make him an excellent choice to join this illustrious group. Mel would indeed have approved." Dr. Sandler will be presented with the medal and a commemorative plaque A commemorative plaque, or simply plaque, is a plate of metal, ceramic, stone, wood, or other material, typically attached to a wall, stone, or other vertical surface, and bearing text in memory of an important figure or event. by Doug Bruder, Division Chief for Systems Applications in the technological development directorate with the Defense Threat Reduction Agency The Defense Threat Reduction Agency (or DTRA) is a combat support agency of the United States Department of Defense (DoD) whose primary function is to analyze potential threats to the United States, both homeland and abroad, and provide contingency plans for all such . Nominees for the Mel Baron Medal are chosen by a committee made up of its previous winners: Gene Sevin, Ted Belytschko Ted Belytschko is a researcher in field of computational solid mechanics and is known for development of methods like element-free Galerkin methods and extended finite element methods. , Walt Pilkey, Tom Geers and George O'Hara. Dr. Sandler joined the applied science division at Weidlinger Associates in 1969 after he completed his doctorate at Columbia University Columbia University, mainly in New York City; founded 1754 as King's College by grant of King George II; first college in New York City, fifth oldest in the United States; one of the eight Ivy League institutions. , and worked with Mel Baron on a number of important projects. Dr. Sandler's achievements include the following: A doctoral thesis under Hans Bleich at Columbia University presented the first analytic solution to the problem of a shock wave impinging on a floating structure, which serves as a necessary first benchmark for software developers to test the accuracy of their implementation of the fluid-structure interaction Fluid-structure interaction (FSI) occurs when a fluid interacts with a solid structure, exerting pressure on it which may cause deformation in the structure and thus alter the flow of the fluid itself. of shock waves with floating structures. Working with Frank DiMaggio of Columbia University, Dr. Sandier developed a general nonlinear material model for soils and rock. With the flexibility to fit a wide range of test data for soils and rock, the CAP model is founded on the theoretical framework of classical plasticity and is numerically robust in its software implementation--a seminal development that made modern ground shock analysis possible. Moreover, the CAP model and its variants are found in every major commercial software with a nonlinear analysis capability. Dr. Sandler developed a fluid-structure interaction approach for floating structures in the presence of cavitation cavitation Formation of vapour bubbles within a liquid at low-pressure regions that occur in places where the liquid has been accelerated to high velocities, as in the operation of centrifugal pumps, water turbines, and marine propellers. that supported the analysis effort for the shock trials of the USS ARKANSAS. This work became the basis of today's only workable approach to full-ship shock analysis of surface ships. Dr. Sandler also developed an impedance boundary condition for nonlinear material behavior. This boundary allows the use of fluid-island and soil-island approach to underwater and ground shock problems, extending the community's capability to deliver accurate answers to these highly complex problems. |
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