ROHR2
ROHR2 is a pipe stress analysis CAE system from SIGMA Ingenieurgesellschaft mbH, based in Unna, Germany. The software performs both static and dynamic analysis of complex piping and skeletal structures, and runs on Microsoft Windows platform. ROHR2 software comes with built in industry standard stress codes; such as ASME B31.1, B31.3, B31.4, B31.5, B31.8, EN 13480, CODETI; along with several GRP pipe codes; as well as nuclear stress codes such as ASME Cl. 1-3, KTA 3201.2, KTA 3211.2. Name. The brand name comes from the German word "Rohr" (pronounced as “ROAR“) which means "Pipe“. History. Early years as  a MBP product : 1960's to 1989. ROHR2 was created in the late 1960s by the one of the first software companies in Germany, (MBP), based in Dortmund. ROHR2 first ran on mainframes such as UNIVAC 1, CRAY, and later Prime computer. At the time, the program was command line driven with a proprietary programming language to describe the piping systems and define the various load conditions. The 1987 launched version 26, was released for IBM PC as well as IBM PC compatible systems. As a EDS / SIGMA product : 1989 to 2000. MBP was later taken over by EDS (then  a part of General Motors Corp., now part of HP Enterprise Services). In 1989, SIGMA Ingenieurgesellschaft mbH was founded in Dortmund, and the ROHR2 development and support team moved to the new office premises of SIGMA. The graphical user interface was added in 1994 to the product, which allowed the editing of piping systems without the need of mastering the earlier required programming language. Sigma Ingenieurgesellschaft mbH product : 2000 to present. From the year 2000 onwards, the complete licensing and sales activities came under the management of SIGMA Ingenieurgesellschaft mbH; which by then evolved into an engineering company specializing in  pipe engineering, as well as a software development firm. The recent developments include new bi-directional interfaces based on open standards for transfer of data with other CAD/CAE products such as - AVEVA PDMS, CADISON, Intergraph's PDS, Intergraph's SmartPlant, , MPDS4, Bentley System's AutoPLANT, Autodesk's PLANT3D and other PCF supported software. The integration of ROHR2 into the users workflow is supported by third-party interface products to ensure interoperability - a norm in the present engineering software industry. Software environment. The ROHR2 program system comes with the following software environments; consisting of ROHR2win - the graphical user interface, the  ROHR2 - calculation core, and various additional programs (see : related products). Calculation basics. The static analysis includes the calculation of static loads of any value, or combination in accordance with the theories of first - and second order for linear and non-linear boundary conditions (friction, support lift). Additional load conditions can also be applied, such as dynamic loads or harmonic excitation. Furthermore, the dynamic analysis include the calculation of eigenvalues and mode shapes as well as their processing in various modal response methods - for the analysis of, for example, earthquakes and fluid hammer. A non-linear time history module (ROHR2stoss) allows  the analysis of dynamic events in the time domain, while taking into account non-linear components such as snubbers or visco dampers based on the Maxwell model. An efficient superposition module enables a manifold selection and combination of static and dynamic results.