摘要：An LT-BEM is used to solve numerically a classof variable coefficient unsteady modified Helmholtz equation.The variable coefficients equation is transformed to a constantcoefficients equation which is then Laplace-transformed (LT)so that the time variable vanishes. A boundary-only integralequation involving a time-free fundamental solution can thenbe derived and employed to find numerical solutions using aboundary element method (BEM). The results obtained areinversely transformed numerically using the Stehfest formula.Some problems considered show that the combined LT-BEM iseasy to implement, efficient and accurate for solving numerically the problems.
